javascript - Check if text is in a string

I want to check is some text is in a string for instance i have a string

str = "car, bycicle, bus"

and I have another string

str2 = "car"

I want to check if str2 is in str.

I am a newbie in javascript so please bear with me :)

Regards

Answer

if(str.indexOf(str2) >= 0) {
   ...
}

Or if you want to go the regex route:

if(new RegExp(str2).test(str)) {
  ...
}

However you may face issues with escaping (metacharacters) in the latter, so the first route is easier.