当前位置: 首页>>代码示例 >>用法及示例精选 >>正文


HTML canvas lineWidth用法及代码示例


HTML canvas lineWidth属性用于设置或返回线的宽度(线的厚度)。线的宽度以像素为单位设置。此属性的默认值为1。

用法:

context.lineWidth = number;

属性值:


  • number:该属性值指示以像素为单位指定线宽的数字。此属性忽略零,负,无穷和NaN值。

范例1:

<!DOCTYPE html> 
<html> 
  
<head>  
    <title>  
        HTML canvas lineWidth Property 
    </title>  
</head>  
  
<body style = "text-align:center;"> 
      
    <h1 style="color:green">  
        GeeksforGeeks  
    </h1>  
      
    <h2>  
        HTML canvas lineWidth() Property  
    </h2>  
  
    <canvas id="canvas" width="350" height="380"></canvas> 
  
    <script> 
        var canv = document.getElementById("canvas"); 
        var context = canv.getContext("2d"); 
        context.beginPath(); 
        context.lineWidth = 20; 
        context.moveTo(40, 40); 
        context.lineTo(200, 150); 
        context.lineTo(40, 200); 
        context.strokeStyle = "green"; 
        context.stroke(); 
    </script> 
</body> 
  
</html>                    

输出:

程序2:

<!DOCTYPE html> 
<html> 
  
<head>  
    <title>  
        HTML canvas lineWidth Property 
    </title>  
</head>  
  
<body style = "text-align:center;"> 
      
    <h1 style="color:green">  
        GeeksforGeeks  
    </h1>  
      
    <h2>  
        HTML canvas lineWidth() Property  
    </h2>  
  
    <canvas id="canvas" width="350" height="380"></canvas> 
  
    <script> 
        var canv = document.getElementById("canvas"); 
        var context = canv.getContext("2d"); 
        context.beginPath(); 
        context.lineWidth = 10; 
        context.strokeStyle ="green"; 
        context.strokeRect(110, 40, 120, 100); 
    </script> 
</body> 
  
</html>                    

输出:

支持的浏览器:下面列出了HTML canvas lineWidth属性支持的浏览器:

  • 谷歌浏览器
  • Internet Explorer 9.0
  • 火狐浏览器
  • 苹果浏览器
  • Opera


相关用法


注:本文由纯净天空筛选整理自IshwarGupta大神的英文原创作品 HTML | canvas lineWidth Property。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。