javascript - 获取文本区域中的行号

Question

<分区>

Answer 1

这适用于按钮点击。从 Find out the 'line' (row) number of the cursor in a textarea 被盗

​function getline()
{
    var t = $("#t")[0];
    alert(t.value.substr(0, t.selectionStart).split("\n").length);
}​

HTML

​<textarea rows="6" id="t">
there is no
love in the ghetto
so come here
and get it
</textarea>
<input type="button" onclick="getline()" value="get line" />​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​