elint/src/utils/pad-end.js

'use strict'

/**
 * polyfill String.prototype.padEnd
 *
 * @param {number} targetLength padding length
 * @returns {string} string
 */
/* istanbul ignore next */
function polyfill (targetLength) {
  const length = this.length

  if (targetLength <= length) {
    return this
  }

  return `${this}${' '.repeat(targetLength - length)}`
}

/**
 * String.prototype.padEnd
 *
 * @param {string} string string
 * @param {number} targetLength padding length
 * @returns {string} string
 */
function padEnd (string, targetLength) {
  if (typeof string !== 'string' ||
    typeof targetLength !== 'number') {
    return string
  }

  /* istanbul ignore next */
  const fn = typeof String.prototype.padEnd === 'function'
    ? String.prototype.padEnd
    : polyfill

  return fn.call(string, targetLength)
}

module.exports = padEnd