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    tslib
    TypeScript icon, indicating that this package has built-in type declarations

    2.4.0 • Public • Published

    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 tslib@^1
    
    # TypeScript 2.3.2 or earlier
    npm install tslib@1.6.1

    yarn

    # TypeScript 3.9.2 or later
    yarn add tslib
    
    # TypeScript 3.8.4 or earlier
    yarn add tslib@^1
    
    # TypeScript 2.3.2 or earlier
    yarn add tslib@1.6.1

    bower

    # TypeScript 3.9.2 or later
    bower install tslib
    
    # TypeScript 3.8.4 or earlier
    bower install tslib@^1
    
    # TypeScript 2.3.2 or earlier
    bower install tslib@1.6.1

    JSPM

    # TypeScript 3.9.2 or later
    jspm install tslib
    
    # TypeScript 3.8.4 or earlier
    jspm install tslib@^1
    
    # TypeScript 2.3.2 or earlier
    jspm install tslib@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/tslib@2.x.y/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

    Install

    npm i tslib

    DownloadsWeekly Downloads

    114,642,137

    Version

    2.4.0

    License

    0BSD

    Unpacked Size

    50 kB

    Total Files

    11

    Last publish

    Collaborators

    • typescript-bot
    • weswigham
    • sanders_n
    • andrewbranch
    • minestarks
    • rbuckton
    • sheetalkamat
    • typescript-deploys