error-ex

Easy error subclassing and stack customization

v1.3.4 URL: https://unpkg.com/error-ex@1.3.4/index.js

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error errors extend extending extension subclass stack custom

make-error

Make your own error types!

v1.3.6 URL: https://unpkg.com/make-error@1.3.6/index.js

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create custom derive error errors extend extending extension factory inherit make subclass

verror

richer JavaScript errors

v1.10.1 URL: https://unpkg.com/verror@1.10.1/lib/verror.js

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error errors err exception exceptions custom

emoji-picker-element

Lightweight emoji picker distributed as a web component

v1.28.0 URL: https://unpkg.com/emoji-picker-element@1.28.0/index.js

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emoji picker IndexedDB custom element web component

postcss-custom-selectors

Use Custom Selectors in CSS

v8.0.5 URL: https://unpkg.com/postcss-custom-selectors@8.0.5/dist/index.cjs

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at-rule atrule css csswg custom declarative extensions postcss postcss-plugin rule selectors specification w3c