How are elements treated in the HTML DOM?

What is the purpose of the + operator?

Which property of the Window object represents the content displayed in the window?

What is the output of the following code?

<script>

var x = "abc dbc daabcab cd aabc";

var y = x.indexOf("aabc");

document.write(y);

</script>

What will be the output of the following JavaScript code?

<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = Number(true);
</script>

What is the output of the following code?

function fun(a,b){

var c;

c=a+b;

return c;

}

var result;

result=fun(0,24);

window.alert("result "+result)

What will be the output of the following JavaScript code?

let a = 4;
let b = 1;
let c = 0;

if (a == b) {
console.log(a);
} else if (a == c) {
console.log(a);
} else {
console.log(c);
}

When should you pass a function instead of an object to this.setState?

The purpose of the bitwise OR operator (|) is to: