ltrim.js 361 B

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  1. import assertString from './util/assertString';
  2. export default function ltrim(str, chars) {
  3. assertString(str);
  4. // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#Escaping
  5. var pattern = chars ? new RegExp("^[".concat(chars.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'), "]+"), 'g') : /^\s+/g;
  6. return str.replace(pattern, '');
  7. }