check if all the values are equal in an object javascript code example

Example 1: Javascript compare two objects

var person1={first_name:"bob"};
var person2 = {first_name:"bob"}; 

//compare the two object
if(JSON.stringify(person1) === JSON.stringify(person2)){
    //objects are the same
}

Example 2: check if array has same values javascript

const allEqual = arr => arr.every(v => v === arr[0]);
allEqual([1,1,1,1]);  // true