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How to implement printing in JS (detailed answer combined with code)

亚连

May 18, 2018 am 10:31 AM

javascriptWaycombine

The following is how I compiled for you how to implement printing in JS. Interested students can take a look.

1. How JS implements printing

Method 1: window.print()

window.print(); A print dialog box will pop up, printing the content in window.document.body.innerHTML , the following is an example of partial printing taken from the Internet. The disadvantage of this example is that printing will modify the content of the page.

<!DOCTYPE html>  
<html>  
<head>  
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
<title>局部打印案例</title>  
<script type="text/javascript">     
    function doPrint() {      
        bdhtml=window.document.body.innerHTML;      
        sprnstr="<!--startprint-->";      
        eprnstr="<!--endprint-->";      
        prnhtml=bdhtml.substr(bdhtml.indexOf(sprnstr)+17);      
        prnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr));      
        window.document.body.innerHTML=prnhtml;   
        window.print();      
}      
</script>  
</head>  
<body>  
<p>1不需要打印的地方</p>  
<p>2这里不要打印啊</p>  
<!--startprint--><!--注意要加上html里star和end的这两个标记-->  
<h1 id="打印标题">打印标题</h1>  
<p>打印内容~~</p>  
<!--endprint-->  
<button type="button" onclick="doPrint()">打印</button>  
<p>不打印的地方啊哈哈哈哈</p>  
<p>2</p>  
</body>  
</html>  
[javascript] view plain copy
<!DOCTYPE html>  
<html>  
<head>  
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
<title>局部打印案例</title>  
<script type="text/javascript">     
    function doPrint() {      
        bdhtml=window.document.body.innerHTML;      
        sprnstr="<!--startprint-->";      
        eprnstr="<!--endprint-->";      
        prnhtml=bdhtml.substr(bdhtml.indexOf(sprnstr)+17);      
        prnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr));      
        window.document.body.innerHTML=prnhtml;   
        window.print();      
}      
</script>  
</head>  
<body>  
<p>1不需要打印的地方</p>  
<p>2这里不要打印啊</p>  
<!--startprint--><!--注意要加上html里star和end的这两个标记-->  
<h1 id="打印标题">打印标题</h1>  
<p>打印内容~~</p>  
<!--endprint-->  
<button type="button" onclick="doPrint()">打印</button>  
<p>不打印的地方啊哈哈哈哈</p>  
<p>2</p>  
</body>  
</html>

Method 2: Use the html tag

This method is only compatible with IE, other browsers It cannot be used. At the same time, it can only be used by browsers below IE10. The calling method is as follows:

<body>  
    <object id="WebBrowser" classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height="0" width="0"> </object>  
</body>  
<script>  
    WebBrowser.ExecWB(1,1)  //打开   
    WebBrowser.ExecWB(2,1)  //关闭现在所有的IE窗口，并打开一个新窗口   
    WebBrowser.ExecWB(4,1)  //保存网页  
    //--------------- 常用 ---------------      
    WebBrowser.ExecWB(6,1)  //打印   
    WebBrowser.ExecWB(7,1)  //打印预览   
    WebBrowser.ExecWB(8,1)  //打印页面设置   
    //-------------------------------------   
    WebBrowser.ExecWB(10,1) //查看页面属性   
    WebBrowser.ExecWB(15,1) //撤销   
    WebBrowser.ExecWB(17,1) //全选   
    WebBrowser.ExecWB(22,1) //刷新   
    WebBrowser.ExecWB(45,1) //关闭窗体无提示  
</script>  
<body>  
    <object id="WebBrowser" classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height="0" width="0"> </object>  
</body>  
<script>  
    WebBrowser.ExecWB(1,1)  //打开   
    WebBrowser.ExecWB(2,1)  //关闭现在所有的IE窗口，并打开一个新窗口   
    WebBrowser.ExecWB(4,1)  //保存网页  
    //--------------- 常用 ---------------      
    WebBrowser.ExecWB(6,1)  //打印   
    WebBrowser.ExecWB(7,1)  //打印预览   
    WebBrowser.ExecWB(8,1)  //打印页面设置   
    //-------------------------------------   
    WebBrowser.ExecWB(10,1) //查看页面属性   
    WebBrowser.ExecWB(15,1) //撤销   
    WebBrowser.ExecWB(17,1) //全选   
    WebBrowser.ExecWB(22,1) //刷新   
    WebBrowser.ExecWB(45,1) //关闭窗体无提示  
</script>

The advantage of this method is that a print preview can pop up under IE. This is a very user-friendly function for printing, but unfortunately Later versions of IE browsers do not support WebBrowser

Method 3: Use document.execCommand(”print”)

This method is also compatible Various versions of browsers, like window.print(), start the print dialog box. Chrome's print dialog box comes with a preview function, but IE and Firefox only pop up the print settings dialog box without a preview function.

The above is the method I compiled for you on how to implement printing in JS. I hope it will be helpful to you in the future.

About simple operations for downloading files in js (code attached, detailed answers)

function in js For questions about !, the code is attached

Detailed explanation of how JS interacts with the app (code attached)

The above is the detailed content of How to implement printing in JS (detailed answer combined with code). For more information, please follow other related articles on the PHP Chinese website!

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