What does setAttribute do in JavaScript?

setAttribute() Sets the value of an attribute on the specified element. If the attribute already exists, the value is updated; otherwise a new attribute is added with the specified name and value.

How do we change the attribute value of an HTML tag dynamically?

Approach:

1. Select the element whose style properties needs to be change.
2. Use element. style property to set the style attribute of an element.
3. Set the properties either by using bracket notation or dash notation.

How do I add attributes to querySelector?

How it works:

1. First, select the button with the id btnSend by using the querySelector() method.
2. Second, set the value of the name attribute to send using the setAttribute() method.
3. Third, set the value of the disabled attribute so that when users click the button, it will do nothing.

How do you append in HTML?

HTML DOM appendChild() Method

1. Append an item in a list: var node = document.
2. Move a list item from one list to another: var node = document.
3. Create a

   element and append it to a element: var para = document.

4. Create a

   element with some text and append it to the end of the document body:

Where to add JavaScript HTML?

You can add JavaScript code in an HTML document by employing the dedicated HTML tag

How do I run JavaScript in HTML?

JavaScript runs on a web browser but for that you need to include your java script code in a html file and open the file in a web browser. There are two ways you can include java script code in a html file: Use the script tag to write the java script code directly in the html file it self.

How do you add two numbers in JavaScript?

On adding two numbers, adding two numbers does not mean static value but dynamic inputs with a simple number validation. Below is the step by step procedure. Create a index.html and place the below code in the body section of the HTML file. Create a javascript file(script.js) with the below content.

How do I create an array in JavaScript?

Creating arrays in JavaScript is easy with the array literal notation. It consists of two square brackets that wrap optional array elements separated by a comma. Array elements can be any type, including number, string, Boolean, null, undefined, object, function, regular expression and other arrays.