Javascript remove empty elements from array

let array = [0, 1, null, 2, 3];

function removeNull(array) {
return array.filter(x => x !== null)
};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);var array = [0, 1, null, 2, "", 3, undefined, 3,,,,,, 4,, 4,, 5,, 6,,,,];

var filtered = array.filter(function (el) {
  return el != null;
});

console.log(filtered);const filterArray=(a,b)=>{return a.filter((e)=>{return e!=b})}
let array = ["a","b","","d","","f"];

console.log(filterArray(array,""));//>> ["a","b","d","f"]