Question

In most languages like C# for example given a string you can test (boolean) if that string contains another string, basically a subset of that string.

string x = test2;


if(x.contains("test"))
    // do something

How can I do this in a simple way with Javascript/Jquery?

Answer 1

This is done with indexOf, however it returns -1 instead of False if not found.

Syntax
string.indexOf(searchValue[, fromIndex])

Parameters
searchValue –
A string representing the value to search for.
fromIndex –
The location within string to start the search from. It can be any integer between 0 and the length of string. The default value is 0.

Return
The first index in string at which the start of the substring can be found, or -1 if string does not contain any instances of the substring.