err-code

Create an error with a code

v3.0.1 URL: https://unpkg.com/err-code@3.0.1/index.js

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error err code properties property

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

@stdlib/error-tools-fmtprodmsg

Format an error message for production.

v0.2.2 URL: https://unpkg.com/@stdlib/error-tools-fmtprodmsg@0.2.2/lib/index.js

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stdlib stdutils stdutil utils util utilities utility error err message msg format fmt minify minification

@stdlib/assert-is-error

Test if a value is an Error object.

v0.2.2 URL: https://unpkg.com/@stdlib/assert-is-error@0.2.2/lib/index.js

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stdlib stdassert assertion assert utilities utility utils util error err exception is iserr iserror valid isvalid type check validate validation test

happy-rusty

Porting some excellent design implementations from Rust to JavaScript.

v1.5.0 URL: https://unpkg.com/happy-rusty@1.5.0/dist/main.cjs

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rust enum Option Some None Result Ok Err