RegExp.prototypeSymbol.search — Description
This method exists for customizing the search behavior in RegExp subclasses.
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This method exists for customizing the search behavior in RegExp subclasses. It is called internally in {{jsxref("String.prototype.search()")}}. For example, the following two examples return the same result.
Symbol.search always calls the regex's exec() method exactly once, and returns the index property of the result, or -1 if the result is null. The g flag has no effect with this method.
This method does not copy the regular expression, unlike [Symbol.split](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/Symbol.split) or [Symbol.matchAll](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/Symbol.matchAll). However, unlike [Symbol.match](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/Symbol.match) or [Symbol.replace](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/Symbol.replace), it will always set lastIndex to 0 when execution starts and r
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MDN Web Docs — files/en-us/web/javascript/reference/global_objects/regexp/symbol.search/index.md :: Description ↗Revision d14bee540b53 · CC-BY-SA-2.5