Sign Up for Free

RunKit +

Try any Node.js package right in your browser

This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 1,000,000+ packages pre-installed, including string.prototype.trimleft with all npm packages installed. Try it out:

var stringPrototypeTrimleft = require("string.prototype.trimleft")

This service is provided by RunKit and is not affiliated with npm, Inc or the package authors.

string.prototype.trimleft v2.1.2

ES2019 spec-compliant String.prototype.trimLeft shim.

String.prototype.trimLeft Version Badge

Build Status dependency status dev dependency status License Downloads

npm badge

browser support

An ES2019-spec-compliant String.prototype.trimLeft shim. Invoke its "shim" method to shim String.prototype.trimLeft if it is unavailable.

This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec. In an ES6 environment, it will also work properly with Symbols.

Most common usage:

var trimLeft = require('string.prototype.trimleft');

assert(trimLeft(' \t\na \t\n') === 'a \t\n');

if (!String.prototype.trimLeft) {

assert(trimLeft(' \t\na \t\n') === ' \t\na \t\n'.trimLeft());


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

RunKit is a free, in-browser JavaScript dev environment for prototyping Node.js code, with every npm package installed. Sign up to share your code.
Sign Up for Free