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Gathering detailed insights and metrics for @webcomponents/webcomponentsjs

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webcomponents.js

Gathering detailed insights and metrics for @webcomponents/webcomponentsjs

@webcomponents/webcomponentsjs

Web Components Polyfills

2.8.0

1,146

BSD-3-Clause

HTML

35.71 kB

56,412,365 4.3

Installations

npm install @webcomponents/webcomponentsjs

Pull Requests

Open

43

Total

289

Closed

58

Merged

188

Issues

Open

163

Total

304

Closed

141

Releases

Unable to fetch releases

Developer

webcomponents

Developer Guide

BETA

Module System

CommonJS

Min. Node Version

Typescript Support

Yes

Node Version

19.8.1

NPM Version

9.5.1 Statistics

1,146 Stars

4,268 Commits

165 Forks

35 Watching

66 Branches

119 Contributors

Updated on 14 Nov 2024

Bundle Size

124.54 kB

Minified

35.71 kB

Minified + Gzipped

Bundlephobia

Languages

HTML (61.96%)

JavaScript (28.06%)

TypeScript (9.77%)

CSS (0.21%)

Total Downloads

Cumulative downloads

Total Downloads

56,412,365

Last day

0.8%

38,589

Compared to previous day

Last week

3.7%

204,626

Compared to previous week

Last month

3.3%

864,982

Compared to previous month

Last year

-12.9%

10,462,069

Compared to previous year

Daily Downloads

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dev Dependencies

gulp-concat promise-polyfill @webcomponents/url babel-preset-minify @webcomponents/shadycss @webcomponents/shadydom @webcomponents/template get-own-property-symbols @webcomponents/custom-elements

Versions

Web Components Polyfills

Getting Started | Usage | Packages | Roadmap

The Web Components polyfills are a suite of JavaScript libraries that implement Web Components APIs for browsers that don't have built-in support.

If you use Custom Elements, Shadow DOM, or the <template> element, either directly or through a library like LitElement, then you can use these polyfills to make your app work in older browsers like IE11.

We're also working on polyfills for cutting edge new APIs for Web Components that aren't built into all modern browsers yet, like Shadow Parts and Adopted Stylesheets.

Getting Started

Install the webcomponentsjs package to get all of the Web Components polyfills and a loader that automatically downloads only the polyfills each browser needs:

1npm install --save @webcomponents/webcomponentsjs

Load the polyfills loader before any of your application code:

1<html>
2  <head>
3    <!-- If your application is compiled to ES5, then load this script first. -->
4    <script src="./node_modules/@webcomponents/webcomponentsjs/custom-elements-es5-adapter.js"></script>
5
6    <!-- Add support for Web Components to older browsers. -->
7    <script src="./node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
8
9    <!-- Load your application code anytime after loader.js -->
10  </head>
11  <body>
12    <!-- Your custom elements will work in older browsers like IE11. -->
13    <my-custom-element></my-custom-element>
14  </body>
15</html>

For more ways to load the Web Components polyfills, see the webcomponentsjs package.

Usage

The Web Components polyfills handle many usage patterns automatically, but there are certain patterns that require direct interaction with the library:

Setting Custom Properties

To set a CSS custom property value imperatively, pass the value to styleSubtree.
To re-compute CSS custom properties after a DOM mutuation that affects the matching condition of a CSS rule containing a custom property (e.g. changing a class attribute), call styleSubtree.

Registering styles

To use a style in the main document that sets or consumes a CSS Custom Property, register it with addCustomStyle.
To use a style in a Custom Element, pass the element's template to prepareTemplate before first cloning it. (Note that LitElement and the Polymer Library perform this registration step automatically.)

Packages

This repo is a monorepo. Each package lives under packages/<package>.

webcomponentsjs

Documentation | Changelog | Issues

Loader and pre-minimized bundles for the full suite of Web Components polyfills.

Most users only need to install this package, but it is also possible to separately install any of the individual polyfills listed below.

custom-elements

Documentation | Changelog | Issues

Polyfill for Custom Elements (MDN, Spec)

template

Documentation | Changelog | Issues

Polyfill for Template Element (MDN, Spec)

shadydom

Documentation | Changelog | Issues

Polyfill for Shadow DOM (MDN, Spec)

shadycss

Documentation | Changelog | Issues

Polyfill for Scoped CSS (Spec)

html-imports

Documentation | Changelog | Issues

Polyfill for HTML Imports (Spec)

Note that HTML Imports are deprecated in favor of JavaScript modules. As of Chrome 81, HTML Imports are no longer natively supported by any browser. The current version of the Web Components loader does not automatically polyfill HTML Imports. Applications that still depend on HTML Imports are recommended to install @webcomponents/html-imports and load it separately.

Roadmap

The following APIs are on the roadmap for 2020:

CSS Shadow Parts (MDN, Spec). Follow Issue #252.
Constructable & Adopted Stylesheets (Spec, Explainer, Article). Follow Issue #44.
FormData event (Spec, Explainer). Follow Issue #172.
Form Associated Custom Elements (Spec, Explainer). Follow Issue #173.

No vulnerabilities found.

10

Security-Policy

Determines if the project has published a security policy.

10

Dangerous-Workflow

Determines if the project's GitHub Action workflows avoid dangerous patterns.

10

Binary-Artifacts

Determines if the project has generated executable (binary) artifacts in the source repository.

10

License

Determines if the project has defined a license.

6

Code-Review

Determines if the project requires human code review before pull requests (aka merge requests) are merged.

3

Maintained

Determines if the project is "actively maintained".

3

Pinned-Dependencies

Determines if the project has declared and pinned the dependencies of its build process.

2

SAST

Determines if the project uses static code analysis.

0

Token-Permissions

Determines if the project's workflows follow the principle of least privilege.

0

CII-Best-Practices

Determines if the project has an OpenSSF (formerly CII) Best Practices Badge.

0

Fuzzing

Determines if the project uses fuzzing.

0

Branch-Protection

Determines if the default and release branches are protected with GitHub's branch protection settings.

0

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

Reason

75 existing vulnerabilities detected

Details

Warn: Project is vulnerable to: GHSA-67hx-6x53-jw92
Warn: Project is vulnerable to: GHSA-cph5-m8f7-6c5x
Warn: Project is vulnerable to: GHSA-wf5p-g6vw-rhxx
Warn: Project is vulnerable to: GHSA-qwcr-r2fm-qrc7
Warn: Project is vulnerable to: GHSA-cwfw-4gq5-mrqx
Warn: Project is vulnerable to: GHSA-g95f-p29q-9xw4
Warn: Project is vulnerable to: GHSA-grv7-fg5c-xmjg
Warn: Project is vulnerable to: GHSA-pxg6-pf52-xh8x
Warn: Project is vulnerable to: GHSA-3xgq-45jj-v275
Warn: Project is vulnerable to: GHSA-9vvw-cc9w-f27h
Warn: Project is vulnerable to: GHSA-gxpj-cx7g-858c
Warn: Project is vulnerable to: GHSA-wm7h-9275-46v2
Warn: Project is vulnerable to: GHSA-h6ch-v84p-w6p9
Warn: Project is vulnerable to: GHSA-4gmj-3p3h-gm8h
Warn: Project is vulnerable to: GHSA-rv95-896h-c2vc
Warn: Project is vulnerable to: GHSA-qw6h-vgh9-j6wx
Warn: Project is vulnerable to: GHSA-jchw-25xp-jwwc
Warn: Project is vulnerable to: GHSA-cxjh-pqwp-8mfp
Warn: Project is vulnerable to: GHSA-pfrx-2q88-qq97
Warn: Project is vulnerable to: GHSA-qh2h-chj9-jffq
Warn: Project is vulnerable to: GHSA-pfq8-rq6v-vf5m
Warn: Project is vulnerable to: GHSA-rc47-6667-2j5j
Warn: Project is vulnerable to: GHSA-c7qv-q95q-8v27
Warn: Project is vulnerable to: GHSA-78xj-cgh5-2h22
Warn: Project is vulnerable to: GHSA-2p57-rm9w-gvfp
Warn: Project is vulnerable to: GHSA-9c47-m6qq-7p4h
Warn: Project is vulnerable to: GHSA-7h8x-wmq2-7mff
Warn: Project is vulnerable to: GHSA-jf85-cpcp-j695
Warn: Project is vulnerable to: GHSA-fvqr-27wr-82fm
Warn: Project is vulnerable to: GHSA-4xc9-xhrj-v574
Warn: Project is vulnerable to: GHSA-x5rq-j2xg-h7qm
Warn: Project is vulnerable to: GHSA-p6mc-m468-83gw
Warn: Project is vulnerable to: GHSA-29mw-wpgm-hmr9
Warn: Project is vulnerable to: GHSA-35jh-r3h4-6jhm
Warn: Project is vulnerable to: GHSA-952p-6rrq-rcjv
Warn: Project is vulnerable to: GHSA-vh95-rmgr-6w4m / GHSA-xvch-5gv4-984h
Warn: Project is vulnerable to: GHSA-8hfj-j24r-96c4
Warn: Project is vulnerable to: GHSA-wc69-rhjr-hc9g
Warn: Project is vulnerable to: GHSA-3j8f-xvm3-ffx4
Warn: Project is vulnerable to: GHSA-j9fq-vwqv-2fm2
Warn: Project is vulnerable to: GHSA-pqw5-jmp5-px4v
Warn: Project is vulnerable to: GHSA-9wv6-86v2-598j
Warn: Project is vulnerable to: GHSA-4cpg-3vgw-4877
Warn: Project is vulnerable to: GHSA-p8p7-x288-28g6
Warn: Project is vulnerable to: GHSA-x3m3-4wpv-5vgc
Warn: Project is vulnerable to: GHSA-gcx4-mw62-g8wm
Warn: Project is vulnerable to: GHSA-c2qf-rxjj-qqgw
Warn: Project is vulnerable to: GHSA-m6fv-jmcg-4jfg
Warn: Project is vulnerable to: GHSA-cm22-4g7w-348p
Warn: Project is vulnerable to: GHSA-25hc-qcg6-38wj
Warn: Project is vulnerable to: GHSA-cqmj-92xf-r6r9
Warn: Project is vulnerable to: GHSA-f5x3-32g6-xq36
Warn: Project is vulnerable to: GHSA-72xf-g2v4-qvf3
Warn: Project is vulnerable to: GHSA-7p7h-4mm5-852v
Warn: Project is vulnerable to: GHSA-cf4h-3jhx-xvhq
Warn: Project is vulnerable to: GHSA-j8xg-fqg3-53r7
Warn: Project is vulnerable to: GHSA-3h5v-q93c-6h6q
Warn: Project is vulnerable to: GHSA-h6q6-9hqw-rwfv
Warn: Project is vulnerable to: GHSA-5fg8-2547-mr8q
Warn: Project is vulnerable to: GHSA-crh6-fp67-6883
Warn: Project is vulnerable to: GHSA-28mc-g557-92m7
Warn: Project is vulnerable to: GHSA-f8q6-p94x-37v3
Warn: Project is vulnerable to: GHSA-897m-rjf5-jp39
Warn: Project is vulnerable to: GHSA-w573-4hg7-7wgq
Warn: Project is vulnerable to: GHSA-4q6p-r6v2-jvc5
Warn: Project is vulnerable to: GHSA-43f8-2h32-f4cj
Warn: Project is vulnerable to: GHSA-qqgx-2p2h-9c37
Warn: Project is vulnerable to: GHSA-3jfq-g458-7qm9
Warn: Project is vulnerable to: GHSA-r628-mhmh-qjhw
Warn: Project is vulnerable to: GHSA-9r2w-394v-53qc
Warn: Project is vulnerable to: GHSA-5955-9wpr-37jh
Warn: Project is vulnerable to: GHSA-qq89-hq3f-393p
Warn: Project is vulnerable to: GHSA-fhg7-m89q-25r3
Warn: Project is vulnerable to: GHSA-c4w7-xm78-47vh
Warn: Project is vulnerable to: GHSA-p9pc-299p-vxgp

Score

4.3

/10

Last Scanned on 2024-11-18

The Open Source Security Foundation is a cross-industry collaboration to improve the security of open source software (OSS). The Scorecard provides security health metrics for open source projects.

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