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.
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