How do I check if an array includes a value in JavaScript?

You can use this in the modern browsers, code to check the array
 

console.log(['joe', 'jane', 'mary'].includes('jane')); //true

Also, you can the indexOf method like this:
 

console.log(['joe', 'jane', 'mary'].indexOf('jane') >= 0); //true

let arr = ['orange', 'blue', 'red'];let index = arr.indexOf('blue');if(index > -1){//Exists console.log(arr[index]);}

also, you can use this way using indexOf