In HTML, JavaScript makes the web more flexible and interactive. JavaScript plays a rather important role for websites. If you want to verify this, you can try turning off JavaScript in your browser and browsing the web to see if anything is wrong.

• What is JavaScript? Can the Internet exist without JavaScript?
• Enable and disable JavaScript on Chrome browser
• Arrays and objects in JavaScript are like stories and newspapers!

You can copy the code below and run it in the browser to see a little bit about how JavaScript will help web pages.

My First JavaScript

 onclick = "document.getElementById ('vidu'). innerHTML = Date ()"> 
 Click to display the date. 

 

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Some examples of JavaScript

Change HTML content

 document.getElementById("demo").innerHTML = "Xin chào JavaScript!"; 

Change style in HTML

 document.getElementById("demo").style.fontSize = "25px"; 
 document.getElementById("demo").style.color = "red"; 
 document.getElementById("demo").style.backgroundColor = "yellow"; 

Change HTML properties

 document.getElementById("image").src = "picture.gif"; 

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