javascript Textarea：是否可以检测到失去焦点
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Textarea: can it detect the loss of focus
提问by sazr
In HTML or Javascript is it possible to detect when a textarea looses focus?
在 HTML 或 Javascript 中，是否可以检测 textarea 何时失去焦点？
I have a text area & on loosing focus I want to read the data in a textarea & check if its valid.
我有一个文本区域，并且在失去焦点时我想读取文本区域中的数据并检查其是否有效。
Maybe...
或许...
<textarea onloosefocus="myFunct();">
</textarea>
// or
var isTyping = false;
function onKeyUp( event )
{
setTimeout( function()
{
isTyping = false;
}, 100);
setTimeout( function()
{
if (!isTyping)
validateTextArea();
}, 500);
}
function onKeyDown( event )
{
isTyping = true;
}
<textarea onkeydown="onKeyDown(e);" onkeyup="onKeyUp(e);">
</textarea>
回答by ThiefMaster
The event you are looking for is the blurevent, available through the onblurattribute:
您正在寻找的blur事件是事件，可通过onblur属性获得：
<textarea onblur="myFunct();"></textarea>
However, it's much better if you attach events properly, e.g. through jQuery:
但是，如果您正确附加事件，则更好，例如通过 jQuery：
$('#id_of_your_textarea').on('blur', function(e) {
// your code here
});
回答by Matthew
You can also use the onblurattribute for the textarea if you don't have access to jquery
onblur如果您无权访问 jquery，也可以使用textarea的属性
