delete all elements from array javascript code example

Example 1: remove first element from array javascript

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.shift();

Example 2: Javascript remove empty elements from array

var colors=["red","blue",,null,undefined,,"green"];

//remove null and undefined elements from colors
var realColors = colors.filter(function (e) {return e != null;});
console.log(realColors);

Example 3: js delete all array items

A.splice(0,A.length)