Javascript HTML CSS

The output of the below code is:

<p id="demo"></p>

<script>

var text = "";

var i;

for (i = 0; i < 5; i++) {

text += "The number is " + i + "<br>";

}

document.getElementById("demo").innerHTML = text;

</script>

• The number is 0

  The number is 1

  The number is 2

  The number is 3

  The number is 4

  The number is 5

• The number is 0

  The number is 1

  The number is 2

  The number is 3

  The number is 4

• The number is 1

  The number is 2

  The number is 3

  The number is 4

  The number is 5

• Why is that person using "var"???

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

• The === operator compares two values, without taking into account their types. == compares the values, but also makes their types into account.

• Do I really need to reply this?

• The == operator compares two values, without taking into account their types. === compares the values, but also makes their types into account.

• The == operator is used to assign a value to a variable. === is used to compare the values of two variables.

What is the DOM?

• Is an open standard file format, and data interchange format, that uses human-readable text to store and transmit data objects consisting of attribute–value pairs and array data types

• Is the standard markup language for documents designed to be displayed in a web browser. It can be assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript

• Is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable

• The Document Object Model is a cross-platform and language-independent interface that treats an XML or HTML document as a tree structure wherein each node is an object representing a part of the document

What are the Javascript data types?

• There are seven data types: Boolean, Null, Undefined, Number, String, Symbol, Object.

• There are eighth data types: Boolean, Null, Undefined, Number, String, Symbol, Object, Date.

• There are nine data types: Boolean, Null, Undefined, Number, String, Symbol, Object, Date, JSON.

• Sorry, what do you mean by data type?

What are the pop-up boxes types available in JavaScript?

• Alert, Redirect and Prompt

• Alert, Confirm and Prompt

• Nice try, a pop-up can be done only using jquery or a similar library

• Alert, Confirm, Redirect and Prompt

Which image best describes the meaning of null and undefined?

• 
• 
• 
• 

What are HTML Tags?

• HTML tags are composed of three things: an opening tag, content and ending tag. Some tags are unclosed tags.

• HTML tags are composed of three things: an opening tag, content and ending tag. All tags need to be closed.

• HTML tags define metadata about an HTML document. Metadata is data (information) about data.

• I didn't know that I was supposed to be studying

What is the use of the required attribute in HTML5?

Name: <input type="text" name="name" required>

• This adds a red border over the input box for the user to visually recognize that it is required.

• It forces a user to fill text on the text field or text area before submitting the form. It is used for form validation. But, the "required" attribute is not properly written in this example.

• It would be nice to have that functionality, but due to browser compatibility it does not work and manual validation is required.

• It forces a user to fill text on the text field or text area before submitting the form. It is used for form validation.

What are the new <input> types for form validation in HTML5?

• The new input types for form validation are text, textarea, radio, email, URL, number, tel, and date.

• The new input types for form validation are text, area, radio, email, URL, number, tel, and date.

• The new input types for form validation are email, URL, number, tel, and date.

• All these options are available since previous versions of HTML.

How to write HTML code dynamically using JavaScript?

• document.getElementById('some-div-id').innerHTML="<h2>This is heading using JavaScript</h2>";

• document.getElementById('some-div-id').innerHTML.val("<h2>This is heading using JavaScript</h2>";)

• document.getElementById('some-div-id').innerHTML.html("<h2>This is heading using JavaScript</h2>";)

• document.getElementByTagName('some-div-id').innerHTML="<h2>This is heading using JavaScript</h2>";