I want to remove all element from array except the element of array at 0th index
[a, b, c, d, e, f]
Output should be a
You can set the length property of the array.
var input = ['a','b','c','d','e','f'];
input.length = 1;
console.log(input);OR, Use splice(startIndex) method
var input = ['a','b','c','d','e','f'];
input.splice(1);
console.log(input);OR use Array.slice method
var input = ['a','b','c','d','e','f'];
var output = input.slice(0, 1) // 0-startIndex, 1 - endIndex
console.log(output); 
