CodePen

HTML

            
              
            
          
!

CSS

            
              
            
          
!
? ?
? ?
Must be a valid URL.
+ add another resource
via CSS Lint

JS

            
              function f() {
    this.x = 1;
}

> x = new f()
{ x: 1 }
            
          
!
Must be a valid URL.
+ add another resource
via JS Hint
Loading ..................