JavaScript String Search

String Search Methods

String indexOf()

String lastIndexOf()

String search()

String match()

String matchAll()

String includes()

String startsWith()

String endsWith()

See Also:

String Tutorial

String Methods

String Templates

String Reference

JavaScript String indexOf()

The indexOf()

of the first occurrence of a string in a string, or it returns - 1 if the string is not found:

Example

let text = "Please locate where 'locate' occurs!";
let index = text.indexOf("locate");

JavaScript String lastIndexOf()

The lastIndexOf()

Example

let text = "Please locate where 'locate' occurs!";
let index = text.lastIndexOf("locate");
Both indexOf(), and lastIndexOf()
return -1 if the text is not found:

Example

let text = "Please locate where 'locate' occurs!";
let index = text.lastIndexOf("John");

Example

let text = "Please locate where 'locate' occurs!";
let index = text.indexOf("locate", 15);

The lastIndexOf()

Example

let text = "Please locate where 'locate' occurs!";
text.lastIndexOf("locate", 15);