how to empty the list in javascript code example

Example 1: javascript empty array

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

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

Example 2: javascript declare empty array

// Variable array for a wider scope:
var arrayName = [];
// Local scope variable array:
let arrayName = [];