check to see if property has changed in component angular code example

Example 1: js check if object has property

const object1 = new Object();
object1.property1 = 42;

console.log(object1.hasOwnProperty('property1'));
// expected output: true

Example 2: jquery check if element has class starting with

/* Answer to: "jquery check if element has class starting with" */

if(!$(this).is('[class*="answerbox"]')) {
    //Finds element with no answerbox class
} else {
    //The element has already an answerbox class
}