Server-Sent Events allow a web page to get updates from a server. Server-Sent Events – One Way Messaging A server-sent event is when a web page automatically gets updates from a server. This was also possible before, but the web page would have to ask if any updates were available. With server-sent events, the updates […]
The HTML <canvas> element is used to draw graphics on a web page. The graphic to the left is created with <canvas>. It shows four elements: a red rectangle, a gradient rectangle, a multicolor rectangle, and a multicolor text. What is HTML Canvas? The HTML <canvas> element is used to draw graphics, on the fly, via JavaScript. The <canvas> element is only […]
What is New in HTML5? The DOCTYPE declaration for HTML5 is very simple: <!DOCTYPE html> The character encoding (charset) declaration is also very simple: <meta charset=”UTF-8″> HTML5 Example: <!DOCTYPE html> <html> <head> <meta charset=”UTF-8″> <title>Title of the document</title> </head><body> Content of the document…… </body></html> Try it Yourself » The default character encoding in HTML5 is UTF-8. New HTML5 Elements […]
Example Draw a red square, on the fly, and show it inside the <canvas> element: <canvas id=”myCanvas”></canvas> <script> var canvas = document.getElementById(“myCanvas”); var ctx = canvas.getContext(“2d”); ctx.fillStyle = “#FF0000”; ctx.fillRect(0, 0, 80, 80); </script> Try it Yourself » Definition and Usage The <canvas> tag is used to draw graphics, on the fly, via scripting (usually JavaScript). The <canvas> tag is only a container […]
