问题
I'm looking for a way to sanitize input that I paste into the browser, is this possible to do with jQuery?
I've managed to come up with this so far:
$(this).live(pasteEventName, function(e) {
// this is where i would like to sanitize my input
return false;
}
Unfortunately my development has come to a screeching hold because of this "minor" issue. I would really make me a happy camper if someone could point me to the right direction.
回答1:
OK, just bumped into the same issue.. I went around the long way
$('input').on('paste', function () {
var element = this;
setTimeout(function () {
var text = $(element).val();
// do something with text
}, 100);
});
Just a small timeout till .val() func can get populated.
E.
回答2:
You can actually grab the value straight from the event. Its a bit obtuse how to get to it though.
Return false if you don't want it to go through.
$(this).on('paste', function(e) {
var pasteData = e.originalEvent.clipboardData.getData('text')
});
回答3:
For cross platform compatibility, it should handle oninput and onpropertychange events:
$ (something).bind ("input propertychange", function (e) {
// check for paste as in example above and
// do something
})
回答4:
I sort of fixed it by using the following code:
$("#editor").live('input paste',function(e){
if(e.target.id == 'editor') {
$('<textarea></textarea>').attr('id', 'paste').appendTo('#editMode');
$("#paste").focus();
setTimeout($(this).paste, 250);
}
});
Now I just need to store the caret location and append to that position then I'm all set... I think :)
回答5:
Hmm... I think you can use e.clipboardData to catch the data being pasted. If it doesn't pan out, have a look here.
$(this).live("paste", function(e) {
alert(e.clipboardData); // [object Clipboard]
});
回答6:
Listen for the paste event and set a keyup event listener. On keyup, capture the value and remove the keyup event listener.
$('.inputTextArea').bind('paste', function (e){
$(e.target).keyup(getInput);
});
function getInput(e){
var inputText = $(e.target).val();
$(e.target).unbind('keyup');
}
回答7:
This is getting closer to what you might want.
function sanitize(s) {
return s.replace(/\bfoo\b/g, "~");
};
$(function() {
$(":text, textarea").bind("input paste", function(e) {
try {
clipboardData.setData("text",
sanitize(clipboardData.getData("text"))
);
} catch (e) {
$(this).val( sanitize( $(this).val() ) );
}
});
});
Please note that when clipboardData object is not found (on browsers other then IE) you are currently getting the element's full value + the clipboard'ed value.
You can probably do some extra steps to dif the two values, before an input & after the input, if you really are only after what data was truly pasted into the element.
回答8:
$("#textboxid").on('input propertychange', function () {
//perform operation
});
It will work fine.
回答9:
How about comparing the original value of the field and the changed value of the field and deducting the difference as the pasted value? This catches the pasted text correctly even if there is existing text in the field.
http://jsfiddle.net/6b7sK/
function text_diff(first, second) {
var start = 0;
while (start < first.length && first[start] == second[start]) {
++start;
}
var end = 0;
while (first.length - end > start && first[first.length - end - 1] == second[second.length - end - 1]) {
++end;
}
end = second.length - end;
return second.substr(start, end - start);
}
$('textarea').bind('paste', function () {
var self = $(this);
var orig = self.val();
setTimeout(function () {
var pasted = text_diff(orig, $(self).val());
console.log(pasted);
});
});
回答10:
$('').bind('input propertychange', function() {....});
This will work for mouse paste event.
回答11:
This code is working for me either paste from right click or direct copy paste
$('.textbox').on('paste input propertychange', function (e) {
$(this).val( $(this).val().replace(/[^0-9.]/g, '') );
})
When i paste Section 1: Labour Cost it becomes 1 in text box.
To allow only float value i use this code
//only decimal
$('.textbox').keypress(function(e) {
if(e.which == 46 && $(this).val().indexOf('.') != -1) {
e.preventDefault();
}
if (e.which == 8 || e.which == 46) {
return true;
} else if ( e.which < 48 || e.which > 57) {
e.preventDefault();
}
});
回答12:
document.addEventListener('paste', function(e){
if(e.clipboardData.types.indexOf('text/html') > -1){
processDataFromClipboard(e.clipboardData.getData('text/html'));
e.preventDefault();
...
}
});
Further:
- Clipboard API and events
回答13:
See this example: http://www.p2e.dk/diverse/detectPaste.htm
It essentialy tracks every change with oninput event and then checks if it’s a paste by string comparison. Oh, and in IE there’s an onpaste event. So:
$ (something).bind ("input paste", function (e) {
// check for paste as in example above and
// do something
})
回答14:
This method uses jqueries contents().unwrap().
- First, detect the paste event
- Add a unique class to the tags that are already in the element into which we are pasting.
After a given timeout scan through all the contents unwrapping tags that don't have the class that you set earlier. Note: This method does not remove self closing tags like
See an example below.//find all children .find('*') and add the class .within .addClass("within") to all tags $('#answer_text').find('*').each(function () { $(this).addClass("within"); }); setTimeout(function() { $('#answer_text').find('*').each(function () { //if the current child does not have the specified class unwrap its contents $(this).not(".within").contents().unwrap(); }); }, 0);
回答15:
This proved to be quite illusive. The value of the input is not updated prior to the execution of the code inside the paste event function. I tried calling other events from within the paste event function but the input value is still not updated with the pasted text inside the function of any events. That is all events apart from keyup. If you call keyup from within the paste event function you can sanitize the pasted text from within the keyup event function. like so...
$(':input').live
(
'input paste',
function(e)
{
$(this).keyup();
}
);
$(':input').live
(
'keyup',
function(e)
{
// sanitize pasted text here
}
);
There is one caveat here. In Firefox, if you reset the input text on every keyup, if the text is longer than the viewable area allowed by the input width, then resetting the value on every keyup breaks the browser functionality that auto scrolls the text to the caret position at the end of the text. Instead the text scrolls back to the beginning leaving the caret out of view.
回答16:
Script to remove special characters from all fields with class portlet-form-input-field:
// Remove special chars from input field on paste
jQuery('.portlet-form-input-field').bind('paste', function(e) {
var textInput = jQuery(this);
setTimeout(function() {
textInput.val(replaceSingleEndOfLineCharactersInString(textInput.val()));
}, 200);
});
function replaceSingleEndOfLineCharactersInString(value) {
<%
// deal with end-of-line characters (\n or \r\n) that will affect string length calculation,
// also remove all non-printable control characters that can cause XML validation errors
%>
if (value != "") {
value = value.replace(/(\x00|\x01|\x02|\x03|\x04|\x05|\x06|\x07|\x08|\x0B|\x0C|\x0E|\x0F|\x10|\x11|\x12|\x13|\x14|\x15|\x16|\x17|\x18|\x19|\x1A|\x1B|\x1C|\x1D|\x1E|\x1F|\x7F)/gm,'');
return value = value.replace(/(\r\n|\n|\r)/gm,'##').replace(/(\#\#)/gm,"\r\n");
}
}
回答17:
There is one caveat here. In Firefox, if you reset the input text on every keyup, if the text is longer than the viewable area allowed by the input width, then resetting the value on every keyup breaks the browser functionality that auto scrolls the text to the caret position at the end of the text. Instead the text scrolls back to the beginning leaving the caret out of view.
function scroll(elementToBeScrolled)
{
//this will reset the scroll to the bottom of the viewable area.
elementToBeScrolled.topscroll = elementToBeScrolled.scrollheight;
}
来源：https://stackoverflow.com/questions/686995/catch-paste-input