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6ceb7ce1
编写于
4月 27, 2017
作者:
R
Robin Dupret
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Add a section with the different Ajax events [ci skip]
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guides/source/working_with_javascript_in_rails.md
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...
...
@@ -153,6 +153,9 @@ Unless you have disabled the Asset Pipeline,
provides the JavaScript half, and the regular Ruby view helpers add appropriate
tags to your DOM.
You can read below about the different events that are fired dealing with
remote elements inside your application.
### form_with
[
`form_with`
](
http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#method-i-form_with
)
...
...
@@ -242,6 +245,39 @@ this generates
Since it's just a
`<form>`
, all of the information on
`form_for`
also applies.
Dealing with Ajax events
------------------------
Here are the different events that are fired when you deal with elements
that have a
`data-remote`
attribute:
NOTE: All handlers bound to these events are always passed the event object as the
first argument. The table below describes the extra parameters passed after the
event argument. For exemple, if the extra parameters are listed as
`xhr, settings`
,
then to access them, you would define your handler with
`function(event, xhr, settings)`
.
| Event name | Extra parameters | Fired |
|---------------------|------------------|-------------------------------------------------------------|
|
`ajax:before`
| | Before the whole ajax business, aborts if stopped. |
|
`ajax:beforeSend`
| xhr, options | Before the request is sent, aborts if stopped. |
|
`ajax:send`
| xhr | When the request is sent. |
|
`ajax:success`
| xhr, status, err | After completion, if the response was a success. |
|
`ajax:error`
| xhr, status, err | After completion, if the response was an error. |
|
`ajax:complete`
| xhr, status | After the request has been completed, no matter the outcome.|
|
`ajax:aborted:file`
| elements | If there are non-blank file inputs, aborts if stopped. |
### Stoppable events
If you stop
`ajax:before`
or
`ajax:beforeSend`
by returning false from the
handler method, the Ajax request will never take place. The
`ajax:before`
event
is also useful for manipulating form data before serialization. The
`ajax:beforeSend`
event is also useful for adding custom request headers.
If you stop the
`ajax:aborted:file`
event, the default behavior of allowing the
browser to submit the form via normal means (i.e. non-AJAX submission) will be
canceled and the form will not be submitted at all. This is useful for
implementing your own AJAX file upload workaround.
Server-Side Concerns
--------------------
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