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es.string.replace-all.js
67 lines (64 loc) · 2.61 KB
/
es.string.replace-all.js
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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 getSubstitution = require('../internals/get-substitution');
var wellKnownSymbol = require('../internals/well-known-symbol');
var IS_PURE = require('../internals/is-pure');
var REPLACE = wellKnownSymbol('replace');
var RegExpPrototype = RegExp.prototype;
var max = Math.max;
var stringIndexOf = function (string, searchValue, fromIndex) {
if (fromIndex > string.length) return -1;
if (searchValue === '') return fromIndex;
return string.indexOf(searchValue, fromIndex);
};
// `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, 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 = 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);
functionalReplace = typeof replaceValue === 'function';
if (!functionalReplace) replaceValue = String(replaceValue);
searchLength = searchString.length;
advanceBy = max(1, searchLength);
position = stringIndexOf(string, searchString, 0);
while (position !== -1) {
if (functionalReplace) {
replacement = String(replaceValue(searchString, position, string));
} else {
replacement = getSubstitution(searchString, string, position, [], undefined, replaceValue);
}
result += string.slice(endOfLastMatch, position) + replacement;
endOfLastMatch = position + searchLength;
position = stringIndexOf(string, searchString, position + advanceBy);
}
if (endOfLastMatch < string.length) {
result += string.slice(endOfLastMatch);
}
return result;
}
});