Which statement is true about HTML canvas clearRect() method?

Which one from the below is correct for e-mail hyperlink for the blank-

<a href="_____: abc@mail.com">Mail us</a>

What would be the output?

const arr = [ null, undefined, "CodingOmega", false, 7 ]; const joined = arr.join("-"); console.log(joined);

1 nibble = ?

How to prevent zoom in your site using CSS?

let varName = (function(num){
delete (num);
return (num); })(0); console.log(varName);

console.log(Boolean("0"));