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tslib

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tslib

Runtime library for TypeScript helper functions

    2.4.0latest

Version published
Maintainers
8
Weekly downloads
121,134,641
decreased by-5.06%

Weekly downloads

Changelog

Source

tslib 2.4.0

This release includes the __classPrivateFieldIn helper as well as an update to __createBinding to reduce indirection between multiple re-exports.

Readme

Source

tslib

This is a runtime library for TypeScript that contains all of the TypeScript helper functions.

This library is primarily used by the --importHelpers flag in TypeScript. When using --importHelpers, a module that uses helper functions like __extends and __assign in the following emitted file:

var __assign = (this && this.__assign) || Object.assign || function(t) { for (var s, i = 1, n = arguments.length; i < n; i++) { s = arguments[i]; for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p]; } return t; }; exports.x = {}; exports.y = __assign({}, exports.x);

will instead be emitted as something like the following:

var tslib_1 = require("tslib"); exports.x = {}; exports.y = tslib_1.__assign({}, exports.x);

Because this can avoid duplicate declarations of things like __extends, __assign, etc., this means delivering users smaller files on average, as well as less runtime overhead. For optimized bundles with TypeScript, you should absolutely consider using tslib and --importHelpers.

Installing

For the latest stable version, run:

npm

# TypeScript 3.9.2 or later npm install tslib # TypeScript 3.8.4 or earlier npm install [email protected]^1 # TypeScript 2.3.2 or earlier npm install [email protected]1.6.1

yarn

# TypeScript 3.9.2 or later yarn add tslib # TypeScript 3.8.4 or earlier yarn add [email protected]^1 # TypeScript 2.3.2 or earlier yarn add [email protected]

bower

# TypeScript 3.9.2 or later bower install tslib # TypeScript 3.8.4 or earlier bower install [email protected]^1 # TypeScript 2.3.2 or earlier bower install [email protected]1.6.1

JSPM

# TypeScript 3.9.2 or later jspm install tslib # TypeScript 3.8.4 or earlier jspm install [email protected]^1 # TypeScript 2.3.2 or earlier jspm install [email protected]1.6.1

Usage

Set the importHelpers compiler option on the command line:

tsc --importHelpers file.ts

or in your tsconfig.json:

{ "compilerOptions": { "importHelpers": true } }
For bower and JSPM users

You will need to add a paths mapping for tslib, e.g. For Bower users:

{ "compilerOptions": { "module": "amd", "importHelpers": true, "baseUrl": "./", "paths": { "tslib" : ["bower_components/tslib/tslib.d.ts"] } } }

For JSPM users:

{ "compilerOptions": { "module": "system", "importHelpers": true, "baseUrl": "./", "paths": { "tslib" : ["jspm_packages/npm/[email protected]/tslib.d.ts"] } } }

Deployment

  • Choose your new version number
  • Set it in package.json and bower.json
  • Create a tag: git tag [version]
  • Push the tag: git push --tags
  • Create a release in GitHub
  • Run the publish to npm workflow

Done.

Contribute

There are many ways to contribute to TypeScript.

Documentation

Keywords

FAQs

What is tslib?

Runtime library for TypeScript helper functions

Is tslib popular?

The npm package tslib receives a total of 97,116,489 weekly downloads. As such, tslib popularity was classified as popular.

Is tslib well maintained?

We found that tslib demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago.It has 8 open source maintainers collaborating on the project.

Last updated on 22 Apr 2022
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