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POjQuery: scroll textarea to given position
 

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  1. POjQuery: scroll textarea to given position
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    <p>I have a textarea with lots and lots of text:</p> <pre><code>&lt;textarea cols="50" rows="10" id="txt"&gt;lots and lots of text goes here&lt;/textarea&gt; </code></pre> <p>I want to scroll the textarea down, so the user can see 2000-th character. How can I do this using javasctipt/jQuery?</p> <pre><code>$('#txt').scrollToCharNo(2000); // something like this would be great </code></pre> <h3>EDIT (my solution)</h3> <p>Well, I managed to make it work myself. The only way I found, is to create a DIV with the same font and width as the textarea, put a SPAN near the needed character and find the position of that span.</p> <p>I am sure, that somebody might find my solution useful, so i'll paste it here:</p> <pre><code>jQuery.fn.scrollToText = function(search) { // getting given textarea contents var text = $(this).text(); // number of charecter we want to show var charNo = text.indexOf(search); // this SPAN will allow up to determine given charecter position var anch = '&lt;span id="anch"&gt;&lt;/span&gt;'; // inserting it after the character into the text text = text.substring(0, charNo) + anch + text.substring(charNo); // creating a DIV that is an exact copy of textarea var copyDiv = $('&lt;div&gt;&lt;/div&gt;') .append(text.replace(/\n/g, '&lt;br /&gt;')) // making newlines look the same .css('width', $(this).attr('clientWidth')) // width without scrollbar .css('font-size', $(this).css('font-size')) .css('font-family', $(this).css('font-family')) .css('padding', $(this).css('padding')); // inserting new div after textarea - this is needed beacuse .position() wont work on invisible elements copyDiv.insertAfter($(this)); // what is the position on SPAN relative to parent DIV? var pos = copyDiv.find('SPAN#anch').offset().top - copyDiv.find('SPAN#anch').closest('DIV').offset().top; // the text we are interested in should be at the middle of textearea when scrolling is done pos = pos - Math.round($(this).attr('clientHeight') / 2); // now, we know where to scroll! $(this).scrollTop(pos); // no need for DIV anymore copyDiv.remove(); }; $(function (){ $('#scroll_button').click( function() { // scrolling to "FIND ME" using function written above $('#txt').scrollToText('FIND ME'); return false; } ); }); </code></pre> <p>Here is a demo (it works!): <a href="http://jsfiddle.net/KrVJP/" rel="nofollow">http://jsfiddle.net/KrVJP/</a></p> <p>Since none of the answers actually solved the problem, I'll accept experimentX's one: thank you for putting an effort to help me, I appreciate it! </p>
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    1. COPlease check the following [question](http://stackoverflow.com/questions/642353/dynamically-scrolling-a-textarea). I think that will help you.
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    2. COI'm afraid there is no answer to my question. How do I know the position of 2000th character?
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    3. COWhy didn't you just post your own solution as an answer and accept that?
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