Question

<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function onPasteMe(pObj) 
{     
// validate  pasted text     
var input  = window.clipboardData.getData('Text'); 
document.getElementById("txt1").value = input ;
var m= stripCharacters(input,pObj) ;
    if(m)
    {
 input=input.replace(/[\s]/g,'\r'); 
 var n=input.split(/\r/g).length; 
 alert(n);
    }
  }

function stripCharacters(input,pObj) {
var r = new RegExp("[^\\s\\r\\t\\n0-9]", "g");
var find = input.match(r) ;      
if(find)
   {   
 alert('String contains both alpha-numeric or your pre-defined special characters!');  
 pObj.innerHTML = ""; 
 return false; 
   }
 return true; 
}
</script>
</head>
<body>
<textarea cols=19 id = "txt1" onPaste="onPasteMe(this);"></textarea>
</body>
</html>

如果我在文本区域中粘贴数字，如1233445，粘贴的值应出现在文本区域中，但如果我粘贴了像assdfsdf 123243'或2313adsdad这样的值，则文本区域应自动清除???

i used below codes but its not worked for me please help,
pObj.innerHTML = "";
document.getElementById("txt1").value ="";

Answer 1

<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function onPasteMe(pObj) 
{     
// validate  pasted text     
var input  = window.clipboardData.getData('Text'); 
document.getElementById("txt1").value = input ;
var m= stripCharacters(input,pObj) ;
    if(m)
    {
 input=input.replace(/[\s]/g,'\r'); 
 var n=input.split(/\r/g).length; 
 alert(n);
    }
    return false;
  }

function stripCharacters(input,pObj) {
var r = new RegExp("[^\\s\\r\\t\\n0-9]", "g");
var find = input.match(r) ;      
if(find)
   {   
 alert('String contains both alpha-numeric or your pre-defined special characters!');  
 pObj.value = ""; 
 return false; 
   }
 return true; 
}
</script>
</head>
<body>
<textarea cols=19 id = "txt1" onPaste="return onPasteMe(this);"></textarea>
</body>
</html>

你应该使用pObj.value =“”来清空textarea。
你需要为onPaste（）函数返回false。

Answer 2

首先，onPaste不完全支持
参考：JavaScript get clipboard data on paste event (Cross browser)

如何在onpaste方法中清除textarea？

2 个答案: