javascript to check null code example

Example 1: javascript is not null

if(data !== null && data !== '') {
   // do something
}

Example 2: js check null

if (Var === null) { 
//code goes here
}

Example 3: javascript check for null variables

var myVar=null;

if(myVar === null){
    //I am null;
}

if (typeof myVar === 'undefined'){
    //myVar is undefined
}

Example 4: javascript null check

if (Var === null) { 
//code goes here
}