check contains in string in typescript code example

Example 1: javascript contains substring

var str = "We got a poop cleanup on isle 4.";
if(str.indexOf("poop") !== -1){
	alert("Not again");
}
//use indexOf (it returns position of substring or -1 if not found)

Example 2: typescript string contains

const test = 'Hello World';
if (test.includes('World')) { 
  // Found world
}