JavaScript Tutorial || Introduction

author
January 27, 2024
Introduction to JavaScript 



  • JavaScript is the programming language of HTML and the Web.
  • JavaScript is a lightweight, interpreted programming language
  • The programs in this language are called scripts. They can be written right in a web page’s HTML and run automatically as the page loads.
  • JavaScript to program the behavior of web pages
  • There are many useful Javascript frameworks and libraries available:Angular,React,jQuery,Node.js etc
  • It offers full integration with HTML/CSS.
  • Simple things are done quickly without any complication or following strict rules.
  • Supported by all major browsers and JavaScript is enabled by default.
<!DOCTYPE html>
<html>


<head> <script> function myFunction() {   document.getElementById("hello").innerHTML = "welcome js."; }</script> </head> <body>




<p id="hello">hello javascript</p> <button type="button" onclick="myFunction()">submit</button>




</body> </html>

Result

" javascript "Paragraph change to  "welcome js.

  • JavaScript can be implemented using JavaScript statements that are placed within the <script>JavaScript code </script> HTML tags in a web page.
  • A function can be called when an event occurs, here when the user clicks a button onclick event in myFunction() function calling  


advantages

  • Show dynamic content based on the user profile.
  • React to user's operations, like mouse clicks events, key presses or pointer movements.
  • Support features like auto-validated form entries and interactive drop-down menus.
  • Send requests to remote servers, Upload and download files.
  • JavaScript code can also create movement and sound
  • Ask questions to the users, Get and set cookies, show messages, switch browser tabs.
  • Allows the data on to be stored in the local storage.