Home >Web Front-end >JS Tutorial >How to draw squares in javascript
How to draw squares in javascript: first create an HTML sample file; then add a canvas tag to the body; then add a script tag to the head for entering javascript code; finally draw the square through the draw method. Can.
The operating environment of this article: windows7 system, javascript1.8.5&&html5 version, Dell G3 computer.
Insert javascript into html to draw a rectangle
<!DOCTYPE <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>canvas元素示例</title>
<script>
function draw(id)
{
var canvas = document.getElementById(id);
if(canvas == null)
return false;
var context = canvas.getContext('2d');
context.fillStyle = "#eeefff";
context.fillRect(0,0,400,300);
context.fillStyle = "green";
context.strokeStyle = "red";
context.lineWidth = 1;
context.fillRect(50,50,100,100);
context.strokeRect(50,50,100,100);
}
</script>
</head>
<body οnlοad="draw('canvas');">
<h1>canvas中画矩形</h1>
<canvas id="canvas" width="400" height="300"/>
</body>
</html>
[Recommended learning: javascript advanced tutorial]
The above is the detailed content of How to draw squares in javascript. For more information, please follow other related articles on the PHP Chinese website!