Cannot read property 'getContext' of null, using canvas?

I get the error Uncaught TypeError: Cannot read property 'getContext' of null and the important parts in files are.....

HTML5 Canvas + JavaScript wireframe sphere transformation issue?

I have written some JS code to plot a 3D wireframe sphere into a HTML5 canvas. I started from this post and improve...

Strange iframe added into body tags called `rufous-sandbox`?

I'm working on a local WordPress site, and for some reason there is an iframe added just after the opening body tag ...

CSS color vs. background-color vs. background??

In HTML when do I use color, and what is the difference between background-color and also the background tag? What ...

when I try to open an HTML file through `http://localhost/xampp/htdocs/index.html` it says unable to connect to localhost?

I have installed XAMPP , there is a htdocs folder and inside it index.html file , when I try to open it in my bro...

Creating a responsive cloud shape?

I've been trying to create a responsive cloud shape in CSS for a project. I am trying not to do this with images, CS...

HTML & CSS Simple Crossword?

I'm trying to design my own website, and I wanted to do a simple crossword puzzle to demonstrate some things about m...

How do I create a teardrop in HTML??

How do I create a shape like this to display on a webpage? I don't want to use images since they would get blurry...

HTML Failed parsing 'srcset' attribute value since it has an unknown descriptor on images - React - Webpack?

Might be worth mentioning that I am using React and Webpack. Example of this: <img src="https://increasify.com....

Using jQuery to 'click' a li element?

I have a <ul> element that dynamically generates the <li> elements and simply want to run a onclick even...

How do I put my website's logo to be the icon image in browser tabs??

The image next to the page title in the browser tab - how can you link an image here? ...

using onClick on images to display text?

I should start off by saying that if there is a question like this I'm very sorry but I couldn't quite find a defini...

M4V Mimetype - video/mp4 or video/m4v??

I am serving a video via the HTML5 video element. I'm finding conflicting information about the appropriate MIME typ...