Which of the following are not valid HTML events?

Best reason for not using 'for...in' with array iteration?

Which is not a valid JavaScript operator?

Which is an invalid function declaration?

Which is used to solve the problem of enumerations in JavaScript?

Which will determine if the user's browser is named 'Netscape'?

What's the output? var test = function test(){ console.log(window.location === document.location); }; test();

Which are invalid usage(s) for a web worker in JavaScript? 1. Making use of the window shortcut to get the current global scope in a web worker. 2. Trying to access data in DOM directly with a web worker.

What's the output? var test = function test(){ console.log('2' - - '2'); }; test();

What's the output? var str = /u/.exec('I am the best friend!'); console.log(str);

var a = [2, 5, 12, 16, 23, 35]; XXXX function abc( YYYY ) { return val > 20; } Which option will replace XXXX and YYYY in order to generate 4 as an output?