github.com
Open in
urlscan Pro
140.82.121.4
Public Scan
Submitted URL: https://regex.cool/
Effective URL: https://github.com/slevithan/awesome-regex
Submission: On June 10 via api from US — Scanned from DE
Effective URL: https://github.com/slevithan/awesome-regex
Submission: On June 10 via api from US — Scanned from DE
Form analysis 3 forms found in the DOM
GET
<form id="query-builder-test-form" action="" accept-charset="UTF-8" method="get">
<query-builder data-target="qbsearch-input.queryBuilder" id="query-builder-query-builder-test" data-filter-key=":" data-view-component="true" class="QueryBuilder search-query-builder" data-min-width="300" data-catalyst="">
<div class="FormControl FormControl--fullWidth">
<label id="query-builder-test-label" for="query-builder-test" class="FormControl-label sr-only"> Search </label>
<div class="QueryBuilder-StyledInput width-fit " data-target="query-builder.styledInput">
<span id="query-builder-test-leadingvisual-wrap" class="FormControl-input-leadingVisualWrap QueryBuilder-leadingVisualWrap">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-search FormControl-input-leadingVisual">
<path d="M10.68 11.74a6 6 0 0 1-7.922-8.982 6 6 0 0 1 8.982 7.922l3.04 3.04a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215ZM11.5 7a4.499 4.499 0 1 0-8.997 0A4.499 4.499 0 0 0 11.5 7Z"></path>
</svg>
</span>
<div data-target="query-builder.styledInputContainer" class="QueryBuilder-StyledInputContainer">
<div aria-hidden="true" class="QueryBuilder-StyledInputContent" data-target="query-builder.styledInputContent"></div>
<div class="QueryBuilder-InputWrapper">
<div aria-hidden="true" class="QueryBuilder-Sizer" data-target="query-builder.sizer"><span></span></div>
<input id="query-builder-test" name="query-builder-test" value="" autocomplete="off" type="text" role="combobox" spellcheck="false" aria-expanded="false" aria-describedby="validation-e6095cd8-a9a6-4f79-a0b9-839439e65323"
data-target="query-builder.input" data-action="
input:query-builder#inputChange
blur:query-builder#inputBlur
keydown:query-builder#inputKeydown
focus:query-builder#inputFocus
" data-view-component="true" class="FormControl-input QueryBuilder-Input FormControl-medium" aria-controls="query-builder-test-results" aria-autocomplete="list" aria-haspopup="listbox">
</div>
</div>
<span class="sr-only" id="query-builder-test-clear">Clear</span>
<button role="button" id="query-builder-test-clear-button" aria-labelledby="query-builder-test-clear query-builder-test-label" data-target="query-builder.clearButton" data-action="
click:query-builder#clear
focus:query-builder#clearButtonFocus
blur:query-builder#clearButtonBlur
" variant="small" hidden="" type="button" data-view-component="true" class="Button Button--iconOnly Button--invisible Button--medium mr-1 px-2 py-0 d-flex flex-items-center rounded-1 color-fg-muted"> <svg aria-hidden="true" height="16"
viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x-circle-fill Button-visual">
<path
d="M2.343 13.657A8 8 0 1 1 13.658 2.343 8 8 0 0 1 2.343 13.657ZM6.03 4.97a.751.751 0 0 0-1.042.018.751.751 0 0 0-.018 1.042L6.94 8 4.97 9.97a.749.749 0 0 0 .326 1.275.749.749 0 0 0 .734-.215L8 9.06l1.97 1.97a.749.749 0 0 0 1.275-.326.749.749 0 0 0-.215-.734L9.06 8l1.97-1.97a.749.749 0 0 0-.326-1.275.749.749 0 0 0-.734.215L8 6.94Z">
</path>
</svg>
</button>
</div>
<template id="search-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-search">
<path d="M10.68 11.74a6 6 0 0 1-7.922-8.982 6 6 0 0 1 8.982 7.922l3.04 3.04a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215ZM11.5 7a4.499 4.499 0 1 0-8.997 0A4.499 4.499 0 0 0 11.5 7Z"></path>
</svg>
</template>
<template id="code-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-code">
<path
d="m11.28 3.22 4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.275-.326.749.749 0 0 1 .215-.734L13.94 8l-3.72-3.72a.749.749 0 0 1 .326-1.275.749.749 0 0 1 .734.215Zm-6.56 0a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042L2.06 8l3.72 3.72a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L.47 8.53a.75.75 0 0 1 0-1.06Z">
</path>
</svg>
</template>
<template id="file-code-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-file-code">
<path
d="M4 1.75C4 .784 4.784 0 5.75 0h5.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v8.586A1.75 1.75 0 0 1 14.25 15h-9a.75.75 0 0 1 0-1.5h9a.25.25 0 0 0 .25-.25V6h-2.75A1.75 1.75 0 0 1 10 4.25V1.5H5.75a.25.25 0 0 0-.25.25v2.5a.75.75 0 0 1-1.5 0Zm1.72 4.97a.75.75 0 0 1 1.06 0l2 2a.75.75 0 0 1 0 1.06l-2 2a.749.749 0 0 1-1.275-.326.749.749 0 0 1 .215-.734l1.47-1.47-1.47-1.47a.75.75 0 0 1 0-1.06ZM3.28 7.78 1.81 9.25l1.47 1.47a.751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018l-2-2a.75.75 0 0 1 0-1.06l2-2a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042Zm8.22-6.218V4.25c0 .138.112.25.25.25h2.688l-.011-.013-2.914-2.914-.013-.011Z">
</path>
</svg>
</template>
<template id="history-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-history">
<path
d="m.427 1.927 1.215 1.215a8.002 8.002 0 1 1-1.6 5.685.75.75 0 1 1 1.493-.154 6.5 6.5 0 1 0 1.18-4.458l1.358 1.358A.25.25 0 0 1 3.896 6H.25A.25.25 0 0 1 0 5.75V2.104a.25.25 0 0 1 .427-.177ZM7.75 4a.75.75 0 0 1 .75.75v2.992l2.028.812a.75.75 0 0 1-.557 1.392l-2.5-1A.751.751 0 0 1 7 8.25v-3.5A.75.75 0 0 1 7.75 4Z">
</path>
</svg>
</template>
<template id="repo-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo">
<path
d="M2 2.5A2.5 2.5 0 0 1 4.5 0h8.75a.75.75 0 0 1 .75.75v12.5a.75.75 0 0 1-.75.75h-2.5a.75.75 0 0 1 0-1.5h1.75v-2h-8a1 1 0 0 0-.714 1.7.75.75 0 1 1-1.072 1.05A2.495 2.495 0 0 1 2 11.5Zm10.5-1h-8a1 1 0 0 0-1 1v6.708A2.486 2.486 0 0 1 4.5 9h8ZM5 12.25a.25.25 0 0 1 .25-.25h3.5a.25.25 0 0 1 .25.25v3.25a.25.25 0 0 1-.4.2l-1.45-1.087a.249.249 0 0 0-.3 0L5.4 15.7a.25.25 0 0 1-.4-.2Z">
</path>
</svg>
</template>
<template id="bookmark-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-bookmark">
<path
d="M3 2.75C3 1.784 3.784 1 4.75 1h6.5c.966 0 1.75.784 1.75 1.75v11.5a.75.75 0 0 1-1.227.579L8 11.722l-3.773 3.107A.751.751 0 0 1 3 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v9.91l3.023-2.489a.75.75 0 0 1 .954 0l3.023 2.49V2.75a.25.25 0 0 0-.25-.25Z">
</path>
</svg>
</template>
<template id="plus-circle-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-plus-circle">
<path d="M8 0a8 8 0 1 1 0 16A8 8 0 0 1 8 0ZM1.5 8a6.5 6.5 0 1 0 13 0 6.5 6.5 0 0 0-13 0Zm7.25-3.25v2.5h2.5a.75.75 0 0 1 0 1.5h-2.5v2.5a.75.75 0 0 1-1.5 0v-2.5h-2.5a.75.75 0 0 1 0-1.5h2.5v-2.5a.75.75 0 0 1 1.5 0Z"></path>
</svg>
</template>
<template id="circle-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-dot-fill">
<path d="M8 4a4 4 0 1 1 0 8 4 4 0 0 1 0-8Z"></path>
</svg>
</template>
<template id="trash-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-trash">
<path
d="M11 1.75V3h2.25a.75.75 0 0 1 0 1.5H2.75a.75.75 0 0 1 0-1.5H5V1.75C5 .784 5.784 0 6.75 0h2.5C10.216 0 11 .784 11 1.75ZM4.496 6.675l.66 6.6a.25.25 0 0 0 .249.225h5.19a.25.25 0 0 0 .249-.225l.66-6.6a.75.75 0 0 1 1.492.149l-.66 6.6A1.748 1.748 0 0 1 10.595 15h-5.19a1.75 1.75 0 0 1-1.741-1.575l-.66-6.6a.75.75 0 1 1 1.492-.15ZM6.5 1.75V3h3V1.75a.25.25 0 0 0-.25-.25h-2.5a.25.25 0 0 0-.25.25Z">
</path>
</svg>
</template>
<template id="team-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-people">
<path
d="M2 5.5a3.5 3.5 0 1 1 5.898 2.549 5.508 5.508 0 0 1 3.034 4.084.75.75 0 1 1-1.482.235 4 4 0 0 0-7.9 0 .75.75 0 0 1-1.482-.236A5.507 5.507 0 0 1 3.102 8.05 3.493 3.493 0 0 1 2 5.5ZM11 4a3.001 3.001 0 0 1 2.22 5.018 5.01 5.01 0 0 1 2.56 3.012.749.749 0 0 1-.885.954.752.752 0 0 1-.549-.514 3.507 3.507 0 0 0-2.522-2.372.75.75 0 0 1-.574-.73v-.352a.75.75 0 0 1 .416-.672A1.5 1.5 0 0 0 11 5.5.75.75 0 0 1 11 4Zm-5.5-.5a2 2 0 1 0-.001 3.999A2 2 0 0 0 5.5 3.5Z">
</path>
</svg>
</template>
<template id="project-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-project">
<path
d="M1.75 0h12.5C15.216 0 16 .784 16 1.75v12.5A1.75 1.75 0 0 1 14.25 16H1.75A1.75 1.75 0 0 1 0 14.25V1.75C0 .784.784 0 1.75 0ZM1.5 1.75v12.5c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25V1.75a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25ZM11.75 3a.75.75 0 0 1 .75.75v7.5a.75.75 0 0 1-1.5 0v-7.5a.75.75 0 0 1 .75-.75Zm-8.25.75a.75.75 0 0 1 1.5 0v5.5a.75.75 0 0 1-1.5 0ZM8 3a.75.75 0 0 1 .75.75v3.5a.75.75 0 0 1-1.5 0v-3.5A.75.75 0 0 1 8 3Z">
</path>
</svg>
</template>
<template id="pencil-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-pencil">
<path
d="M11.013 1.427a1.75 1.75 0 0 1 2.474 0l1.086 1.086a1.75 1.75 0 0 1 0 2.474l-8.61 8.61c-.21.21-.47.364-.756.445l-3.251.93a.75.75 0 0 1-.927-.928l.929-3.25c.081-.286.235-.547.445-.758l8.61-8.61Zm.176 4.823L9.75 4.81l-6.286 6.287a.253.253 0 0 0-.064.108l-.558 1.953 1.953-.558a.253.253 0 0 0 .108-.064Zm1.238-3.763a.25.25 0 0 0-.354 0L10.811 3.75l1.439 1.44 1.263-1.263a.25.25 0 0 0 0-.354Z">
</path>
</svg>
</template>
<template id="copilot-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copilot">
<path
d="M7.998 15.035c-4.562 0-7.873-2.914-7.998-3.749V9.338c.085-.628.677-1.686 1.588-2.065.013-.07.024-.143.036-.218.029-.183.06-.384.126-.612-.201-.508-.254-1.084-.254-1.656 0-.87.128-1.769.693-2.484.579-.733 1.494-1.124 2.724-1.261 1.206-.134 2.262.034 2.944.765.05.053.096.108.139.165.044-.057.094-.112.143-.165.682-.731 1.738-.899 2.944-.765 1.23.137 2.145.528 2.724 1.261.566.715.693 1.614.693 2.484 0 .572-.053 1.148-.254 1.656.066.228.098.429.126.612.012.076.024.148.037.218.924.385 1.522 1.471 1.591 2.095v1.872c0 .766-3.351 3.795-8.002 3.795Zm0-1.485c2.28 0 4.584-1.11 5.002-1.433V7.862l-.023-.116c-.49.21-1.075.291-1.727.291-1.146 0-2.059-.327-2.71-.991A3.222 3.222 0 0 1 8 6.303a3.24 3.24 0 0 1-.544.743c-.65.664-1.563.991-2.71.991-.652 0-1.236-.081-1.727-.291l-.023.116v4.255c.419.323 2.722 1.433 5.002 1.433ZM6.762 2.83c-.193-.206-.637-.413-1.682-.297-1.019.113-1.479.404-1.713.7-.247.312-.369.789-.369 1.554 0 .793.129 1.171.308 1.371.162.181.519.379 1.442.379.853 0 1.339-.235 1.638-.54.315-.322.527-.827.617-1.553.117-.935-.037-1.395-.241-1.614Zm4.155-.297c-1.044-.116-1.488.091-1.681.297-.204.219-.359.679-.242 1.614.091.726.303 1.231.618 1.553.299.305.784.54 1.638.54.922 0 1.28-.198 1.442-.379.179-.2.308-.578.308-1.371 0-.765-.123-1.242-.37-1.554-.233-.296-.693-.587-1.713-.7Z">
</path>
<path d="M6.25 9.037a.75.75 0 0 1 .75.75v1.501a.75.75 0 0 1-1.5 0V9.787a.75.75 0 0 1 .75-.75Zm4.25.75v1.501a.75.75 0 0 1-1.5 0V9.787a.75.75 0 0 1 1.5 0Z"></path>
</svg>
</template>
<template id="workflow-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-workflow">
<path
d="M0 1.75C0 .784.784 0 1.75 0h3.5C6.216 0 7 .784 7 1.75v3.5A1.75 1.75 0 0 1 5.25 7H4v4a1 1 0 0 0 1 1h4v-1.25C9 9.784 9.784 9 10.75 9h3.5c.966 0 1.75.784 1.75 1.75v3.5A1.75 1.75 0 0 1 14.25 16h-3.5A1.75 1.75 0 0 1 9 14.25v-.75H5A2.5 2.5 0 0 1 2.5 11V7h-.75A1.75 1.75 0 0 1 0 5.25Zm1.75-.25a.25.25 0 0 0-.25.25v3.5c0 .138.112.25.25.25h3.5a.25.25 0 0 0 .25-.25v-3.5a.25.25 0 0 0-.25-.25Zm9 9a.25.25 0 0 0-.25.25v3.5c0 .138.112.25.25.25h3.5a.25.25 0 0 0 .25-.25v-3.5a.25.25 0 0 0-.25-.25Z">
</path>
</svg>
</template>
<template id="book-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-book">
<path
d="M0 1.75A.75.75 0 0 1 .75 1h4.253c1.227 0 2.317.59 3 1.501A3.743 3.743 0 0 1 11.006 1h4.245a.75.75 0 0 1 .75.75v10.5a.75.75 0 0 1-.75.75h-4.507a2.25 2.25 0 0 0-1.591.659l-.622.621a.75.75 0 0 1-1.06 0l-.622-.621A2.25 2.25 0 0 0 5.258 13H.75a.75.75 0 0 1-.75-.75Zm7.251 10.324.004-5.073-.002-2.253A2.25 2.25 0 0 0 5.003 2.5H1.5v9h3.757a3.75 3.75 0 0 1 1.994.574ZM8.755 4.75l-.004 7.322a3.752 3.752 0 0 1 1.992-.572H14.5v-9h-3.495a2.25 2.25 0 0 0-2.25 2.25Z">
</path>
</svg>
</template>
<template id="code-review-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-code-review">
<path
d="M1.75 1h12.5c.966 0 1.75.784 1.75 1.75v8.5A1.75 1.75 0 0 1 14.25 13H8.061l-2.574 2.573A1.458 1.458 0 0 1 3 14.543V13H1.75A1.75 1.75 0 0 1 0 11.25v-8.5C0 1.784.784 1 1.75 1ZM1.5 2.75v8.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h6.5a.25.25 0 0 0 .25-.25v-8.5a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25Zm5.28 1.72a.75.75 0 0 1 0 1.06L5.31 7l1.47 1.47a.751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018l-2-2a.75.75 0 0 1 0-1.06l2-2a.75.75 0 0 1 1.06 0Zm2.44 0a.75.75 0 0 1 1.06 0l2 2a.75.75 0 0 1 0 1.06l-2 2a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L10.69 7 9.22 5.53a.75.75 0 0 1 0-1.06Z">
</path>
</svg>
</template>
<template id="codespaces-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-codespaces">
<path
d="M0 11.25c0-.966.784-1.75 1.75-1.75h12.5c.966 0 1.75.784 1.75 1.75v3A1.75 1.75 0 0 1 14.25 16H1.75A1.75 1.75 0 0 1 0 14.25Zm2-9.5C2 .784 2.784 0 3.75 0h8.5C13.216 0 14 .784 14 1.75v5a1.75 1.75 0 0 1-1.75 1.75h-8.5A1.75 1.75 0 0 1 2 6.75Zm1.75-.25a.25.25 0 0 0-.25.25v5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-5a.25.25 0 0 0-.25-.25Zm-2 9.5a.25.25 0 0 0-.25.25v3c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25v-3a.25.25 0 0 0-.25-.25Z">
</path>
<path d="M7 12.75a.75.75 0 0 1 .75-.75h4.5a.75.75 0 0 1 0 1.5h-4.5a.75.75 0 0 1-.75-.75Zm-4 0a.75.75 0 0 1 .75-.75h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1-.75-.75Z"></path>
</svg>
</template>
<template id="comment-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-comment">
<path
d="M1 2.75C1 1.784 1.784 1 2.75 1h10.5c.966 0 1.75.784 1.75 1.75v7.5A1.75 1.75 0 0 1 13.25 12H9.06l-2.573 2.573A1.458 1.458 0 0 1 4 13.543V12H2.75A1.75 1.75 0 0 1 1 10.25Zm1.75-.25a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h4.5a.25.25 0 0 0 .25-.25v-7.5a.25.25 0 0 0-.25-.25Z">
</path>
</svg>
</template>
<template id="comment-discussion-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-comment-discussion">
<path
d="M1.75 1h8.5c.966 0 1.75.784 1.75 1.75v5.5A1.75 1.75 0 0 1 10.25 10H7.061l-2.574 2.573A1.458 1.458 0 0 1 2 11.543V10h-.25A1.75 1.75 0 0 1 0 8.25v-5.5C0 1.784.784 1 1.75 1ZM1.5 2.75v5.5c0 .138.112.25.25.25h1a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h3.5a.25.25 0 0 0 .25-.25v-5.5a.25.25 0 0 0-.25-.25h-8.5a.25.25 0 0 0-.25.25Zm13 2a.25.25 0 0 0-.25-.25h-.5a.75.75 0 0 1 0-1.5h.5c.966 0 1.75.784 1.75 1.75v5.5A1.75 1.75 0 0 1 14.25 12H14v1.543a1.458 1.458 0 0 1-2.487 1.03L9.22 12.28a.749.749 0 0 1 .326-1.275.749.749 0 0 1 .734.215l2.22 2.22v-2.19a.75.75 0 0 1 .75-.75h1a.25.25 0 0 0 .25-.25Z">
</path>
</svg>
</template>
<template id="organization-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-organization">
<path
d="M1.75 16A1.75 1.75 0 0 1 0 14.25V1.75C0 .784.784 0 1.75 0h8.5C11.216 0 12 .784 12 1.75v12.5c0 .085-.006.168-.018.25h2.268a.25.25 0 0 0 .25-.25V8.285a.25.25 0 0 0-.111-.208l-1.055-.703a.749.749 0 1 1 .832-1.248l1.055.703c.487.325.779.871.779 1.456v5.965A1.75 1.75 0 0 1 14.25 16h-3.5a.766.766 0 0 1-.197-.026c-.099.017-.2.026-.303.026h-3a.75.75 0 0 1-.75-.75V14h-1v1.25a.75.75 0 0 1-.75.75Zm-.25-1.75c0 .138.112.25.25.25H4v-1.25a.75.75 0 0 1 .75-.75h2.5a.75.75 0 0 1 .75.75v1.25h2.25a.25.25 0 0 0 .25-.25V1.75a.25.25 0 0 0-.25-.25h-8.5a.25.25 0 0 0-.25.25ZM3.75 6h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1 0-1.5ZM3 3.75A.75.75 0 0 1 3.75 3h.5a.75.75 0 0 1 0 1.5h-.5A.75.75 0 0 1 3 3.75Zm4 3A.75.75 0 0 1 7.75 6h.5a.75.75 0 0 1 0 1.5h-.5A.75.75 0 0 1 7 6.75ZM7.75 3h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1 0-1.5ZM3 9.75A.75.75 0 0 1 3.75 9h.5a.75.75 0 0 1 0 1.5h-.5A.75.75 0 0 1 3 9.75ZM7.75 9h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1 0-1.5Z">
</path>
</svg>
</template>
<template id="rocket-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-rocket">
<path
d="M14.064 0h.186C15.216 0 16 .784 16 1.75v.186a8.752 8.752 0 0 1-2.564 6.186l-.458.459c-.314.314-.641.616-.979.904v3.207c0 .608-.315 1.172-.833 1.49l-2.774 1.707a.749.749 0 0 1-1.11-.418l-.954-3.102a1.214 1.214 0 0 1-.145-.125L3.754 9.816a1.218 1.218 0 0 1-.124-.145L.528 8.717a.749.749 0 0 1-.418-1.11l1.71-2.774A1.748 1.748 0 0 1 3.31 4h3.204c.288-.338.59-.665.904-.979l.459-.458A8.749 8.749 0 0 1 14.064 0ZM8.938 3.623h-.002l-.458.458c-.76.76-1.437 1.598-2.02 2.5l-1.5 2.317 2.143 2.143 2.317-1.5c.902-.583 1.74-1.26 2.499-2.02l.459-.458a7.25 7.25 0 0 0 2.123-5.127V1.75a.25.25 0 0 0-.25-.25h-.186a7.249 7.249 0 0 0-5.125 2.123ZM3.56 14.56c-.732.732-2.334 1.045-3.005 1.148a.234.234 0 0 1-.201-.064.234.234 0 0 1-.064-.201c.103-.671.416-2.273 1.15-3.003a1.502 1.502 0 1 1 2.12 2.12Zm6.94-3.935c-.088.06-.177.118-.266.175l-2.35 1.521.548 1.783 1.949-1.2a.25.25 0 0 0 .119-.213ZM3.678 8.116 5.2 5.766c.058-.09.117-.178.176-.266H3.309a.25.25 0 0 0-.213.119l-1.2 1.95ZM12 5a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z">
</path>
</svg>
</template>
<template id="shield-check-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-shield-check">
<path
d="m8.533.133 5.25 1.68A1.75 1.75 0 0 1 15 3.48V7c0 1.566-.32 3.182-1.303 4.682-.983 1.498-2.585 2.813-5.032 3.855a1.697 1.697 0 0 1-1.33 0c-2.447-1.042-4.049-2.357-5.032-3.855C1.32 10.182 1 8.566 1 7V3.48a1.75 1.75 0 0 1 1.217-1.667l5.25-1.68a1.748 1.748 0 0 1 1.066 0Zm-.61 1.429.001.001-5.25 1.68a.251.251 0 0 0-.174.237V7c0 1.36.275 2.666 1.057 3.859.784 1.194 2.121 2.342 4.366 3.298a.196.196 0 0 0 .154 0c2.245-.957 3.582-2.103 4.366-3.297C13.225 9.666 13.5 8.358 13.5 7V3.48a.25.25 0 0 0-.174-.238l-5.25-1.68a.25.25 0 0 0-.153 0ZM11.28 6.28l-3.5 3.5a.75.75 0 0 1-1.06 0l-1.5-1.5a.749.749 0 0 1 .326-1.275.749.749 0 0 1 .734.215l.97.97 2.97-2.97a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042Z">
</path>
</svg>
</template>
<template id="heart-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-heart">
<path
d="m8 14.25.345.666a.75.75 0 0 1-.69 0l-.008-.004-.018-.01a7.152 7.152 0 0 1-.31-.17 22.055 22.055 0 0 1-3.434-2.414C2.045 10.731 0 8.35 0 5.5 0 2.836 2.086 1 4.25 1 5.797 1 7.153 1.802 8 3.02 8.847 1.802 10.203 1 11.75 1 13.914 1 16 2.836 16 5.5c0 2.85-2.045 5.231-3.885 6.818a22.066 22.066 0 0 1-3.744 2.584l-.018.01-.006.003h-.002ZM4.25 2.5c-1.336 0-2.75 1.164-2.75 3 0 2.15 1.58 4.144 3.365 5.682A20.58 20.58 0 0 0 8 13.393a20.58 20.58 0 0 0 3.135-2.211C12.92 9.644 14.5 7.65 14.5 5.5c0-1.836-1.414-3-2.75-3-1.373 0-2.609.986-3.029 2.456a.749.749 0 0 1-1.442 0C6.859 3.486 5.623 2.5 4.25 2.5Z">
</path>
</svg>
</template>
<template id="server-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-server">
<path
d="M1.75 1h12.5c.966 0 1.75.784 1.75 1.75v4c0 .372-.116.717-.314 1 .198.283.314.628.314 1v4a1.75 1.75 0 0 1-1.75 1.75H1.75A1.75 1.75 0 0 1 0 12.75v-4c0-.358.109-.707.314-1a1.739 1.739 0 0 1-.314-1v-4C0 1.784.784 1 1.75 1ZM1.5 2.75v4c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25v-4a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25Zm.25 5.75a.25.25 0 0 0-.25.25v4c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25v-4a.25.25 0 0 0-.25-.25ZM7 4.75A.75.75 0 0 1 7.75 4h4.5a.75.75 0 0 1 0 1.5h-4.5A.75.75 0 0 1 7 4.75ZM7.75 10h4.5a.75.75 0 0 1 0 1.5h-4.5a.75.75 0 0 1 0-1.5ZM3 4.75A.75.75 0 0 1 3.75 4h.5a.75.75 0 0 1 0 1.5h-.5A.75.75 0 0 1 3 4.75ZM3.75 10h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1 0-1.5Z">
</path>
</svg>
</template>
<template id="globe-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-globe">
<path
d="M8 0a8 8 0 1 1 0 16A8 8 0 0 1 8 0ZM5.78 8.75a9.64 9.64 0 0 0 1.363 4.177c.255.426.542.832.857 1.215.245-.296.551-.705.857-1.215A9.64 9.64 0 0 0 10.22 8.75Zm4.44-1.5a9.64 9.64 0 0 0-1.363-4.177c-.307-.51-.612-.919-.857-1.215a9.927 9.927 0 0 0-.857 1.215A9.64 9.64 0 0 0 5.78 7.25Zm-5.944 1.5H1.543a6.507 6.507 0 0 0 4.666 5.5c-.123-.181-.24-.365-.352-.552-.715-1.192-1.437-2.874-1.581-4.948Zm-2.733-1.5h2.733c.144-2.074.866-3.756 1.58-4.948.12-.197.237-.381.353-.552a6.507 6.507 0 0 0-4.666 5.5Zm10.181 1.5c-.144 2.074-.866 3.756-1.58 4.948-.12.197-.237.381-.353.552a6.507 6.507 0 0 0 4.666-5.5Zm2.733-1.5a6.507 6.507 0 0 0-4.666-5.5c.123.181.24.365.353.552.714 1.192 1.436 2.874 1.58 4.948Z">
</path>
</svg>
</template>
<template id="issue-opened-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-issue-opened">
<path d="M8 9.5a1.5 1.5 0 1 0 0-3 1.5 1.5 0 0 0 0 3Z"></path>
<path d="M8 0a8 8 0 1 1 0 16A8 8 0 0 1 8 0ZM1.5 8a6.5 6.5 0 1 0 13 0 6.5 6.5 0 0 0-13 0Z"></path>
</svg>
</template>
<template id="device-mobile-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-device-mobile">
<path
d="M3.75 0h8.5C13.216 0 14 .784 14 1.75v12.5A1.75 1.75 0 0 1 12.25 16h-8.5A1.75 1.75 0 0 1 2 14.25V1.75C2 .784 2.784 0 3.75 0ZM3.5 1.75v12.5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25V1.75a.25.25 0 0 0-.25-.25h-8.5a.25.25 0 0 0-.25.25ZM8 13a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z">
</path>
</svg>
</template>
<template id="package-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-package">
<path
d="m8.878.392 5.25 3.045c.54.314.872.89.872 1.514v6.098a1.75 1.75 0 0 1-.872 1.514l-5.25 3.045a1.75 1.75 0 0 1-1.756 0l-5.25-3.045A1.75 1.75 0 0 1 1 11.049V4.951c0-.624.332-1.201.872-1.514L7.122.392a1.75 1.75 0 0 1 1.756 0ZM7.875 1.69l-4.63 2.685L8 7.133l4.755-2.758-4.63-2.685a.248.248 0 0 0-.25 0ZM2.5 5.677v5.372c0 .09.047.171.125.216l4.625 2.683V8.432Zm6.25 8.271 4.625-2.683a.25.25 0 0 0 .125-.216V5.677L8.75 8.432Z">
</path>
</svg>
</template>
<template id="credit-card-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-credit-card">
<path d="M10.75 9a.75.75 0 0 0 0 1.5h1.5a.75.75 0 0 0 0-1.5h-1.5Z"></path>
<path
d="M0 3.75C0 2.784.784 2 1.75 2h12.5c.966 0 1.75.784 1.75 1.75v8.5A1.75 1.75 0 0 1 14.25 14H1.75A1.75 1.75 0 0 1 0 12.25ZM14.5 6.5h-13v5.75c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25Zm0-2.75a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25V5h13Z">
</path>
</svg>
</template>
<template id="play-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-play">
<path d="M8 0a8 8 0 1 1 0 16A8 8 0 0 1 8 0ZM1.5 8a6.5 6.5 0 1 0 13 0 6.5 6.5 0 0 0-13 0Zm4.879-2.773 4.264 2.559a.25.25 0 0 1 0 .428l-4.264 2.559A.25.25 0 0 1 6 10.559V5.442a.25.25 0 0 1 .379-.215Z"></path>
</svg>
</template>
<template id="gift-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-gift">
<path
d="M2 2.75A2.75 2.75 0 0 1 4.75 0c.983 0 1.873.42 2.57 1.232.268.318.497.668.68 1.042.183-.375.411-.725.68-1.044C9.376.42 10.266 0 11.25 0a2.75 2.75 0 0 1 2.45 4h.55c.966 0 1.75.784 1.75 1.75v2c0 .698-.409 1.301-1 1.582v4.918A1.75 1.75 0 0 1 13.25 16H2.75A1.75 1.75 0 0 1 1 14.25V9.332C.409 9.05 0 8.448 0 7.75v-2C0 4.784.784 4 1.75 4h.55c-.192-.375-.3-.8-.3-1.25ZM7.25 9.5H2.5v4.75c0 .138.112.25.25.25h4.5Zm1.5 0v5h4.5a.25.25 0 0 0 .25-.25V9.5Zm0-4V8h5.5a.25.25 0 0 0 .25-.25v-2a.25.25 0 0 0-.25-.25Zm-7 0a.25.25 0 0 0-.25.25v2c0 .138.112.25.25.25h5.5V5.5h-5.5Zm3-4a1.25 1.25 0 0 0 0 2.5h2.309c-.233-.818-.542-1.401-.878-1.793-.43-.502-.915-.707-1.431-.707ZM8.941 4h2.309a1.25 1.25 0 0 0 0-2.5c-.516 0-1 .205-1.43.707-.337.392-.646.975-.879 1.793Z">
</path>
</svg>
</template>
<template id="code-square-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-code-square">
<path
d="M0 1.75C0 .784.784 0 1.75 0h12.5C15.216 0 16 .784 16 1.75v12.5A1.75 1.75 0 0 1 14.25 16H1.75A1.75 1.75 0 0 1 0 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25V1.75a.25.25 0 0 0-.25-.25Zm7.47 3.97a.75.75 0 0 1 1.06 0l2 2a.75.75 0 0 1 0 1.06l-2 2a.749.749 0 0 1-1.275-.326.749.749 0 0 1 .215-.734L10.69 8 9.22 6.53a.75.75 0 0 1 0-1.06ZM6.78 6.53 5.31 8l1.47 1.47a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215l-2-2a.75.75 0 0 1 0-1.06l2-2a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042Z">
</path>
</svg>
</template>
<template id="device-desktop-icon">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-device-desktop">
<path
d="M14.25 1c.966 0 1.75.784 1.75 1.75v7.5A1.75 1.75 0 0 1 14.25 12h-3.727c.099 1.041.52 1.872 1.292 2.757A.752.752 0 0 1 11.25 16h-6.5a.75.75 0 0 1-.565-1.243c.772-.885 1.192-1.716 1.292-2.757H1.75A1.75 1.75 0 0 1 0 10.25v-7.5C0 1.784.784 1 1.75 1ZM1.75 2.5a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25v-7.5a.25.25 0 0 0-.25-.25ZM9.018 12H6.982a5.72 5.72 0 0 1-.765 2.5h3.566a5.72 5.72 0 0 1-.765-2.5Z">
</path>
</svg>
</template>
<div class="position-relative">
<ul role="listbox" class="ActionListWrap QueryBuilder-ListWrap" aria-label="Suggestions" data-action="
combobox-commit:query-builder#comboboxCommit
mousedown:query-builder#resultsMousedown
" data-target="query-builder.resultsList" data-persist-list="false" id="query-builder-test-results"></ul>
</div>
<div class="FormControl-inlineValidation" id="validation-e6095cd8-a9a6-4f79-a0b9-839439e65323" hidden="hidden">
<span class="FormControl-inlineValidation--visual">
<svg aria-hidden="true" height="12" viewBox="0 0 12 12" version="1.1" width="12" data-view-component="true" class="octicon octicon-alert-fill">
<path d="M4.855.708c.5-.896 1.79-.896 2.29 0l4.675 8.351a1.312 1.312 0 0 1-1.146 1.954H1.33A1.313 1.313 0 0 1 .183 9.058ZM7 7V3H5v4Zm-1 3a1 1 0 1 0 0-2 1 1 0 0 0 0 2Z"></path>
</svg>
</span>
<span></span>
</div>
</div>
<div data-target="query-builder.screenReaderFeedback" aria-live="polite" aria-atomic="true" class="sr-only"></div>
</query-builder>
</form>POST /search/feedback
<form id="code-search-feedback-form" data-turbo="false" action="/search/feedback" accept-charset="UTF-8" method="post"><input type="hidden" data-csrf="true" name="authenticity_token"
value="CIX34hfrPIq3nQwLlCDhLWca8Fc/IPhx54gzhxz00paTap4P8CwVbL1bJm0f6WwvlE9Wf8/6uF4Z+TP8reEhkg==">
<p>We read every piece of feedback, and take your input very seriously.</p>
<textarea name="feedback" class="form-control width-full mb-2" style="height: 120px" id="feedback"></textarea>
<input name="include_email" id="include_email" aria-label="Include my email address so I can be contacted" class="form-control mr-2" type="checkbox">
<label for="include_email" style="font-weight: normal">Include my email address so I can be contacted</label>
</form>POST /search/custom_scopes
<form id="custom-scopes-dialog-form" data-turbo="false" action="/search/custom_scopes" accept-charset="UTF-8" method="post"><input type="hidden" data-csrf="true" name="authenticity_token"
value="JkpWFS0F06ZpD7bOwRJJzUuD30AGjtLex5j5J2CqXGtA41d/b+kMFl6tFaW83UYNrx4Mmh9J17gm+jswz3062Q==">
<div data-target="custom-scopes.customScopesModalDialogFlash"></div>
<input type="hidden" id="custom_scope_id" name="custom_scope_id" data-target="custom-scopes.customScopesIdField">
<div class="form-group">
<label for="custom_scope_name">Name</label>
<auto-check src="/search/custom_scopes/check_name" required="">
<input type="text" name="custom_scope_name" id="custom_scope_name" data-target="custom-scopes.customScopesNameField" class="form-control" autocomplete="off" placeholder="github-ruby" required="" maxlength="50" spellcheck="false">
<input type="hidden" data-csrf="true" value="p2vlybNkJkxNvjlzV62vtVBgT54kjINzrfs3/WPB2qgalpx5L7i5X6vrrDvHuDl6O7j9OYPoSONTYx/qTJjD1A==">
</auto-check>
</div>
<div class="form-group">
<label for="custom_scope_query">Query</label>
<input type="text" name="custom_scope_query" id="custom_scope_query" data-target="custom-scopes.customScopesQueryField" class="form-control" autocomplete="off" placeholder="(repo:mona/a OR repo:mona/b) AND lang:python" required=""
maxlength="500">
</div>
<p class="text-small color-fg-muted"> To see all available qualifiers, see our <a class="Link--inTextBlock" href="https://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax">documentation</a>. </p>
</form>Text Content
Skip to content
NAVIGATION MENU
Toggle navigation
Sign in
* Product
* Actions
Automate any workflow
* Packages
Host and manage packages
* Security
Find and fix vulnerabilities
* Codespaces
Instant dev environments
* GitHub Copilot
Write better code with AI
* Code review
Manage code changes
* Issues
Plan and track work
* Discussions
Collaborate outside of code
Explore
* All features
* Documentation
* GitHub Skills
* Blog
* Solutions
For
* Enterprise
* Teams
* Startups
* Education
By Solution
* CI/CD & Automation
* DevOps
* DevSecOps
Resources
* Learning Pathways
* White papers, Ebooks, Webinars
* Customer Stories
* Partners
* Open Source
* GitHub Sponsors
Fund open source developers
* The ReadME Project
GitHub community articles
Repositories
* Topics
* Trending
* Collections
* Enterprise
* Enterprise platform
AI-powered developer platform
Available add-ons
* Advanced Security
Enterprise-grade security features
* GitHub Copilot
Enterprise-grade AI features
* Premium Support
Enterprise-grade 24/7 support
* Pricing
Search or jump to...
SEARCH CODE, REPOSITORIES, USERS, ISSUES, PULL REQUESTS...
Search
Clear
Search syntax tips
PROVIDE FEEDBACK
We read every piece of feedback, and take your input very seriously.
Include my email address so I can be contacted
Cancel Submit feedback
SAVED SEARCHES
USE SAVED SEARCHES TO FILTER YOUR RESULTS MORE QUICKLY
Name
Query
To see all available qualifiers, see our documentation.
Cancel Create saved search
Sign in
Sign up
You signed in with another tab or window. Reload to refresh your session. You
signed out in another tab or window. Reload to refresh your session. You
switched accounts on another tab or window. Reload to refresh your session.
Dismiss alert
{{ message }}
slevithan / awesome-regex Public
* Notifications You must be signed in to change notification settings
* Fork 1
* Star 137
*
An opinionated list of regular expression tools, tutorials, libraries, etc.
regex.cool
LICENSE
View license
137 stars 1 fork Branches Tags Activity
Star
Notifications You must be signed in to change notification settings
* Code
* Issues 0
* Pull requests 0
* Actions
* Security
* Insights
Additional navigation options
* Code
* Issues
* Pull requests
* Actions
* Security
* Insights
SLEVITHAN/AWESOME-REGEX
This commit does not belong to any branch on this repository, and may belong to
a fork outside of the repository.
main
1 Branch
0 Tags
Go to file
Code
FOLDERS AND FILES
NameName
Last commit message
Last commit date
LATEST COMMIT
slevithan
Add regex.rip ReDoS checker
Jun 8, 2024
af1a11d · Jun 8, 2024
HISTORY
130 Commits
.GITHUB/WORKFLOWS
.GITHUB/WORKFLOWS
Updates for awesome-lint 1.2
Jun 4, 2024
MEDIA
MEDIA
Add logo without text
May 20, 2024
.GITIGNORE
.GITIGNORE
First commit
May 3, 2024
CONTRIBUTING.MD
CONTRIBUTING.MD
Punctuation tweaks
May 6, 2024
LICENSE
LICENSE
First commit
May 3, 2024
README.MD
README.MD
Add regex.rip ReDoS checker
Jun 8, 2024
View all files
REPOSITORY FILES NAVIGATION
* README
* License
Shortcut URL: regex.cool
Awesome Regex curates the best regular expression tools, tutorials, libraries,
and other resources. It covers all major regex flavors, and currently includes
especially deep coverage of regular expressions in JavaScript.
> Regular expressions (regex or regexp) are a powerful and concise way to
> search, parse, and process text. They're built into many programming
> languages, text editors, IDEs, database engines, word processors, and other
> tools.
Contributions are welcome. Add links through pull requests (guidelines) or
create an issue to start a discussion.
📖 Glossary
A brief glossary of regular expression terms as used in this list.
* Regex engine: Software that parses and executes regular expressions, either
built into a programming language or as a standalone library (synonym:
implementation).
* Regex flavor: A unique set of regex syntax and behavior. Basic syntax is
typically shared across flavors, but more advanced features often vary,
sometimes in subtle or incompatible ways. A flavor might be shared across
multiple implementations or programming languages.
* Ex: The “JavaScript” flavor is defined by the ECMAScript spec; implemented
by multiple engines (V8, etc.).
* Ex: The “PCRE” flavor is the PCRE2 library, used by numerous programming
languages and tools.
* Ex: Ruby swapped its regex implementation twice from version 1.8 ➜ 1.9 ➜
2.0, so each used a distinct flavor. The Ruby 2.0+ flavor is referred to
here as either “Ruby” or “Onigmo” (the underlying regex library).
* Non-backtracking engine: Sometimes referred to elsewhere as a “DFA” engine.
Non-backtracking engines like RE2 and Rust's regex run in linear time because
they don't use backtracking. This rules out worst case performance from
superlinear backtracking, but it's slower with some patterns and precludes
some useful features like backreferences.
CONTENTS
* Testers
* Syntax-free regex builders
* Visualizers
* Grep-like tools
* Tutorials
* Regex engines
* Documentation
* Source code
* Flavor differences
* Performance
* Collections of patterns
* JavaScript regex libraries
* JavaScript regex evolution
* Books
* Articles
* Communities
* Miscelaneous
TESTERS
For building, testing, and playing with regexes.
* regex101 - Best free and best web-based tester.
* Flavors: Java, JavaScript, .NET, PCRE, RE2, Rust, and emulates Python.
* Includes regex debugger (PCRE only).
* RegexBuddy (, $40) - Best tester.
* Flavors: Emulates hundreds of flavors/versions, with deep knowledge of
differences.
* Includes regex debugger.
* RegExr [GitHub] - Best open source tester.
* Flavors: JavaScript, PCRE.
* Languages: 🇺🇸, 🇨🇳 (fork).
* RegexLearn [GitHub] - Best multilingual tester (JavaScript).
* Languages: 🇺🇸, 🇹🇷, 🇷🇺, 🇪🇸, 🇨🇳, 🇩🇪, 🇺🇦, 🇫🇷, 🇵🇱, 🇰🇷,
🇧🇷, 🇨🇿, 🇬🇪.
* regexplained [GitHub] - Best tester for presentations (JavaScript).
✳️ Notable mentions
Flavors
* JavaScript: RegViz.
* .NET: Regex Storm [GitHub].
* PCRE: PHP Live Regex.
* Python: Pythex.
* Ruby: Rubular.
Multiple flavors
* CyrilEx [GitHub] - Java, JavaScript, MySQL, PHP, Python, Ruby.
* Patterns (, $3) - Bash, Emacs, grep, Java, Oniguruma, PCRE, POSIX BRE, POSIX
ERE, Ruby, sed.
* RegexPlanet [GitHub] - Go, Haskell, Java, JavaScript, .NET, Perl, PHP,
PostgreSQL, Python, Ruby, Tcl, XRegExp.
SYNTAX-FREE REGEX BUILDERS
Build regexes without writing regex syntax or code.
* ChatGPT (and other LLMs) - Ex: "create a regex that matches X and explain it
step by step".
* RegexMagic (, $40) - Generate regexes using samples and rules.
* Flavors: Emulates hundreds of flavors/versions.
✳️ Notable mentions
* Regex Generator [GitHub] - Generate simple regexes from a sample text.
* Regex.ai - Mark samples in a text and use AI to generate potential regexes.
VISUALIZERS
Visualize how your regular expressions are structured or operate.
* Regex Vis [GitHub] - Create railroad diagrams, with visual editor. Flavor:
JavaScript.
* Languages: 🇺🇸, 🇨🇳.
* Regulex [GitHub] - Create railroad diagrams. Flavor: JavaScript.
* Nodexr [GitHub] - Graphical editor with visual hierarchy. Flavor: .NET.
✳️ Notable mentions
* Regex Nodes [GitHub] - Graphical editor with visual hierarchy. Flavor:
JavaScript.
* Debuggex - Create railroad diagrams. Flavors: JavaScript, PCRE, Python.
* RegExper [GitLab] - Create railroad diagrams. Flavor: JavaScript.
GREP-LIKE TOOLS
Search and replace through files.
COMMAND LINE
* ripgrep - Better and faster grep. Recursively searches directories while
respecting gitignore rules and skipping hidden/binary files.
* Flavors: Rust (default), PCRE.
➕ See also: Feature comparison of grep-like tools.
GUI
* Aba Search and Replace (, $30) - Displays matches as you type.
* PowerGREP (, $159) - Can search through archives, binary files, PDFs,
docs/sheets, emails, etc., via its GUI or the command line.
* Flavors: Emulates hundreds of flavors/versions.
* RegexRenamer () - Rename files using regexes.
TUTORIALS
Learn how to use regular expressions.
TRADITIONAL
* Regular-Expressions.info - Covers numerous regex flavors.
* The Modern JavaScript Tutorial: Regular expressions [GitHub] - Guide to using
regexes in modern JavaScript.
* Languages: 🇺🇸, 🇪🇸, 🇫🇷, 🇮🇹, 🇯🇵, 🇷🇺, 🇺🇦, 🇨🇳 (partial for
others).
✳️ Notable mentions
* RexEgg - Detailed tutorial with advanced topics.
* learnbyexample [GitHub] - Ebooks on regexes (JavaScript, Python, Ruby) and
command line text processing.
* Regular Expressions for Regular Folk [GitHub] - Visual, example-based ebook
for beginners.
WITH INTERACTIVE EXERCISES
* RegexLearn [GitHub] - Interactive tutorial and practice problems.
* Languages: 🇺🇸, 🇹🇷, 🇷🇺, 🇪🇸, 🇨🇳, 🇩🇪, 🇺🇦, 🇫🇷, 🇵🇱, 🇰🇷,
🇧🇷, 🇨🇿, 🇬🇪.
* RegexOne - Interactive tutorial and practice problems.
VIDEOS
* Demystifying Regular Expressions - Great presentation for beginners, by Lea
Verou at HolyJS 2017 (1hr 12m).
* Learn Regular Expressions In 20 Minutes - Live syntax walkthrough in a regex
tester, by Kyle Cook.
* Many options for video courses are available on Udemy ($).
REGEX ENGINES
Major regex implementations, built into programming languages or as standalone
libraries.
DOCUMENTATION
Official regex references and guides.
REGEX FLAVORS
* JavaScript (MDN): RegExp, Reference, Guide.
* Boost.Regex: Manual.
* C++: Regular expressions library.
* Hyperscan: Introduction.
* ICU: Regular Expressions.
* Java: Pattern, API.
* .NET: Overview, Language, API.
* Onigmo: RE.
* PCRE: pcre2pattern, API.
* Perl: Syntax, Tutorial, Quick Start.
* Python: re.
* RE2: Syntax.
* Rust: regex, regex_lite.
ℹ️ Raku (formerly Perl 6) reimagines regexes. See: Grammars (tutorial), Regexes
(best practices).
WITHOUT OWN FLAVOR
* MySQL: Regular Expressions - Flavor: ICU.
* PHP: Regular Expressions - Flavor: PCRE.
* Ruby: Regexp - Flavor: Onigmo.
* Swift: NSRegularExpression - Flavor: ICU.
SOURCE CODE
Read or contribute to the code behind major regex implementations.
* V8: Irregexp - JavaScript RegExp engine used by Chrome, etc.
* Boost.Regex - Popular C++ regex library.
* Hyperscan - Intel's high-performance library, used for DPI.
* ICU - Unicode org's package with full Unicode support.
* Java: java.util.regex - JDK standard regexes.
* .NET: System.Text.RegularExpressions - Shared by all .NET languages (C#, VB,
etc.).
* Onigmo - Forked and extended from Oniguruma. Default regex library of Ruby
2.0+.
* Oniguruma - Popular C regex library. Default regex library of Ruby 1.9.
* PCRE2 - Popular C regex library used by PHP, R, etc.
* Perl - See perlreguts.
* Python: re and regex - Standard and extended regex libraries.
* RE2 - Popular C++ regex library used by Go, etc. Non-backtracking engine.
* Rust: regex - Non-backtracking engine.
FLAVOR DIFFERENCES
Syntax and behavior differences between regex flavors.
* Ron Buckton: Regular Expression Feature Comparisons [GitHub].
* Regular-Expressions.info: Tools & Languages.
* Steven Levithan: Named capture, Lookbehind.
* Wikipedia: Comparison of regular expression engines.
PERFORMANCE
Pattern and engine performance, benchmarks, and ReDoS prevention.
CRAFTING EFFICIENT REGEXES
* Runaway Regular Expressions: Catastrophic Backtracking - Exploration and
solutions for superlinear backtracking.
* Book: High Performance JavaScript (2010) - Chapter 5: Strings and Regular
Expressions.
* Book: Mastering Regular Expressions, 3rd Edition (2006) - Chapter 6: Crafting
an Efficient Expression.
* Performance of Greedy vs. Lazy Regex Quantifiers - Illustrates the mechanics
of backtracking.
ℹ️ With backtracking engines, how you craft a regex can affect how fast it finds
matches or reports failures.
REGEX ENGINE OPTIMIZATIONS
* Regular Expression Matching Can Be Simple And Fast - On non-backtracking
engines. A follow up includes comparisons of RE2 and PCRE performance.
* Regular Expression Improvements in .NET 7 and .NET 5 - Includes detailed
explanations of performance optimizations.
* ripgrep is faster than {grep, …} - Includes details about what makes ripgrep
and Rust's regex fast.
BENCHMARKING
* Libraries for cross-engine benchmarking: rebar, regex-benchmark,
sljit/regex_perf.html.
* Boost.Regex: Performance - Compares Boost, C++ std::regex, and others.
REDOS CHECKERS
* regex.rip - Test a regex for ReDoS vulnerability.
* recheck [home] - JavaScript and Scala library for detecting ReDoS
vulnerability. Can be used as an ESLint plugin.
* vuln-regex-detector - Perl library for detecting ReDoS vulnerability.
⚠️ These tools aren't able to find vulnerabilities in all cases and have
limitations on supported syntax.
COLLECTIONS OF PATTERNS
Prewritten regexes for specific tasks.
* Book: Regular Expressions Cookbook, 2nd Edition (2012) - High-quality
solutions with detailed explanations.
* Flavors: Java, JavaScript, .NET, PCRE, Perl, Python, Ruby, XRegExp.
* Regex DB - Solutions include basic descriptions and examples of matching and
non-matching text.
⚠️ Word of warning
Many regexes found online are low quality. It's risky to use regexes you don't
fully understand in code, since they might have false positives/negatives, be
vulnerable to performance problems with certain target strings, or assume a
different regex flavor.
JAVASCRIPT REGEX LIBRARIES
Open source JavaScript libraries for advanced regex use and processing.
ALTERNATIVE REGEX BUILDERS AND ENGINES
* regex - A template tag with best practices built-in and advanced features.
* XRegExp [home] - Extended regex syntax, flags, and utils; useful for
backcompat.
* incr-regex-package - Partial/incremental matching, used by react-rxinput for
input validation with a regex mask.
* node-re2 - Bindings for RE2, a non-backtracking engine.
* rregex - Bindings for Rust's regex, a non-backtracking engine.
ABSTRACTED REGEX SYNTAX
* Rexx - A template tag that uses structured syntax with variables and
comments.
* Melody [docs] - A language that compiles to regexes.
* Compose with functions: compose-regexp.js, VerbalExpressions (implementations
for many languages), magic-regexp [home], Super Expressive [playground].
REGEX PROCESSORS
* AST builders: regexp-tree (includes optimizer, etc.), regexpp (used by
ESLint), regjsparser/regjsgen.
* AST Explorer: RegExp - View ASTs generated by regexp-tree, regexpp, and
regjsparser.
* regexp-ast-analysis [docs] - Analyze AST nodes produced by regexpp.
* Highlight regex syntax: Regex Colorizer [home], CodeMirror PCRE mode.
* Find regex mistakes and improvements: eslint-plugin-regexp [home],
eslint-plugin-optimize-regex.
* Generate strings that match a given regex: randexp.js, regex-to-strings.
* Generate a regex from given strings: regexgen.
JAVASCRIPT REGEX EVOLUTION
A concise history of improvements to regular expressions in the JavaScript
standard, with links to the TC39 proposals where features were developed and
discussed.
* ES3 (1999) introduced powerful regular expressions, though limited compared
to other major flavors.
* ES5 (2009) fixed unintuitive behavior by creating a new object every time
regex literals are evaluated [explainer], and allowed regex literals to use
unescaped forward slashes within character clases (/[/]/).
* ES6/ES2015 added: [explainer]
* Flag y (sticky), which anchors matches to lastIndex.
* Flag u (unicode) [explainer] [2016 spec fix], which adds Unicode code point
escapes via \u{…}, errors for unreserved letter escapes, Unicode
case-folding for flag i, and surrogate pairs as code points (with impact on
quantifiers, character classes, character class ranges, and built-in sets
like . and \W).
* Getter RegExp.prototype.flags.
* Can subclass RegExp, plus
RegExp.prototype[Symbol.match/replace/search/split] and
RegExp[Symbol.species] for use in subclasses.
* Use RegExp to copy a regex, optionally with new flags.
* ES2018 added flag s (dotAll), lookbehind, named capture, and Unicode
properties via \p{…} and \P{…} behind flag u (see list).
* ES2020 added string method matchAll (which returns an iterator), plus
RegExp.prototype[Symbol.matchAll].
* ES2021 added replaceAll.
* ES2022 added flag d (hasIndices), which provides start/end indices for
matched substrings.
* ES2024 added flag v (unicodeSets) [explainer] as an upgrade to flag u (can't
be used together), which adds a set of multicharacter "properties of strings"
to \p{…}, multicharacter elements within character classes via \p{…} and
\q{…|…}, nested character classes, set operators […--…] and […&&…], improved
case-insensitive matching, and different escaping rules within character
classes.
> ES2019, ES2020, ES2021, ES2022, and ES2023 each added additional Unicode
> properties that can be used via \p{…} and \P{…} (see lists).
➕ See also
* Backcompat libraries: regexpu, regenerate (Unicode property sets).
* Chrome's l (linear) regex flag, behind a V8 flag [explainer] [how to run].
* Can I use - Up-to-date browser support tables for individual features.
🔮 Future: Active proposals
* Duplicate named capturing groups (2022) - Ex: (?<a>…)|(?<a>…).
* Extended mode and comments (2021) - Flag x (extended) with insignificant
whitespace and line comments (#…), plus inline comments via (?#…).
* Pattern modifiers (2021) - Ex: (?ims:…), (?-ims:…), (?i-ms:…).
* Atomic operators (2021) - Atomic groups via (?>…) and possessive quantifiers
(ex: *+, ++).
* Buffer boundaries (2021) - Anchors \A and \z, not affected by flag m.
* \R escape (2021) - Outside character classes, \R matches any line terminator.
* Restrict subclassing support in built-ins (2020) - Scaled back RegExp
subclassing.
* RegExp escaping (2015) - RegExp.escape.
* Legacy RegExp features (2015) - Standardization of legacy features.
BOOKS
A curated list of regex books.
* Regular Expressions Cookbook, 2nd Edition (2012) by Jan Goyvaerts and Steven
Levithan - Regex tutorial with code samples for eight programming languages,
100+ regex recipes for practical problems, and a deep focus on cross-flavor
differences.
* Flavors: Java, JavaScript, .NET, PCRE, Perl, Python, Ruby, XRegExp.
* Mastering Regular Expressions, 3rd Edition (2006) by Jeffrey Friedl - A
computer science classic, best for people who already know the basics.
Includes good coverage of crafting efficient regexes.
* Flavors: Dedicated chapters on Java, .NET, Perl, and PHP (PCRE), with more
limited coverage of Python, Tcl, command line tools, etc.
* Introducing Regular Expressions (2012) by Michael Fitzgerald - An intro for
programmers new to regular expressions that sticks to the basics.
ARTICLES
A curated list of regex articles.
* The World's Shortest Regex Compiler? and a follow up on optimization -
Introduction to writing a non-backtracking regex engine (in JavaScript).
* Regex Legends: The People Behind the Magic - Influential people behind the
technology.
* Fun With .NET Regex Balancing Groups - Advanced usage of a .NET-only regex
feature.
COMMUNITIES
Discuss, assist, and get help with regular expressions.
* Reddit: r/regex
* Stack Overflow: [regex]
MISCELANEOUS
Other interesting, fun, and useful stuff.
* Chrome extension: Regex - Regex search on webpages via Ctrl+Shift+F.
* Quiz: regex101 Regex Quiz - Requires sign-in.
* Games: Regex Crossword, Redoku.
* Comics: xkcd, Garabato Kid.
ABOUT
An opinionated list of regular expression tools, tutorials, libraries, etc.
regex.cool
TOPICS
awesome regex regexp regular-expression awesome-list
RESOURCES
Readme
LICENSE
View license
Activity
STARS
137 stars
WATCHERS
5 watching
FORKS
1 fork
Report repository
FOOTER
© 2024 GitHub, Inc.
FOOTER NAVIGATION
* Terms
* Privacy
* Security
* Status
* Docs
* Contact
* Manage cookies
* Do not share my personal information
You can’t perform that action at this time.