Answers for "js if is null return empty string"

javascript null or empty

var myVar=null;

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

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

javascript check if string is empty

var string = "not empty";
if(string == ""){
  console.log("Please Add");
}
else{
  console.log("You can pass"); // console will log this msg because our string is not empty
}