es.string.search.js•1.64 kB
'use strict';
var call = require('../internals/function-call');
var fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');
var anObject = require('../internals/an-object');
var isNullOrUndefined = require('../internals/is-null-or-undefined');
var requireObjectCoercible = require('../internals/require-object-coercible');
var sameValue = require('../internals/same-value');
var toString = require('../internals/to-string');
var getMethod = require('../internals/get-method');
var regExpExec = require('../internals/regexp-exec-abstract');
// @@search logic
fixRegExpWellKnownSymbolLogic('search', function (SEARCH, nativeSearch, maybeCallNative) {
return [
// `String.prototype.search` method
// https://tc39.es/ecma262/#sec-string.prototype.search
function search(regexp) {
var O = requireObjectCoercible(this);
var searcher = isNullOrUndefined(regexp) ? undefined : getMethod(regexp, SEARCH);
return searcher ? call(searcher, regexp, O) : new RegExp(regexp)[SEARCH](toString(O));
},
// `RegExp.prototype[@@search]` method
// https://tc39.es/ecma262/#sec-regexp.prototype-@@search
function (string) {
var rx = anObject(this);
var S = toString(string);
var res = maybeCallNative(nativeSearch, rx, S);
if (res.done) return res.value;
var previousLastIndex = rx.lastIndex;
if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;
var result = regExpExec(rx, S);
if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;
return result === null ? -1 : result.index;
}
];
});