javascript array check if all values are equal code example

Example 1: check if array has same values javascript

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

Example 2: check array values equal js

[1,1,1,1].every( (val, i, arr) => val === arr[0] )   // true

Example 3: how to get every index of array in javascript

for(const element of array)
  console.log(element)