es-to-primitive

ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.

v1.3.0 URL: https://unpkg.com/es-to-primitive@1.3.0/index.js

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primitive abstract ecmascript es5 es6 es2015 toPrimitive coerce type object string number boolean symbol null undefined

has-tostringtag

Determine if the JS environment has `Symbol.toStringTag` support. Supports spec, or shams.

v1.0.2 URL: https://unpkg.com/has-tostringtag@1.0.2/index.js

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javascript ecmascript symbol symbols tostringtag Symbol.toStringTag

is-symbol

Determine if a value is an ES6 Symbol or not.

v1.1.1 URL: https://unpkg.com/is-symbol@1.1.1/index.js

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symbol es6 is Symbol

figures

Unicode symbols with fallbacks for older terminals

v6.1.0 URL: https://unpkg.com/figures@6.1.0/index.js

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unicode cli cmd command-line characters symbol symbols figure figures fallback

symbol-observable

Symbol.observable ponyfill

v4.0.0 URL: https://unpkg.com/symbol-observable@4.0.0/lib/index.js

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symbol observable observables ponyfill polyfill shim