StringPaddingBuiltinsImpl.jsā¢876 B
'use strict';
var $TypeError = require('es-errors/type');
var StringPad = require('./StringPad');
var ToLength = require('./ToLength');
var ToString = require('./ToString');
// https://262.ecma-international.org/15.0/#sec-stringpaddingbuiltinsimpl
module.exports = function StringPaddingBuiltinsImpl(O, maxLength, fillString, placement) {
if (placement !== 'start' && placement !== 'end' && placement !== 'START' && placement !== 'END') {
throw new $TypeError('Assertion failed: `placement` must be ~START~ or ~END~');
}
var S = ToString(O); // step 1
var intMaxLength = ToLength(maxLength); // step 2
var stringLength = S.length; // step 3
if (intMaxLength <= stringLength) { return S; } // step 4
var filler = typeof fillString === 'undefined' ? ' ' : ToString(fillString); // steps 5-6
return StringPad(S, intMaxLength, filler, placement); // step 7
};