jquery if string contains code example

Example 1: if str contains jquery

if (str.indexOf("Yes") >= 0)
  
  //case insensitive version
  if (str.toLowerCase().indexOf("yes") >= 0)

Example 2: check for substring javascript

const string = "javascript";
const substring = "script";

console.log(string.includes(substring));  //true

Example 3: jquery contains text

$( "div:contains( 'hello' )" )

Example 4: javascript string contains

var string = "foo",
var substring = "oo";

console.log(string.includes(substring));