Consider the following piece of code (test it yourself): function draw() { var canvas = document.getElementById('canvas'); var ctx = canvas.getContext('2d'); ctx.beginPath(); ctx.arc(75, 75, 50, 0, Math.PI * 2, true); // Outer circle ctx.stroke(); ctx.moveTo(75, 75); ctx.save(); ctx.setLineDash([3, 3]); ctx.lineTo(90, 90);…
I am curious on the curious behaviour of js, in particular with this method .strokeStyle which usually is used to change the color of a stroke on a HTML canvas. It seems to me quite peculiar, for exmaple if I…
I have created pulse animation using html canvas. There is two rectangles. Rectangle's positions is updated dynamically. The smaller rectangle has pulse animation. I have problem calculate it's center position value. Without scaling I get correct position. But when scaling…
I want to use MS paint style line tool to draw straight line using UI on html canvas element using JS. The issue is that line preview must be visible on canvas as mouse is being dragged after click at…
I have an HTML page with a canvas in the body defined as so: <!DOCTYPE html> <html> <head> <script defer src="./js/canvas.js"></script> <link rel="stylesheet" href="./css/canvas.css"> </head> <body> <canvas id="pinboard"></canvas> </body> </html> In canvas.js I've written: var canvas = document.getElementById("pinboard"); canvas.addEventListener("mousedown", function…
For context, I'm trying to make a project using the html canvas in React. I am trying to replace the class components with functional components for uniformity and avoiding mixing of class and functional components. The example below should simply…
In my application, a user can load custom content such as a third-party hosted image. I have specific goals (for security): Load the image in a sandboxed iframe and "transfer" the image to the "host". This allows the "host" to…
I am creating one progress bar using Html5 Canvas, Where i need to show the progress bar based on provided value. Now user set some value and based on it the progress bar should complete the progress. I have found…
I tried developing a graph drawing web app using a canvas which includes animations for lines as this: function animateLine(x1, y1, x2, y2) { ctx.lineWidth = 5; const nrFrames = 30; const dy = y2 - y1; const dx =…
On my current project, I'm using Excalidraw, and I'm drawing a top layer of <div>s on top of the <canvas>. It all works fine, but, when it comes to scrolling through the infinite canvas, if the mouse is on top…