es.string.replace-all.js
1.95 KB
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'use strict';
var $ = require('../internals/export');
var requireObjectCoercible = require('../internals/require-object-coercible');
var isRegExp = require('../internals/is-regexp');
var getRegExpFlags = require('../internals/regexp-flags');
var wellKnownSymbol = require('../internals/well-known-symbol');
var IS_PURE = require('../internals/is-pure');
var REPLACE = wellKnownSymbol('replace');
var RegExpPrototype = RegExp.prototype;
// `String.prototype.replaceAll` method
// https://github.com/tc39/proposal-string-replace-all
$({ target: 'String', proto: true }, {
replaceAll: function replaceAll(searchValue, replaceValue) {
var O = requireObjectCoercible(this);
var IS_REG_EXP, flags, replacer, string, searchString, template, result, position, index;
if (searchValue != null) {
IS_REG_EXP = isRegExp(searchValue);
if (IS_REG_EXP) {
flags = String(requireObjectCoercible('flags' in RegExpPrototype
? searchValue.flags
: getRegExpFlags.call(searchValue)
));
if (!~flags.indexOf('g')) throw TypeError('`.replaceAll` does not allow non-global regexes');
}
replacer = searchValue[REPLACE];
if (replacer !== undefined) {
return replacer.call(searchValue, O, replaceValue);
} else if (IS_PURE && IS_REG_EXP) {
return String(O).replace(searchValue, replaceValue);
}
}
string = String(O);
searchString = String(searchValue);
if (searchString === '') return replaceAll.call(string, /(?:)/g, replaceValue);
template = string.split(searchString);
if (typeof replaceValue !== 'function') {
return template.join(String(replaceValue));
}
result = template[0];
position = result.length;
for (index = 1; index < template.length; index++) {
result += String(replaceValue(searchString, position, string));
position += searchString.length + template[index].length;
result += template[index];
}
return result;
}
});