Js null ==

Javascript is null

var myVar=null;

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

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

Js null ==

null == null // true
null == undefined // true
null == 0 // false

Null check in javascript

if(!pass || !cpass || !email || !cemail || !user) {
   // Code here
}
// Which will check for empty strings (""), null, undefined, false and the numbers 0 and NaN

Source: stackoverflow.com

Similar codes

0 vote150 views2 answers
Module '"@angular/fire"' has no exported member 'AngularFirestore'
TypeScript
24 votes127 views4 answers
React children typescript
TypeScript
0 vote129 views1 answer
How to separate real and imaginary parts of a complex number in python
TypeScript
16 votes130 views5 answers
For loop typescript
TypeScript
1 vote128 views1 answer
Python convert two lists with duplicates to dictiona
TypeScript
0 vote138 views1 answer
Typescript time
TypeScript
0 vote160 views1 answer
Avoid intertwining subplots in python
TypeScript
0 vote148 views1 answer
Void main() { testWidgets('Counter increments smoke test', (WidgetTester tester) async { // Build our app and trigger a frame. await tester.pumpWidget(MyApp());
TypeScript
0 vote172 views1 answer
Read_contacts android
TypeScript
0 vote149 views1 answer
Ips in range typescript
TypeScript