Home > Article > Web Front-end > How to draw a rectangle with js+canvas_javascript skills
The example in this article describes the method of drawing a rectangle with js+canvas. Share it with everyone for your reference, the details are as follows:
The screenshot of the running effect is as follows:
The specific code is as follows:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>canvas绘制矩形</title> <script type="text/javascript" > function draw(id) { var canvas = document.getElementById("canvas"); if (canvas) { var context = canvas.getContext("2d"); context.fillStyle = "#DDDDDD"; context.fillRect(0, 0, 400, 400); context.strokeStyle = "black"; context.fillStyle = "gray"; context.lineWidth = 5; context.fillRect(0,0,200,300); context.strokeRect(0,0,200,200); } else { return; } } function drawBorder(id) { var canvas = document.getElementById("canvas2"); if (canvas) { var context = canvas.getContext("2d"); context.fillStyle = "red"; context.strokeStyle = "black"; context.lineWidth = 5; context.fillRect(0,0, 300, 200); context.strokeRect(0,0,300,200); } else { return; } } window.onload = function () { draw("canvas"); drawBorder("canvas2"); } </script> </head> <body> <canvas id="canvas" width="400" style="background:red;" height="400"></canvas> <hr /> <canvas id="canvas2" width="400" height="400"></canvas> </body> </html>
Readers who are interested in more JavaScript-related content can check out the special topics on this site: "Summary of JavaScript animation special effects and techniques" and "Summary of JavaScript motion effects and techniques"
I hope this article will be helpful to everyone in JavaScript programming.