js check if null code example
Example 1: javascript not null
if (variable !== null) {
console.log("Var is NOT null");
}
Example 2: javascript check if not null
//Even if the value is 0, this will execute.
if (myVar !== null) {...}
//If you don't want it to execute when it's 0, then set it as
if (myVar) {...}
//This will return false if var value is 0.
Example 3: check if variable is undefined or null jquery
if (variable == null) {
// variable is either null or undefined
}
Example 4: javascript check if null
if (variable === null) { //Executes only if variable is null but not undefined
//Code here
}
if (variable == null) { //Executes if variable is null OR undefined
//Code here
}
Example 5: js check null
if (Var === null) {
//code goes here
}
Example 6: javascript check for null variables
var myVar=null;
if(myVar === null){
//I am null;
}
if (typeof myVar === 'undefined'){
//myVar is undefined
}