js typeof undefined code example

Example 1: javascript typeof undfined

var x;
if (typeof x === 'undefined') {
   // these statements execute
}

Example 2: jquery typeof undefined

if (typeof value === "undefined") {
    // ...
}

Example 3: javascript type of undefined

if (typeof x == 'undefined'){
   // instructions
 }

Example 4: javascript assignment operator if undefined

const variable2 = variable1  || 'new';