ramda-adjunct/src/internal/polyfills/String.padEnd.js

Ramda Adjunct is the most popular and most comprehensive set of utilities for use with Ramda, providing a variety of useful, well tested functions with excellent documentation.

import isFunction from '../../isFunction';
import isNotUndefined from '../../isNotUndefined';
import repeat from './String.repeat';

const padEndPolyfill = (padString, targetLength, value) => {
  // eslint-disable-next-line no-bitwise
  let finalLength = targetLength >> 0;
  let finalPadString = String(isNotUndefined(padString) ? padString : ' ');

  if (value.length > finalLength) {
    return String(value);
  }

  finalLength -= value.length;
  if (finalLength > finalPadString.length) {
    const remainingLength = finalLength / finalPadString.length;
    finalPadString += isFunction(String.prototype.repeat)
      ? finalPadString.repeat(remainingLength)
      : repeat(finalPadString, remainingLength);
  }

  return String(value) + finalPadString.slice(0, finalLength);
};

export default padEndPolyfill;