Canvas zoom to cursor doesn’t work correct

I’m trying to scale canvas to/from mouse position, but it works not perfect (always goes few cells away from mouse pos). I’ve read all similar posts but i don’t know what’s wrong. https://jsfiddle.net/…

Canvas linear gradient taking the value of another input type color field

So I have this simple image editor where I’m using a canvas to draw in a user-selected image and some texts. That is the user can upload an image and then if they want they can add texts or just …

How to make two canvas with two separate javascript code?

I am using Three.js to develop a cube that translates and rotate in 3D space using data from accelerometer and gyroscope data. So far I have one canvas that shows the accelerometer movement. Now I …

recording canvas animation playback issue with chromium browsers

If i use the following code to record a canvas animation: streamInput = parent.document.getElementById(‘whiteboard’); stream = streamInput.captureStream(); const recorder = …

How to represent any numbers in chart via canvas?

I want to create line chart via canvas, for data representation on vanilla JavaScript. For example canvas width 600px, height 400px. I have min and max possible numbers on Y axis and numbers between …

How to make canvas shape circle?

Hello I want to know how can I make the canvas shape circle in the below code. The code is about moving a object with keyboard keys. I tried to make the circle out of this box but it just disappeared …

How to keep drawing on canvas when scrolling?

I’m wanting to implement canvas as background for my website so users can use their cursors to paint on the webpage like this codepen: https://codepen.io/cocotx/pen/PoGRdxQ?editors=1010 (this is an …

Canvas and JavaScript – Flowing word from right to left while waiting for keypress input

I’m new and I am trying to write my first program. In this snippet I try to flow a word from right to left and on the left move a bar to the right and when they collide a life will be taken. I also …

Does canvas context2d.drawImage( webglCanvas, 0, 0 ) block until a webgl is finished rendering?

I assume the answer is “no” from my testing but I thought I’d make sure. I’m trying to draw / copy the contents from a WebGL canvas to a 2d canvas every frame and I want to know if I should …

Web Audio API is not working properly, in google chrome browser

I’ve created a simple music player, which creates a bufferArray for a particular audio URL to play the music. It is working fine in many of my cellphone’s browser, so I guess there is no cross origin …