@purtuga/web-components-polyfill-webpack-plugin

A webpack plugin that will wrap your bundles with code that ensure polyfills are loaded first if the browser does not support web components
v2.1.0 URL: https://unpkg.com/@purtuga/web-components-polyfill-webpack-plugin@2.1.0/web-components-polyfill-webpack-plugin.js
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webcomponentsployfillweb componentscustom elementsshadowDOMshadyCSS

@jood/appearer

javascript intersection observer
v0.2.0 URL: https://unpkg.com/@jood/appearer@0.2.0/bundles/jood-appearer.umd.js
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javascripttypescriptintersectionobserverintersection-observeres6ployfill

es5-class-ployfill

Use Class-likely in es5
v0.1.2 URL: https://unpkg.com/es5-class-ployfill@0.1.2/index.js
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es5classployfill