check if something is null js code example

Example 1: javascript check if undefined or null

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

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
}