empty array js

arr = [];   // set array=[]

//function
const empty = arr => arr.length = 0;
//example
var arr= [1,2,3,4,5];
empty(arr) // arr=[]

var colors = ["red","blue","green"];
    colors = []; //empty the array

var colors=[];
if(!colors.length){
	// I am empty
}else{
	// I am not empty
}

let arrayName = [];

// define Array
let list = [1, 2, 3, 4];
function empty() {
    //empty your array
    list = [];
}
empty();

let list = [1, 2, 3, 4];
function empty() {
    //empty your array
    list.length = 0;
}
empty();

A = [];

Array.isArray(emptyArray) && emptyArray.length

if (array === undefined || array.length == 0) {
    // array empty or does not exist
}

let myArray = [12 , 222 , 1000 ];  
myArray.length = 0; // myArray will be equal to [].