根据textarea行调整TD高度 [英] Adjust TD height depending on textarea rows

问题描述

我在< td> 内有 rows =1的textarea，所以它占用了空的时候尽可能少的空间。

I have a textarea with rows="1" inside a <td>, so it takes up as little space as possible when empty.

现在我想知道，当用户按下回车键时，我最好如何扩展textarea？

Now I was wondering, how would I best "expand" the textarea when the user presses the enter key?

我已经提出了一个非常简单的 jsfiddle 来测试这个想法。不幸的是我对jsfiddle并不是很好，所以我不知道如何（或者是否）可以使用 .on（）或其他事件监听器，所以我只是提出了一个在jsfiddle运行时运行的一次性更新。

I have put up a very simple jsfiddle to test the idea. Unfortunately I am not very good with jsfiddle, so I did not know how (or if) is it possible to use .on() or other event listeners, so I have simply put up a one-time update that runs when the jsfiddle is ran.

到目前为止它有效，但我想知道是否有更好/更有效的方法来实现它。

So far it works, but I was wondering if there's a better/more efficient way to do it.

PS调用我想要使用的函数 keypress 然后这段代码找到其他

PS to call the function I was thinking to use keypress and then this code found here on SO

var code = (e.keyCode ? e.keyCode : e.which);
if(code == 13) { //Enter keycode
  //expand()
}

推荐答案

试试这个：

$('.expand').on('keypress', function (e) {

    var code = (e.keyCode ? e.keyCode : e.which);
    if (code == 13) {
        // Enter pressed... do anything here...
        var rows = $(this).attr('rows');
        var rowsNew = parseInt(rows) + 1;
        $(this).attr('rows', rowsNew);
    }
});

DEMO HERE

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