Choose the client-side JavaScript object:

When interpreter encounters an empty statements, what it will do:

Which of the following API is a MUST for every ReactJS component?

Which one of the following is the correct output for the given JavaScript code?

const object1 ={};
a = Symbol('a');
b =Symbol.for('b');
object1[a]='harry';
object1[b]='derry';
constobjectSymbols=Object.getOwnPropertySymbols(object1);
console.log(constobjectSymbols.length);

Before updating the user interface, React uses which algorithm to compare the new tree with the most recent tree to find out the most efficient way to update the user interface

Babel is

Every object contains three object attributes that are _______.

What will be the function of the following JavaScript code?

var scope = "global scope";
function checkscope()
{
var scope = "local scope";
function f()
{
return scope;
}
return f;
}

What is the declarative way to render a dynamic list of components based on values in an array

Which one of the following is correct output for the following given JavaScript code:

var obj=
{
length:20,
height:35,
}
if('breadth' in obj === false)
{
obj.breadth = 12;
}
console.log(obj.breadth);

Scripting language are

Which one of the following operator is used to check weather a specific property exists or not:

What does the following JavaScript code snippet do?
data.sort(function(a,b),b-a);

In JavaScript, Window.prompt() method return true or false value ?

What is used in ReactJs to increase performance del