nl2br() equivalent in javascript

Possible Duplicate:
jQuery convert line breaks to br (nl2br equivalent)

Currently I add <BR> for each evt.which == 13. Is there a nl2br() for JavaScript, so I can do away with this evt.which == 13?

How different is this from php.js

$('#TextArea').keypress(function(evt) {


if (evt.which == 13) {


var range           = $('#TextArea').getSelection();
var image_selection = range.text;


$('#TextArea').replaceSelection('<BR>');
$('#TextArea1').html($('#TextArea').val());
}
});
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最佳答案

Take a look at nl2br on php.js which seems exactly what you're looking for. Basically, it's:

function nl2br (str, is_xhtml) {
if (typeof str === 'undefined' || str === null) {
return '';
}
var breakTag = (is_xhtml || typeof is_xhtml === 'undefined') ? '<br />' : '<br>';
return (str + '').replace(/([^>\r\n]?)(\r\n|\n\r|\r|\n)/g, '$1' + breakTag + '$2');
}

EDIT:
your example using nl2br() may be changed like this:

$('#TextArea').keypress(function(evt){
$('#TextArea1').html(nl2br($('#TextArea').val()));
});

(note that this updates #TextArea1 on every keypress and doesn't change the value of #TextArea wich is what I think you're looking for, but I might be misunderstanding)

EDIT2:
If you want to get the behaviour of your old function (with inserting <br/>s to #TextArea) do this:

$('#TextArea').keypress(function(evt){
$('#TextArea').html(nl2br($('#TextArea').val())); // replace linebreaks first
$('#TextArea1').html($('#TextArea').val()); // copy to #TextArea1
});
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Here is a function nl2br in php.js.

function nl2br (str, is_xhtml) {
// http://kevin.vanzonneveld.net
// +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// +   improved by: Philip Peterson
// +   improved by: Onno Marsman
// +   improved by: Atli Þór
// +   bugfixed by: Onno Marsman
// +      input by: Brett Zamir (http://brett-zamir.me)
// +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// +   improved by: Brett Zamir (http://brett-zamir.me)
// +   improved by: Maximusya
// *     example 1: nl2br('Kevin\nvan\nZonneveld');
// *     returns 1: 'Kevin<br />\nvan<br />\nZonneveld'
// *     example 2: nl2br("\nOne\nTwo\n\nThree\n", false);
// *     returns 2: '<br>\nOne<br>\nTwo<br>\n<br>\nThree<br>\n'
// *     example 3: nl2br("\nOne\nTwo\n\nThree\n", true);
// *     returns 3: '<br />\nOne<br />\nTwo<br />\n<br />\nThree<br />\n'
var breakTag = (is_xhtml || typeof is_xhtml === 'undefined') ? '<br ' + '/>' : '<br>'; // Adjust comment to avoid issue on phpjs.org display


return (str + '').replace(/([^>\r\n]?)(\r\n|\n\r|\r|\n)/g, '$1' + breakTag + '$2');
}

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