launchdarkly.com Open in urlscan Pro
199.232.194.22  Public Scan

Submitted URL: https://em.launchdarkly.com/dc/3xbM4tQLBeNyhupI5OyGys_6BA3nuo-RTkntzDwVTUnWBKSmprZpBlPYhvq7QM3qfPHSEwNX6FWqnoZGVltgkRpQHz_3p...
Effective URL: https://launchdarkly.com/blog/best-practices-for-coding-with-feature-flags/?utm_source=marketo&utm_medium=email&utm_campa...
Submission: On July 12 via api from FR — Scanned from FR

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keyval-store#keyvalUsed to maintain visitors' preferences throughout the visit
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lang [x2]Remembers the user's selected language version of a website
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loglevelMaintains settings and outputs when using the Developer Tools Console on
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wistia-video-progress-#Contains a timestamp for the website’s video-content.
This allows the user to resume watching without having to start over, if the
user leaves the video or website.
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_dd_sRegisters the website's speed and performance. This function can be used in
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_hjSessionUser_#Collects statistics on the visitor's visits to the website, such
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ubvtCollects data on the user's visits to the website, such as the number of
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cookie roots from Wistia, which provides video-software to websites.
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_biz_pendingACollects data on visitors' preferences and behaviour on the website
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specific visitor.
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barometric[cuid]Collects data on visitors. This information is used to assign
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IDEUsed by Google DoubleClick to register and report the website user's actions
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pagead/landing [x2]Collects data on visitor behaviour from multiple websites, in
order to present more relevant advertisement - This also allows the website to
limit the number of times that they are shown the same advertisement.
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pagead/viewthroughconversion/960335887Pending
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ads/ga-audiencesUsed by Google AdWords to re-engage visitors that are likely to
convert to customers based on the visitor's online behaviour across websites.
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pagead/1p-user-list/#Tracks if the user has shown interest in specific products
or events across multiple websites and detects how the user navigates between
sites. This is used for measurement of advertisement efforts and facilitates
payment of referral-fees between websites.
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_gcl_auUsed by Google AdSense for experimenting with advertisement efficiency
across websites using their services.
Expiry: 3 monthsType: HTTP
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__tld__Used to track visitors on multiple websites, in order to present relevant
advertisement based on the visitor's preferences.
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_rdt_uuidUsed to track visitors on multiple websites, in order to present
relevant advertisement based on the visitor's preferences.
Expiry: 3 monthsType: HTTP
_uetsidCollects data on visitor behaviour from multiple websites, in order to
present more relevant advertisement - This also allows the website to limit the
number of times that they are shown the same advertisement.
Expiry: 1 dayType: HTTP
_uetvidUsed to track visitors on multiple websites, in order to present relevant
advertisement based on the visitor's preferences.
Expiry: 1 yearType: HTTP
ajs_user_idCollects data on visitors' preferences and behaviour on the website -
This information is used make content and advertisement more relevant to the
specific visitor.
Expiry: PersistentType: HTML
amplitude_cookie_testDetects whether partner data synchronization is functioning
and currently running - This function sends user data between third-party
advertisement companies for the purpose of targeted advertisements.
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bcookieUsed by the social networking service, LinkedIn, for tracking the use of
embedded services.
Expiry: 2 yearsType: HTTP
bscookieUsed by the social networking service, LinkedIn, for tracking the use of
embedded services.
Expiry: 2 yearsType: HTTP
lidcUsed by the social networking service, LinkedIn, for tracking the use of
embedded services.
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request forgery. This cookie is essential for the security of the website and
visitor.
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website to target visitors via email.
Expiry: 2 yearsType: HTTP
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frUsed by Facebook to deliver a series of advertisement products such as real
time bidding from third party advertisers.
Expiry: 3 monthsType: HTTP
trUsed by Facebook to deliver a series of advertisement products such as real
time bidding from third party advertisers.
Expiry: SessionType: Pixel
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_/ad/75aa344edeef4dbfa3b3dd7cb5f40e6f/pixelCollects data on user behaviour and
interaction in order to optimize the website and make advertisement on the
website more relevant.
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WIDGET::local::assignmentsUsed by audio-platform SoundCloud to implement,
measure and improve their embedded content/service on the website - The
collection of data also includes visitors’ interaction with embedded
content/service. This can be used for statistics or marketing purposes.
Expiry: PersistentType: HTML
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i/adsct [x2]The cookie is used by Twitter.com in order to determine the number
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muc_adsCollects data on user behaviour and interaction in order to optimize the
website and make advertisement on the website more relevant.
Expiry: 2 yearsType: HTTP
YouTube
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VISITOR_INFO1_LIVETries to estimate the users' bandwidth on pages with
integrated YouTube videos.
Expiry: 179 daysType: HTTP
YSCRegisters a unique ID to keep statistics of what videos from YouTube the user
has seen.
Expiry: SessionType: HTTP
ytidb::LAST_RESULT_ENTRY_KEYStores the user's video player preferences using
embedded YouTube video
Expiry: PersistentType: HTML
b.6sc.co
1
v1/beacon/img.gifUsed in context with Account-Based-Marketing (ABM). The cookie
registers data such as IP-addresses, time spent on the website and page requests
for the visit. This is used for retargeting of multiple users rooting from the
same IP-addresses. ABM usually facilitates B2B marketing purposes.
Expiry: SessionType: Pixel
cdn.bizible.com
cdn.bizibly.com

2
_BUID [x2]Collects data on visitors' preferences and behaviour on the website -
This information is used make content and advertisement more relevant to the
specific visitor.
Expiry: 1 yearType: HTTP
j.6sc.co
4
_an_uidPresents the user with relevant content and advertisement. The service is
provided by third-party advertisement hubs, which facilitate real-time bidding
for advertisers.
Expiry: 6 daysType: HTTP
_gd_sessionCollects visitor data related to the user's visits to the website,
such as the number of visits, average time spent on the website and what pages
have been loaded, with the purpose of displaying targeted ads.
Expiry: 1 dayType: HTTP
_gd_svisitorCollects visitor data related to the user's visits to the website,
such as the number of visits, average time spent on the website and what pages
have been loaded, with the purpose of displaying targeted ads.
Expiry: 2 yearsType: HTTP
_gd_visitorCollects visitor data related to the user's visits to the website,
such as the number of visits, average time spent on the website and what pages
have been loaded, with the purpose of displaying targeted ads.
Expiry: 2 yearsType: HTTP
Unclassified 12
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Airtable
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internal/page_viewPending
Expiry: SessionType: Pixel
Cvent
5
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dd_cookie_test_#Pending
Expiry: 1 dayType: HTTP
eventguestside-service-sessionPending
Expiry: SessionType: HTTP
registration-1b38b19d-e697-4c72-bb50-e666089ab6e5Pending
Expiry: PersistentType: HTML
registration-34ba815c-7d88-43d4-9bd8-2f5b679254d0Pending
Expiry: PersistentType: HTML
registration-7968024f-e89a-457f-a705-83506828faafPending
Expiry: PersistentType: HTML
LaunchDarkly
4
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amplitude_id_#Pending
Expiry: 10 yearsType: HTTP
ld:#:#Pending
Expiry: PersistentType: HTML
ld:#:$diagnosticsPending
Expiry: PersistentType: HTML
ld:$anonUserIdPending
Expiry: PersistentType: HTML
js.qualified.com
2
__q_domainTestPending
Expiry: SessionType: HTTP
__q_state_BN8NXAwRcuN5KnVdPending
Expiry: 10 yearsType: HTTP
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BEST PRACTICES


BEST PRACTICES FOR CODING WITH FEATURE FLAGS


By Yoz Grahame   •   October 28, 2020
1 min read

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Code is a fragile, temperamental material. Engineers don’t just need a program
to function correctly; it should also be easy to read and easy to change. These
requirements often conflict with each other, and those conflicts cause much of
the difficulty inherent in software engineering.

LaunchDarkly’s core message is that feature flags significantly reduce the risk
and pain of working with code. But that reduction doesn’t happen automatically.
If used incorrectly, flags may add complexity and fragility to your codebase.

To help developers use flags more effectively, we’ve written a short best
practice guide: Improving flag usage in code. It features tips for:

 * designing component interfaces for flag-evaluating code
 * easier flag removal with fewer merge conflicts
 * defending against consistency problems

The Guides section of our Documentation site is a growing collection of best
practices from our Developer Advocates. It includes recommendations for creating
flags, deployment and release strategies, and reducing technical debt. There are
also tutorials that will walk you through different uses of LaunchDarkly, such
as targeting and experimentation.

We’re constantly updating and expanding our Guides. If you’re looking for the
best way to use LaunchDarkly in your app, check them out.



By Yoz Grahame

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