Check if text is in a string

Question

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 1

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.

Answer 2

ES5

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

ES6

if (str.includes(str2)) {  } 

Answer 3

str.lastIndexOf(str2) >= 0; this should work. untested though.

let str = "car, bycicle, bus";
let str2 = "car";
console.log(str.lastIndexOf(str2) >= 0);