Javascript jquery keyup 不起作用
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jquery keyup not working
提问by 1252748
For some reason, when I add a class to various inputs (after a user presses submit), this function does not record keypresses being made within those inputs. I must be doing something fundamentally wrong as I've tried $('incomplete_required').keyup(){}and what is below, as it seems .on()is more modern..
出于某种原因，当我向各种输入添加一个类时（在用户按下提交后），此函数不会记录在这些输入中进行的按键操作。我一定是在做一些根本错误的事情，因为我已经尝试过$('incomplete_required').keyup(){}以及下面的内容，因为它似乎.on()更现代..
$(document).ready(function(){
$('.incomplete_required').on("keyup", function(){
console.log('keyed');
});
});
What have I done wrong here?
我在这里做错了什么？
Thank you
谢谢
回答by ?????
If you are dynamically changing elements in the dom - it is best to delegate the event to an existing parent in the dom
如果您正在动态更改 dom 中的元素 - 最好将事件委托给 dom 中的现有父级
$(document).ready(function(){
$('body').on("keyup",'.incomplete_required', function(){
console.log('keyed');
});
});
Obviously replacing bodywith the closest parent element that exists on dom ready
显然替换body为 dom ready 上存在的最近的父元素
By delegating - the event will bubble up to the "parent" element - which is where the event is handled
通过委托 - 事件将冒泡到“父”元素 - 这是处理事件的地方
回答by Nope
Seeing this works before the submit I think you are loosing the event bindings as the elements are re-rendered but the document ready event is not firing again.
在提交之前看到这有效，我认为您正在失去事件绑定，因为元素被重新渲染，但文档就绪事件不会再次触发。
A dynamic binding solution may be required here:
这里可能需要动态绑定解决方案：
$(document).ready(function(){
$(document).on('keyup', '.incomplete_required', function(){
console.log('keyed');
});
});?
Mind you, documentis very far up so the closest static element will be better off course.
请注意，document距离很远，因此最接近的静态元素当然会更好。
