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JS REFERENCE

JS by Category JS by Alphabet



JAVASCRIPT

JS Array
concat() constructor copyWithin() entries() every() fill() filter() find()
findIndex() forEach() from() includes() indexOf() isArray() join() keys()
lastIndexOf() length map() pop() prototype push() reduce() reduceRight()
reverse() shift() slice() some() sort() splice() toString() unshift() valueOf()
JS Boolean
constructor prototype toString() valueOf()
JS Classes
constructor() extends static super
JS Date
constructor getDate() getDay() getFullYear() getHours() getMilliseconds()
getMinutes() getMonth() getSeconds() getTime() getTimezoneOffset() getUTCDate()
getUTCDay() getUTCFullYear() getUTCHours() getUTCMilliseconds() getUTCMinutes()
getUTCMonth() getUTCSeconds() now() parse() prototype setDate() setFullYear()
setHours() setMilliseconds() setMinutes() setMonth() setSeconds() setTime()
setUTCDate() setUTCFullYear() setUTCHours() setUTCMilliseconds() setUTCMinutes()
setUTCMonth() setUTCSeconds() toDateString() toISOString() toJSON()
toLocaleDateString() toLocaleTimeString() toLocaleString() toString()
toTimeString() toUTCString() UTC() valueOf()
JS Error
name message
JS Global
decodeURI() decodeURIComponent() encodeURI() encodeURIComponent() escape()
eval() Infinity isFinite() isNaN() NaN Number() parseFloat() parseInt() String()
undefined unescape()
JS JSON
parse() stringify()
JS Math
abs() acos() acosh() asin() asinh() atan() atan2() atanh() cbrt() ceil() clz32()
cos() cosh() E exp() expm1() floor() fround() LN2 LN10 log() log10() log1p()
log2() LOG2E LOG10E max() min() PI pow() random() round() sign() sin() sinh()
sqrt() SQRT1_2 SQRT2 tan() tanh() trunc()
JS Number
constructor EPSILON isFinite() isInteger() isNaN() isSafeInteger()
MAX_SAFE_INTEGER MIN_SAFE_INTEGER MAX_VALUE MIN_VALUE NaN NEGATIVE_INFINITY
POSITIVE_INFINITY parseFloat() parseInt() prototype toExponential() toFixed()
toLocaleString() toPrecision() toString() valueOf()
JS Object
constructor keys() prototype toString() valueOf()
JS Operators JS Precedence JS RegExp
Modifiers: g i m Groups: [abc] [^abc] [0-9] [^0-9] (x|y) Metacharacters: . \w \W
\d \D \s \S \b \B \0 \n \f \r \t \v \xxx \xdd \uxxxx Quantifiers: + * ? {X}
{X,Y} {X,} $ ^ ?= ?! Properties: constructor global ignoreCase lastIndex
multiline source Methods: compile() exec() test() toString()
JS Statements
break class const continue debugger do...while for for...in for...of function
if...else let return switch throw try...catch var while
JS String
charAt() charCodeAt() codePointAt() concat() constructor endsWith()
fromCharCode() includes() indexOf() lastIndexOf() length localeCompare() match()
prototype repeat() replace() search() slice() split() startsWith() substr()
substring() toLocaleLowerCase() toLocaleUpperCase() toLowerCase() toString()
toUpperCase() trim() trimEnd() trimStart() valueOf()
JS TypedArray



WINDOW

Window Object
alert() atob() blur() btoa() clearInterval() clearTimeout() close() closed
confirm() console defaultStatus document focus() frameElement frames history
getComputedStyle() innerHeight innerWidth length localStorage location
matchMedia() moveBy() moveTo() name navigator open() opener outerHeight
outerWidth pageXOffset pageYOffset parent print() prompt() resizeBy() resizeTo()
screen screenLeft screenTop screenX screenY scrollBy() scrollTo() scrollX
scrollY sessionStorage self setInterval() setTimeout() status stop() top
Window Console
assert() clear() count() error() group() groupCollapsed() groupEnd() info()
log() table() time() timeEnd() trace() warn()
Window History
back() forward() go() length
Window Location
assign() hash host hostname href origin pathname port protocol reload()
replace() search
Window Navigator
appCodeName appName appVersion cookieEnabled geolocation javaEnabled() language
onLine platform product taintEnabled() userAgent
Window Screen
availHeight availWidth colorDepth height pixelDepth width



HTML DOM

HTML Documents
activeElement addEventListener() adoptNode() anchors applets baseURI body
charset characterSet close() cookie createAttribute() createComment()
createDocumentFragment() createElement() createEvent() createTextNode()
defaultView designMode doctype documentElement documentMode documentURI domain
domConfig embeds execCommand() forms getElementById() getElementsByClassName()
getElementsByName() getElementsByTagName() hasFocus() head images implementation
importNode() inputEncoding lastModified links normalize() normalizeDocument()
open() querySelector() querySelectorAll() readyState referrer
removeEventListener() renameNode() scripts strictErrorChecking title URL write()
writeln()
HTML Elements
accessKey addEventListener() appendChild() attributes blur() childElementCount
childNodes children classList className click() clientHeight clientLeft
clientTop clientWidth cloneNode() closest() compareDocumentPosition() contains()
contentEditable dir firstChild firstElementChild focus() getAttribute()
getAttributeNode() getBoundingClientRect() getElementsByClassName()
getElementsByTagName() hasAttribute() hasAttributes() hasChildNodes() id
innerHTML innerText insertAdjacentElement() insertAdjacentHTML()
insertAdjacentText() insertBefore() isContentEditable isDefaultNamespace()
isEqualNode() isSameNode() isSupported() lang lastChild lastElementChild
matches() namespaceURI nextSibling nextElementSibling nodeName nodeType
nodeValue normalize() offsetHeight offsetWidth offsetLeft offsetParent offsetTop
outerHTML outerText ownerDocument parentNode parentElement previousSibling
previousElementSibling querySelector() querySelectorAll() remove()
removeAttribute() removeAttributeNode() removeChild() removeEventListener()
replaceChild() scrollHeight scrollIntoView() scrollLeft scrollTop scrollWidth
setAttribute() setAttributeNode() style tabIndex tagName textContent title
HTML Attributes
getNamedItem() isId item() length name removeNamedItem() setNamedItem()
specified value
HTML Events
abort afterprint animationend animationiteration animationstart beforeprint
beforeunload blur canplay canplaythrough change click contextmenu copy cut
dblclick drag dragend dragenter dragleave dragover dragstart drop durationchange
ended error focus focusin focusout fullscreenchange fullscreenerror hashchange
input invalid keydown keypress keyup load loadeddata loadedmetadata loadstart
message mousedown mouseenter mouseleave mousemove mouseover mouseout mouseup
offline online open pagehide pageshow paste pause play playing progress
ratechange resize reset scroll search seeked seeking select show stalled submit
suspend timeupdate toggle touchcancel touchend touchmove touchstart
transitionend unload volumechange waiting wheel altKey altKey animationName
bubbles button buttons cancelable charCode clientX clientY code ctrlKey ctrlKey
currentTarget data defaultPrevented deltaX deltaY deltaZ deltaMode detail
elapsedTime elapsedTime eventPhase getModifierState() inputType isTrusted key
keyCode location metaKey metaKey newURL oldURL pageX pageY persisted
preventDefault() propertyName relatedTarget relatedTarget screenX screenY
shiftKey shiftKey stopImmediatePropagation() stopPropagation() target
targetTouches timeStamp touches type which which view
HTML Event Objects
AnimationEvent ClipboardEvent DragEvent Event FocusEvent HashChangeEvent
InputEvent KeyboardEvent MouseEvent PageTransitionEvent PopStateEvent
ProgressEvent StorageEvent TouchEvent TransitionEvent UiEvent WheelEvent
HTML Collection
item() length namedItem()
HTML NodeList
entries() forEach() item() keys() length values()
HTML DOMTokenList
add() contains() entries() forEach() item() keys() length remove() replace()
supports() toggle() value values()
HTML Styles
alignContent alignItems alignSelf animation animationDelay animationDirection
animationDuration animationFillMode animationIterationCount animationName
animationTimingFunction animationPlayState background backgroundAttachment
backgroundColor backgroundImage backgroundPosition backgroundRepeat
backgroundClip backgroundOrigin backgroundSize backfaceVisibility border
borderBottom borderBottomColor borderBottomLeftRadius borderBottomRightRadius
borderBottomStyle borderBottomWidth borderCollapse borderColor borderImage
borderImageOutset borderImageRepeat borderImageSlice borderImageSource
borderImageWidth borderLeft borderLeftColor borderLeftStyle borderLeftWidth
borderRadius borderRight borderRightColor borderRightStyle borderRightWidth
borderSpacing borderStyle borderTop borderTopColor borderTopLeftRadius
borderTopRightRadius borderTopStyle borderTopWidth borderWidth bottom boxShadow
boxSizing captionSide caretColor clear clip color columnCount columnFill
columnGap columnRule columnRuleColor columnRuleStyle columnRuleWidth columns
columnSpan columnWidth counterIncrement counterReset cssFloat cursor direction
display emptyCells filter flex flexBasis flexDirection flexFlow flexGrow
flexShrink flexWrap font fontFamily fontSize fontStyle fontVariant fontWeight
fontSizeAdjust height isolation justifyContent left letterSpacing lineHeight
listStyle listStyleImage listStylePosition listStyleType margin marginBottom
marginLeft marginRight marginTop maxHeight maxWidth minHeight minWidth objectFit
objectPosition opacity order orphans outline outlineColor outlineOffset
outlineStyle outlineWidth overflow overflowX overflowY padding paddingBottom
paddingLeft paddingRight paddingTop pageBreakAfter pageBreakBefore
pageBreakInside perspective perspectiveOrigin position quotes resize right
scrollBehavior tableLayout tabSize textAlign textAlignLast textDecoration
textDecorationColor textDecorationLine textDecorationStyle textIndent
textOverflow textShadow textTransform top transform transformOrigin
transformStyle transition transitionProperty transitionDuration
transitionTimingFunction transitionDelay unicodeBidi userSelect verticalAlign
visibility width wordBreak wordSpacing wordWrap widows zIndex



WEB APIS

API Console API Fetch API Fullscreen
exitFullscreen() fullscreenElement fullscreenEnabled() requestFullscreen()
API Geolocation
coordinates getCurrentPosition() position
API History API MediaQueryList API Storage
clear() getItem() key() length removeItem() setItem()
API Validation API Web
crypto.getRandomNumber()



HTML OBJECTS

<a> <abbr> <address> <area> <article> <aside> <audio> <b> <base> <bdo>
<blockquote> <body> <br> <button> <canvas> <caption> <cite> <code> <col>
<colgroup> <datalist> <dd> <del> <details> <dfn> <dialog> <div> <dl> <dt> <em>
<embed> <fieldset> <figcaption> <figure> <footer> <form> <head> <header> <h1> -
<h6> <hr> <html> <i> <iframe> <img> <ins> <input> button <input> checkbox
<input> color <input> date <input> datetime <input> datetime-local <input> email
<input> file <input> hidden <input> image <input> month <input> number <input>
password <input> radio <input> range <input> reset <input> search <input> submit
<input> text <input> time <input> url <input> week <kbd> <label> <legend> <li>
<link> <map> <mark> <menu> <menuitem> <meta> <meter> <nav> <object> <ol>
<optgroup> <option> <output> <p> <param> <pre> <progress> <q> <s> <samp>
<script> <section> <select> <small> <source> <span> <strong> <style> <sub>
<summary> <sup> <table> <tbody> <td> <tfoot> <th> <thead> <tr> <textarea> <time>
<title> <track> <u> <ul> <var> <video>



OTHER REFERENCES

CSSStyleDeclaration
cssText getPropertyPriority() getPropertyValue() item() length parentRule
removeProperty() setProperty()
JS Conversion





JAVASCRIPT TYPED ARRAY REFERENCE

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EXAMPLE

const myArr = new Int8Array(10);
Try it Yourself »


JAVASCRIPT TYPED ARRAYS

In Javascript, a typed array is an array-like buffer of binary data.

There is no JavaScript property or object named TypedArray, but properties and
methods can be used with typed array objects:

--------------------------------------------------------------------------------


TYPED ARRAY OBJECTS

Object Data Type Range Int8Array Signed integer (byte) -128/127 Uint8Array
Unsigned integer (octet) 0/255 Uint8ClampedArray Unsigned integer (octet) 0/255
Int16Array Short integer -32768/32767 Uint16Array Unsigned short integer 0/65535
Int32Array Signed long integer -231/231-1 Uint32Array Unsigned long integer
0/232 Float32Array Float - 7 significant digits 1.2x10-38/3.4x1038 Float64Array
Double - 16 significant digits 5.0x10-324/1.8x10308 BigInt64Array Big signed
integer -263/263-1 BigUint64Array Big unsigned integer 0/264


NOTE

Typed arrays are not arrays.

isArray() on a typed array returns false.

Many array methods (like push and pop) are not supported by typed arrays.

Typed arrays are array-like objects for storing binary data in memory.

--------------------------------------------------------------------------------

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--------------------------------------------------------------------------------


TYPED ARRAY METHODS AND PROPERTIES

Method / Property Description BYTES_PER_ELEMENT Property to count the number of
bytes used to store one element fill() Fill all elements with a value find()
Returns the first element that satisfies a condition name Returns the name of
the typed array of() Method to create a typed array from an array some() Reurns
true if one element satisfies a condition

--------------------------------------------------------------------------------


UINT8ARRAY VS UINT8CLAMPEDARRAY

The difference between an Uint8Array and an Uint8ClampedArray is how values are
added.

If you set one element in an Uint8ClampedArray to a value outside the 0-255
range, it will default to 0 or 255.

A typed array will just take the first 8 bits of the value.

--------------------------------------------------------------------------------


TYPED ARRAY BENEFITS

Typed arrays provide a way to handle binary data as efficiently as arrays work
in C.

Typed arrays are raw memory, so JavaScript can pass them directly to any
function without converting the data to another representation.

Typed arrays are serously faster than normal arrays, for passing data to
functions that can use raw binary data (Computer Games, WebGL, Canvas, File
APIs, Media APIs).

--------------------------------------------------------------------------------


BROWSER APIS SUPPORTING TYPED ARRAYS


FETCH API EXAMPLE

fetch(url)
.then(request => request.arrayBuffer())
.then(arrayBuffer =>...);



CANVAS EXAMPLE

const canvas = document.getElementById('my_canvas');
const context = canvas.getContext('2d');
const imageData = context.getImageData(0, 0, canvas.width, canvas.height);
const uint8ClampedArray = imageData.data;

--------------------------------------------------------------------------------


BROWSER SUPPORT

typedArray is an ECMAScript6 (ES6) feature.

ES6 (JavaScript 2015) is supported in all modern browsers:

Chrome Edge Firefox Safari Opera Yes Yes Yes Yes Yes

typedArray is not supported in Internet Explorer 11 (or earlier).


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