I wrote an Html file that contains some javascript code. It is an Html5 file, so I add a canvas in the Html source code and get the canvas context object with the code move_canvas.getContext(‘2d’);. But when I browse the Html5 file in a web browser, it shows the error message Uncaught TypeError: move_canvas.getContext is […]
How To Fix Canvas.getContext Is Not A Function Javascript Error Read More »
I Include an external javascript file in an Html file, when I browse the Html file in a web browser, I meet the javascript error with the error message Uncaught SyntaxError: Invalid or unexpected token. This article will tell you how to fix it.
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This article will show you an example of how to use the Html5 canvas object + javascript to implement the 404 file not found error page with snowflakes on the screen. The sentence on the page is 404 File Not Found which has green color. The text will change it’s transparency value periodically to make
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I include an external javascript file in my Html file, this javascript file is written by me also. The Html file name is test.html, the javascript file name is test.js. I upload the two files to a local web browser ( if not upload the file test.html, test.js to a web server, you will encounter
I write an Html file, and include an external javascript file in the Html file with the code <script type=”module” src=”test.js” ></script>. But when I open the Html file from a web browser with a local file URL like file:///D:/Work/……/test.html that starts with the file:// protocol scheme, it shows the error message Access to script
This article will show you examples of how to validate the Html form automatically or use javascript explicitly.
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The Html5 output tag can be used to show the text on the web page. You can set the text from the javascript code. In general, it will output the other Html tag’s value on the web page. This article will show you examples of how to use it.
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This article will tell you how to use the Html5 global attribute contentEditable to make the Html element editable or uneditable. It will also tell you how to use the Html element’s attribute isContentEditable to check whether the Html element is editable with examples.
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CSS supports a variety of different length units, which can be divided into two groups according to different types: absolute length units (such as inches, centimeters, and points) and relative length units (such as percentage). This article will show you some examples of how to use CSS absolute and relative length units.
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