source: frontend/node_modules/es-abstract/2020/TrimString.js

'use strict';

var trimStart = require('string.prototype.trimstart');
var trimEnd = require('string.prototype.trimend');

var $TypeError = require('es-errors/type');

var RequireObjectCoercible = require('./RequireObjectCoercible');
var ToString = require('./ToString');

// https://262.ecma-international.org/10.0/#sec-trimstring

module.exports = function TrimString(string, where) {
        var str = RequireObjectCoercible(string);
        var S = ToString(str);
        var T;
        if (where === 'start') {
                T = trimStart(S);
        } else if (where === 'end') {
                T = trimEnd(S);
        } else if (where === 'start+end') {
                T = trimStart(trimEnd(S));
        } else {
                throw new $TypeError('Assertion failed: invalid `where` value; must be "start", "end", or "start+end"');
        }
        return T;
};