JavaScript : Introduction

In 1995 JavaScript was created. A new tool that web developers can use to allow them make web pages more interactive by accessing and modifying the content of markup (html) of the page

how it works in more detail?

1.It can access your html content your elements ,attributes and etc

-Select the text inside all of the <h1>elements on a page.

-Find out what was entered into a text input whose id attribute has a value of email.

2.It can modify your html elements by adding a paragraph after that h1 of yours ,modify a size of an image and even checks the validation of you login/sign up form ,and above all of that it can react to events like a A button is pressed ,Information is added to a form and etc

3.another thing you can do with JavaScript is making a Browser extension to modify whatever you want in a web page