What is the difference between == and === ?

The == checks for value equality, but === checks for both type and value. In web development, especially in JavaScript, == and === are comparison operators used to compare values. Here’s the difference: == (Equality Operator): The == operator checks for equality of values after performing type coercion. Type coercion means converting the data type … Read more

Difference between window.onload and onDocumentReady?

The onload event does not fire until every last piece of the page is loaded, this includes css and images, which means there’s a huge delay before any code is executed. That isnt what we want. We just want to wait until the DOM is loaded and is able to be manipulated. onDocumentReady allows the … Read more

Can javascript code be broken in different lines?

Breaking is possible within a string statement by using a backslash \ at the end but notwithin any other javascript statement.that is, document.write(“Hello \world”); is possible but not document.write\(“hello world”); Yes, JavaScript code can be broken into different lines for the purpose of readability and organization. This practice is called line breaking or line wrapping. … Read more

How to create a function using function constructor?

The following example illustrates thisIt creates a function called square with argument x and returns x multiplied by itself. var square = new Function (“x”,”return x*x”); In JavaScript, you can create a function using the function constructor. The syntax for creating a function using the function constructor is as follows: javascriptCopy code var functionName = … Read more

What does break and continue statements do?

Continue statement continues the current loop (if label not specified) in a new iteration whereas break statement exits the current loop. In the context of web development interview questions, the correct answer to what break and continue statements do depends on the programming language being discussed, as they are common features in many programming languages. … Read more