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What are the ways to clear the canvas in html5

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Release: 2018-01-29 10:28:20
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This time I will bring you the methods of clearing the canvas in html5, and what are the precautions for clearing the canvas in html5. The following is a practical case, let's take a look.

Summarize the following three ways to clear the

canvas canvas:

1. The simplest method: Since the canvas height or width is reset every time When set, the canvas content will be cleared, so you can use the following method to clear it:

function clearCanvas<span style="font-family: Verdana, Arial, 宋体;">()</span> 
{ 
    var c=document.getElementById("myCanvas"); 
    var cxt=c.getContext("2d"); 
    c.height=c.height; 
}
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##2. Use the clearRect method:

function clearCanvas() 
{ 
    var c=document.getElementById("myCanvas"); 
    var cxt=c.getContext("2d"); 
    cxt.clearRect(0,0,c.width,c.height); 
}
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3. Similar to method 2, you can fill the canvas with a specific color to achieve the purpose of clearing it:

function clearCanvas() 
{ 
    var c=document.getElementById("myCanvas"); 
    var cxt=c.getContext("2d"); 
       
    cxt.fillStyle="#000000"; 
    cxt.beginPath(); 
    cxt.fillRect(0,0,c.width,c.height); 
    cxt.closePath(); 
}
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I believe you have mastered the method after reading these cases. Please pay attention for more exciting things. Other related articles on php Chinese website!

Related reading:

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How to solve a The background image of the label does not display this problem under IE8

The above is the detailed content of What are the ways to clear the canvas in html5. For more information, please follow other related articles on the PHP Chinese website!

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