`String.prototype.search()`

Returns the index of the first match of a regular expression, or -1.

Syntax

str.search(regexp)

Name	Type	Required	Description
`regexp`	`RegExp`	Yes	A regular expression. A non-RegExp value is converted via `new RegExp()`.

number — The index of the first match, or -1 if no match is found.

console.log('hello world'.search(/world/));

Output

console.log('abc'.search(/\d/));

Output

-1

Ignores the global (g) flag and always returns the index of the first match. Use `match`/`matchAll` if you need the matched text or groups.