To calculate the area and perimeter of a circle, you can try to run the following code −Example           JavaScript Example                        function Calculate(r) {             this.r = r;   ... Read More

If you want to allow a user to upload an external file to your website, you need to use a file upload box, also known as a file select box. This is also created using the element but type attribute is set to file.ExampleLive DemoYou can try to run ... Read More

Extend the life of a cookie beyond the current browser session by setting an expiration date and saving the expiry date within the cookie. This can be done by setting the ‘expires’ attribute to a date and time.ExampleYou can try to run the following example to set the expiry date ... Read More

Adding semicolons after every function is optional. To avoid undesirable results, while using functions expressions, use a semicolon.Using semicolonvar display = function () {   alert(“Hello World”); }; (function () {   // code })();Without using semicolonvar display = function () {   alert(“Hello World”); } (function () {   // code })();The first function executes immediately since we have used the semicolon.

Use toDataURL() method to get the image data URL of the canvas. It converts the drawing (canvas) into a64 bit encoded PNG URL.ExampleYou can try to run the following code to save the canvas as an image −                     ... Read More

Use the onprogress attribute to execute a script when the browser is in the process of getting the media data in HTML.ExampleYou can try to run the following code to implement onprogress attribute −                                        Your browser does not support HTML5 video.                      function display() {             alert("Started");          }          

Use the step attribute to include the legal number intervals for an input field in HTML. The HTML input type step attribute sets the legal number intervals. Steps are number steps like 0, 5, 10, 15, 20, etc. The step attribute can be used together with the max and min attributes to create a ... Read More

Use the max attribute to add the maximum value in HTML. You can try to run the following code to implement max attribute − Example                    Rank:                              

When the mouse button is released over an element, the onmouseup event triggers. You can try to run the following code to implement onmouseup attribute −Example                    This is demo heading.             Click above and then ... Read More

Use the tag to add a noframe section. The HTML tag is used to handle the browsers which do not support tag. This tag is used to display an alternate text message.Example           HTML noframes Tag                                                 Your browser does not support frames.