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                <span>2021-02-06 14:53</span>
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<p>I think must be like this:</p>

<pre><code>$('div').keyup(function(e){ 
   $('textarea').val($(this).text().replace('<br>',/\r\n/ig)); 
}); 
$('textarea').keyup(function(e){ 
        $('div').html($(this).val().replace(/\r\n/ig, '<br>')); 
}); 
</code></pre>
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                <span>2021-02-06 14:57</span>
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<p>You can do two things:<br>
You can use the nobr tag<br>
You can also add the style attribute:</p>

<pre><code><div style="display:inline;"></div>
</code></pre>
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                <span>2021-02-06 14:58</span>
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<p>try taking a look at this question perhaps?  slightly different situation as he's trying to communicate to the server, but i think the answer should be similar.</p>

<p>this code was previously posted by Gert G, but it seems to have disappeared.  the code below seems to work flawlessly, so rep to Gert G on this one.</p>

<pre><code>  $('div').keydown(function(){
    $('textarea').val($(this).html());
  });

  $('textarea').keydown(function(){
    $('div').html($(this).val().replace(/\n/g,"<br />"));
  })
</code></pre>
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                <span>2021-02-06 15:01</span>
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<p>This code works in Firefox:</p>

<pre><code>$(document).ready(function(){ 
  $('div').keydown(function(){
    $('textarea').val($(this).html().replace(/<br>/g,"\n"));
  });

  $('textarea').keydown(function(){
    $('div').html($(this).val().replace(/\n/g,"<br>"));
  })
});
</code></pre>

<p>Then, if you're using Opera, the browser makes line breaks as <code><p>....</p></code>. IE, which Reigel probably use, probably adds those <code><div>...</div></code> tags. Seems there's no real standard way on how to handle line breaks when the DIV tag is contenteditable.</p>
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<p>It'd be easiest to use phpjs.org's nl2br function:
http://phpjs.org/functions/nl2br:480</p>

<hr>

<p>EDIT (fully working -- tested)</p>

<p>I tested this on your fiddle and it worked:</p>

<pre><code>$('div').keyup(function(){
    $('textarea').val( $(this).html().replace( /<br>/g, '\n' ) );
   //$('textarea').val($(this).html()) // also not working as expected
});
$('textarea').keyup(function(){
    $('div').html( nl2br( $(this).val(), 0 ) )
});

function nl2br (str, is_xhtml) {
    // Converts newlines to HTML line breaks  
    //
    // version: 1004.2314
    // discuss at: http://phpjs.org/functions/nl2br    // +   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\nvan\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: '\nOne\nTwo\n\nThree\n'    
    var breakTag = (is_xhtml || typeof is_xhtml === 'undefined') ? '' : '<br>';

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