How do you check if a value is inside an array in JavaScript?

#javascript #javascriptarrays
Javascript arrays check if a value exists inside or not
How do you check if a value is not in an array JavaScript?
How do you check if a value exists in JS array?
How to Check If a Value Exists in an Array in JavaScript?
Determine whether an array contains a value
Checking if an array includes a value

[edmondesquilon]

What extension is that, where you can see if the condition is true or not

[freelanceriftekher]

What software and what extension use for codes.. brother....???

[sim]

What do you use for having those 'comments' on the left side?