has-tostringtag

What is has-tostringtag?

The `has-tostringtag` npm package is designed to check if the environment has `Symbol.toStringTag` support. This is particularly useful for identifying and working with built-in object tags in a way that's consistent with the ECMAScript specification, especially in environments where this feature might not be available or fully implemented.

What are has-tostringtag's main functionalities?

Checking `Symbol.toStringTag` support

This code checks if the current environment supports `Symbol.toStringTag`. It's useful for determining if you can rely on `Symbol.toStringTag` for identifying object types.

"use strict";\nvar hasToStringTag = require('has-tostringtag');\n\nif (hasToStringTag) {\n  console.log('Environment supports Symbol.toStringTag');\n} else {\n  console.log('Environment does not support Symbol.toStringTag');\n}

Other packages similar to has-tostringtag

core-js

While `core-js` is a much broader polyfill library that includes support for `Symbol.toStringTag` among a vast array of other ECMAScript features, it serves a similar purpose in ensuring environments have access to `Symbol.toStringTag`. Compared to `has-tostringtag`, `core-js` is more comprehensive but also larger in size.

es-abstract

The `es-abstract` package provides utility functions for working with ECMAScript language abstract operations. It includes methods that indirectly relate to `Symbol.toStringTag` by providing a way to work with language internals. Unlike `has-tostringtag`, which is focused on feature detection, `es-abstract` is more about enabling operations that are defined in the ECMAScript specification.

README

has-tostringtag

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

Example

var hasSymbolToStringTag = require('has-tostringtag');

hasSymbolToStringTag() === true; // if the environment has native Symbol.toStringTag support. Not polyfillable, not forgeable.

var hasSymbolToStringTagKinda = require('has-tostringtag/shams');
hasSymbolToStringTagKinda() === true; // if the environment has a Symbol.toStringTag sham that mostly follows the spec.

Supported Symbol shams

• get-own-property-symbols npm | github
• core-js npm | github

Tests

Simply clone the repo, npm install, and run npm test