print type of value

ini untuk proving type value negative

by oktaviardi pratama

HTML

<h1>
print type of value
</h1>

JavaScript

let test = undefined
let test2 = null
let test3 = true
let test4 = []
let test5 = {}
let test6 = false
let test7 = 0

function print(val) {
	if(!val) {
  console.log('negative validation included for: '+val)
  } 
}

print(test);
print(test2);
print(test3);
print(test4);
print(test5);
print(test6);
print(test7);

console.log(typeof ""); // 👉️ "string"
console.log(typeof "hello"); // 👉️ "string"
console.log(typeof "42"); // 👉️ "string"
console.log(typeof function () {}); // 👉️ "function"
console.log(typeof null); // 👉️ "object"
console.log(typeof []); // 👉️ "object"
console.log(typeof {}); // 👉️ "object"
console.log(typeof 0); // 👉️ "number"