iframe-proxy | Sunbelt Computer Software

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// Inspiration: https://github.com/facebook/react/issues/3386
function replace (string, regexpOrSubstr, newValueOrFn, globalOffset) {
	if (typeof string !== 'string') throw new Error('First param must be a string')
	if (typeof regexpOrSubstr !== 'string' && !(regexpOrSubstr instanceof RegExp)) throw new Error('Second param must be a string pattern or a regular expression')
	var fn = (typeof regexpOrSubstr === 'string') ? replaceUsingString : replaceUsingRegexp
	return fn(string, regexpOrSubstr, newValueOrFn, globalOffset)
function replaceUsingString (string, patternString, newValueOrFn, globalOffset) {
	var index = string.indexOf(patternString)
	if (index >= 0) {
		var arr = []
		var endIndex = index + patternString.length
		if (index > 0) {
			arr.push(string.substring(0, index))
		arr.push(
			(typeof newValueOrFn === 'function') ?
				newValueOrFn(
					string.substring(index, endIndex),
					index + globalOffset,
					string
				newValueOrFn
		if (endIndex < string.length) {
			arr.push(string.substring(endIndex))
		return arr
		return [string]
function replaceUsingRegexp (string, regexp, newValueOrFn, globalOffset) {
	var output = []
	var replacerIsFn = (typeof newValueOrFn === 'function')
	var storedLastIndex = regexp.lastIndex
	regexp.lastIndex = 0
	var result
	var lastIndex = 0
	while (result = regexp.exec(string)) {
		var index = result.index
		if (result[0] === '') {
			// When the regexp is an empty string
			// we still want to advance our cursor to the next item.
			// This is the behavior of String.replace.
			regexp.lastIndex++
		if (index !== lastIndex) {
			output.push(string.substring(lastIndex, index))
		var match = result[0]
		lastIndex = index + match.length
		var out = replacerIsFn ?
			newValueOrFn.apply(this, result.concat(index + globalOffset, result.input)) :
			newValueOrFn
		output.push(out)
		if (!regexp.global) {
	if (lastIndex < string.length) {
		output.push(string.substring(lastIndex))
	regexp.lastIndex = storedLastIndex
	return output
module.exports = function stringReplaceToArray (stringOrArray, regexpOrSubstr, newSubStrOrFn) {
	if (typeof stringOrArray === 'string') {
		return replace(stringOrArray, regexpOrSubstr, newSubStrOrFn, 0)
	} else if (!Array.isArray(stringOrArray) || !stringOrArray[0]) {
		throw new TypeError('First argument must be an array or non-empty string')
		var len = stringOrArray.length
		var output = []
		var globalOffset = 0
		for (var i = 0; i < len; ++i) {
			var arrayItem = stringOrArray[i]
			if (typeof arrayItem === 'string') {
				output.push.apply(output, replace(arrayItem, regexpOrSubstr, newSubStrOrFn, globalOffset))
				globalOffset += arrayItem.length
			} else {
				output.push(arrayItem)
		return output

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