W3Schools JavaScript Introduction

Overview

• JavaScript is a versatile programming language mainly used in web development.
• It can modify HTML and CSS and handle data operations like calculations and validation.

Importance of JavaScript

• Essential along with HTML and CSS for web development.
  • HTML for content
  • CSS for layout
  • JavaScript for functionality

JavaScript Functionalities

Modify HTML Content

• Use getElementById() to change HTML elements.
• Example: document.getElementById("demo").innerHTML = "Hello JavaScript";

Modify HTML Attributes

• JavaScript can change attributes, such as the src of an <img> tag.

Modify HTML Styles (CSS)

• Adjust styles through JavaScript, e.g., fontSize: document.getElementById("demo").style.fontSize = "35px";

Control HTML Display

• Hide elements: document.getElementById("demo").style.display = "none";
• Show elements: document.getElementById("demo").style.display = "block";

JavaScript vs Java

• JavaScript and Java are distinct languages.
• JavaScript was developed by Brendan Eich in 1995.
• Became an ECMA standard in 1997, known officially as ECMAScript.

Additional Resources

• Explore all JavaScript versions and their features on W3Schools.

Learning and Certification Opportunities

• W3Schools offers free tutorials, references, exercises, and quizzes.
• Certification options available for skills documentation.

Engage Further

• Subscribe to W3Schools resources and improve learning experience.
• Join W3Schools on various social media platforms for updates.

For more detailed tutorials and interactive examples, please visit the official W3Schools JavaScript Introduction page.