When I use the amazon AWS ec2 virtual machine, I always find the virtual machine runs too slow. I open the task manager and found that the CPU usage always reaches 100%, this is the root cause of the slow VM. But at last, I find the real reason is because of the AWS EC2 […]
How To Choose High Performance AWS EC2 Instance Type For You To Run Faster Read More »
Recently when I use Html5 canvas to capture video screenshots and save the screenshots to an image, it through the error Uncaught DOMException: Failed to execute ‘toDataURL’ on ‘HTMLCanvasElement’: Tainted canvases may not be exported. This article will tell you how to fix it.
When your JavaScript application needs a lot of images, you may find it will cost so much time to download all those images. Downloading each image will create an HTTP request to your web server, and this will reduce your server performance very much for large HTTP requests. This example will tell you how to
How To Implement Sprite Sheet Animation Using Javascript & Pure CSS Read More »
Through CSS3, we can create animation, which can replace animated pictures, flash animation, and JavaScript on many web pages. What you need to do is to define the animation rule using the @keyframes keyword with a given name, and then assign the animation to an Html element’s animationName CSS style attribute. This article will tell
How To Use Keyframe Animation In CSS Read More »
If you want to disable/enable a button after clicking the button in JavaScript, you can use the button element’s disabled attribute. When you set the button’s disabled attribute’s value to true, then the button will be disabled. When you set the button’s disabled attribute’s value to false, then the button will be enabled. This article will
How To Disable Enable Button After One Click In Javascript Read More »
There are 3 JavaScript functions that are used to process string variable, they are substring(startIdx, endIdx), substr(startIdx, numberOfCharactors), slice(startIdx, endIdx). If you are a JavaScript beginner, you may confuse about the usage of the 3 functions, this article will tell you the difference between them with examples.
Javascript Substring Vs Substr Vs Slice Read More »
When you develop a javascript program, you always need to get the client user’s web browser information such as name and version, .etc. This article will tell you how to get the web-browser data using javascript with examples.
How To Use JavaScript To Get Web Browser Name And Version Read More »
This example will show you how to set an Html element’s top & left offset position using javascript, through this method you can move a canvas object on an Html web page by specifying it’s top & left offset position.
How To Set Html Element ( For Example Canvas ) Position Using Javascript Read More »
When you develop a javascript application, especially process images, you always need to get the image dimension size in pixels. This article will tell you how to easily get an image pixel size in windows.
How To Get Image Pixel Size In Windows Read More »
Recently when I use VSCode to clone a git repository to my local computer, I meet the error message Authentication failed on the git remote. This article will tell you how to fix it.
How To Fix Error Authentication Failed On The Git Remote Read More »
