Rails UJS“on”用于处理ajax事件 [英] Rails UJS "on" for handling ajax event

问题描述

我在Rails应用程序中使用jQuery方法on将事件附加到并不总是存在的表单上。当#myForm附加到文档时，似乎没有附加事件处理程序。

I'm using the jQuery method "on" in a Rails app to attach an event on a form which doesn't always exist. It doesn't seem to be attaching an event handler when #myForm is appended to the document.

这是UJS建议的用法（） ：

$("#myForm").on("ajax:complete", function(xhr, status) { ... }

以下是我通常如何实现jQuery的 on（），但这似乎不起作用：

Here is how I usually implement jQuery's on(), but this does not seem to work:

$("body").on("ajax:complete", "#myForm", function(xhr, status) {...}

Rails UJS wiki： https://github.com/rails/jquery-ujs / wiki / ajax

Rails UJS wiki: https://github.com/rails/jquery-ujs/wiki/ajax

推荐答案

UJS与没有多大关系on function。这是由jQuery提供的，它需要多种形式.UJS只需触发 ajax：complete 事件，这样你就可以自己挂钩了。

UJS doesn't really have much to do with the on function. That's provided by jQuery, and it takes multiple forms. UJS simply fires the ajax:complete event so you can hook into it yourself.

选择器参数是可选的，所以

$(...).on("ajax:complete", function(xhr, status) { ... }

和

$(...).on("ajax:complete", "form", function(xhr, status) { ... }

是有效用途，但它们的工作方式有所不同。

are valid uses, though they work somewhat differently.

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