javascript insert element array code example

Example 1: javascript insert item into array

var colors=["red","blue"];
var index=1;

//insert "white" at index 1
colors.splice(index, 0, "white");   //colors =  ["red", "white", "blue"]

Example 2: javascript array push

// JS array .push() method

let items_in_backpack = ['food', 'water', 'flashlight', 'GPS']; // Our starting array
items_in_backpack.push('javascript array push knowledge'); // Adds the <<< string to the array items_in_backpack


// Now the array is:
// ['food', 'water', 'flashlight', 'GPS', 'javascript array push knowledge']