test value in array javascript code example
Example 1: check if array does not contain value javascript
var fruits = ["Banana", "Orange", "Apple", "Mango"];
var n = fruits.includes("Mango");
var n = fruits.includes("Django");
Example 2: javascript test if it is an array
if (Array.isArray(object)) {
} else {
}
Array.isArray([1, 2, 3, 4]);
Array.isArray(4);
Example 3: how to Check if an array contains a string
const colors = ['red', 'green', 'blue'];
const result = colors.includes('red');
console.log(result);
const colors = ['Red', 'GREEN', 'Blue'];
const result = colors.map(e => e.toLocaleLowerCase())
.includes('green');
console.log(result);