| Leo Repp | 58b9f11 | 2021-11-22 11:57:47 +0100 | [diff] [blame^] | 1 | 'use strict'; |
| 2 | |
| 3 | var trimStart = require('string.prototype.trimstart'); |
| 4 | var trimEnd = require('string.prototype.trimend'); |
| 5 | |
| 6 | var GetIntrinsic = require('get-intrinsic'); |
| 7 | |
| 8 | var $TypeError = GetIntrinsic('%TypeError%'); |
| 9 | |
| 10 | var RequireObjectCoercible = require('./RequireObjectCoercible'); |
| 11 | var ToString = require('./ToString'); |
| 12 | |
| 13 | // https://262.ecma-international.org/10.0/#sec-trimstring |
| 14 | |
| 15 | module.exports = function TrimString(string, where) { |
| 16 | var str = RequireObjectCoercible(string); |
| 17 | var S = ToString(str); |
| 18 | var T; |
| 19 | if (where === 'start') { |
| 20 | T = trimStart(S); |
| 21 | } else if (where === 'end') { |
| 22 | T = trimEnd(S); |
| 23 | } else if (where === 'start+end') { |
| 24 | T = trimStart(trimEnd(S)); |
| 25 | } else { |
| 26 | throw new $TypeError('Assertion failed: invalid `where` value; must be "start", "end", or "start+end"'); |
| 27 | } |
| 28 | return T; |
| 29 | }; |