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How to set the cursor to wait in JavaScript?

What is the output of 10+20+"30" in JavaScript?

How to write HTML code dynamically using JavaScript?

If we want to return the character from a specific index which method is used?

Write a function that performs binary search on a sorted array.

Guess the output of the following code.
var x = 23;

(function(){
var x = 43;
(function random(){
x++;
console.log(x);
var x = 21;
})();
})();

Explain Closures in JavaScript.

Difference between "==" and "===" operators?

What will the following code output
var hero = {
_name: 'John Doe',
getSecretIdentity: function (){
return this._name;
}
};

var stoleSecretIdentity = hero.getSecretIdentity;

console.log(stoleSecretIdentity());
console.log(hero.getSecretIdentity());

What will the code below output to the console
var arr1 = "john".split('');
var arr2 = arr1.reverse();
var arr3 = "jones".split('');
arr2.push(arr3);
console.log("array 1: length=" + arr1.length + " last=" + arr1.slice(-1));
console.log("array 2: length=" + arr2.length + " last=" + arr2.slice(-1));

What is the output of the following code?
var length = 10;
function fn() {
console.log(this.length);
}

var obj = {
length: 5,
method: function(fn) {
fn();
arguments[0]();
}
};

obj.method(fn, 1);

What is the output of below code.

function checkType(num = 1) {
console.log(typeof num);
}

checkType();
checkType(undefined);
checkType('');
checkType(null);

write a code for lucky sevens using javascript

Give an example of JavaScript Multiplication Table

What is the output of below code
function delay() {
return new Promise(resolve => setTimeout(resolve, 2000));
}

async function delayedLog(item) {
await delay();
console.log(item);
}

async function process(array) {
array.forEach(async (item) => {
await delayedLog(item);
});
console.log('Process completed!');
}
process([1, 2, 3, 5]);

Give an example of JavaScript Multiplication Table

What is the output of below code
const USER = {'age': 30};
USER.age = 25;
console.log(USER.age);

What is the output of below code?
getMessage();

var getMessage = () => {
console.log("Good morning");
};

What are asynchronous thunks

Does JavaScript supports namespace