error-ex

Easy error subclassing and stack customization

v1.3.2 URL: https://unpkg.com/error-ex@1.3.2/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

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

postcss-custom-media

Use Custom Media Queries in CSS

v11.0.6 URL: https://unpkg.com/postcss-custom-media@11.0.6/dist/index.cjs

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at-rule atrule css csswg custom media postcss postcss-plugin queries query specification w3c