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string.prototype.trim

String.prototype.trim Version Badge

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An ES5 spec-compliant String.prototype.trim shim. Invoke its "shim" method to shim String.prototype.trim if it is unavailable.

This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec.

Most common usage:

var assert = require('assert');
var trim = require('string.prototype.trim');
 
assert(trim(' \t\n\t\n') === 'a');
 
trim.shim(); // will be a no-op if not needed 
 
assert(trim(' \t\n\t\n') === ' \t\n\t\n'.trim());

Engine Bugs

Some implementations of String#trim incorrectly trim zero-width spaces. This shim detects and corrects this behavior.

Tests

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