Studying all day long)
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'use strict';
var $ = require('../internals/export');
var call = require('../internals/function-call');
var uncurryThis = require('../internals/function-uncurry-this');
var requireObjectCoercible = require('../internals/require-object-coercible');
var isCallable = require('../internals/is-callable');
var isRegExp = require('../internals/is-regexp');
var toString = require('../internals/to-string');
var getMethod = require('../internals/get-method');
var getRegExpFlags = require('../internals/regexp-get-flags');
var getSubstitution = require('../internals/get-substitution');
var wellKnownSymbol = require('../internals/well-known-symbol');
var IS_PURE = require('../internals/is-pure');
var REPLACE = wellKnownSymbol('replace');
var $TypeError = TypeError;
var indexOf = uncurryThis(''.indexOf);
var replace = uncurryThis(''.replace);
var stringSlice = uncurryThis(''.slice);
var max = Math.max;
var stringIndexOf = function (string, searchValue, fromIndex) {
if (fromIndex > string.length) return -1;
if (searchValue === '') return fromIndex;
return indexOf(string, searchValue, fromIndex);
};
// `String.prototype.replaceAll` method
// https://tc39.es/ecma262/#sec-string.prototype.replaceall
$({ target: 'String', proto: true }, {
replaceAll: function replaceAll(searchValue, replaceValue) {
var O = requireObjectCoercible(this);
var IS_REG_EXP, flags, replacer, string, searchString, functionalReplace, searchLength, advanceBy, replacement;
var position = 0;
var endOfLastMatch = 0;
var result = '';
if (searchValue != null) {
IS_REG_EXP = isRegExp(searchValue);
if (IS_REG_EXP) {
flags = toString(requireObjectCoercible(getRegExpFlags(searchValue)));
if (!~indexOf(flags, 'g')) throw $TypeError('`.replaceAll` does not allow non-global regexes');
}
replacer = getMethod(searchValue, REPLACE);
if (replacer) {
return call(replacer, searchValue, O, replaceValue);
} else if (IS_PURE && IS_REG_EXP) {
return replace(toString(O), searchValue, replaceValue);
}
}
string = toString(O);
searchString = toString(searchValue);
functionalReplace = isCallable(replaceValue);
if (!functionalReplace) replaceValue = toString(replaceValue);
searchLength = searchString.length;
advanceBy = max(1, searchLength);
position = stringIndexOf(string, searchString, 0);
while (position !== -1) {
replacement = functionalReplace
? toString(replaceValue(searchString, position, string))
: getSubstitution(searchString, string, position, [], undefined, replaceValue);
result += stringSlice(string, endOfLastMatch, position) + replacement;
endOfLastMatch = position + searchLength;
position = stringIndexOf(string, searchString, position + advanceBy);
}
if (endOfLastMatch < string.length) {
result += stringSlice(string, endOfLastMatch);
}
return result;
}
});