update array index javascript code example

Example 1: replace array element javascript

// Replace 1 array element at index with item 
arr.splice(index,1,item);

Example 2: update an item in array of object

//Initailize array of objects.
let myArray = [
  {id: 0, name: "Jhon"},
  {id: 1, name: "Sara"},
  {id: 2, name: "Domnic"},
  {id: 3, name: "Bravo"}
],
    
//Find index of specific object using findIndex method.    
objIndex = myArray.findIndex((obj => obj.id == 1));

//Log object to Console.
console.log("Before update: ", myArray[objIndex])

//Update object's name property.
myArray[objIndex].name = "Laila"

//Log object to console again.
console.log("After update: ", myArray[objIndex])

Example 3: javascript replace array element

array.splice(array.indexOf(valueToReplace), 1, newValue);