voca/es/trim_left.js

The ultimate JavaScript string library

import { i as isNil } from './internal/is_nil.js';
import './is_string.js';
import { c as coerceToString } from './internal/coerce_to_string.js';
import { j as REGEXP_TRIM_LEFT } from './internal/const.js';
import { t as toString } from './internal/to_string.js';
import './internal/to_integer.js';
import includes from './includes.js';

var reduce = Array.prototype.reduce;
/**
 * Removes whitespaces from the left side of the `subject`.
 *
 * @function trimLeft
 * @static
 * @since 1.0.0
 * @memberOf Manipulate
 * @param {string} [subject=''] The string to trim.
 * @param {string} [whitespace=whitespace] The whitespace characters to trim. List all characters that you want to be stripped.
 * @return {string} Returns the trimmed string.
 * @example
 * v.trimLeft('  Starship Troopers');
 * // => 'Starship Troopers'
 *
 * v.trimLeft('***Mobile Infantry', '*');
 * // => 'Mobile Infantry'
 */

function trimLeft(subject, whitespace) {
  var subjectString = coerceToString(subject);

  if (whitespace === '' || subjectString === '') {
    return subjectString;
  }

  var whitespaceString = toString(whitespace);

  if (isNil(whitespaceString)) {
    return subjectString.replace(REGEXP_TRIM_LEFT, '');
  }

  var matchWhitespace = true;
  return reduce.call(subjectString, function (trimmed, character) {
    if (matchWhitespace && includes(whitespaceString, character)) {
      return trimmed;
    }

    matchWhitespace = false;
    return trimmed + character;
  }, '');
}

export default trimLeft;