How to realize the countdown effect of Canvas

This article mainly introduces how to achieve the countdown effect of Canvas, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

HTML:

JS:

Var canvas = document.getElementById ('canvas'); var context = canvas.getContext (' 2d'); / / Note that there is no unit, and it is not recommended to set width and height in css. It is best to call the two properties width and height: canvas.width = 1024 × canvas.height = 768

Practice: draw a straight line (to be very careful, the state must be set before you can adjust the stroke () method to draw, if the order is reversed, there will be no result, and if you do not report an error, debugger will not be able to adjust the problem. )

/ / first set the status context.moveTo (100,100); context.lineTo (700700); context.lineTo (700,100); context.lineTo (100,100); context.lineWidth = 10; context.strokeStyle = "pink"; / / then enter the drawing context.stroke ()

Define a path:

Context.moveTo (100,100); / / accepts two parameters that represent the x and y coordinates context.lineTo (700700)

Define multiple paths: wrap the defined state with the following method, and then call the stroke () method to draw lines in different states.

Context.beginPath (); context.closePath (); Thank you for reading this article carefully. I hope the article "how to achieve the countdown effect of Canvas" shared by the editor will be helpful to you. At the same time, I also hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!