JavaScriptDeferHeaderResponse (Wicket Core 9.0.0-M5 API)

java.lang.Object
- org.apache.wicket.markup.html.DecoratingHeaderResponse
- - org.apache.wicket.markup.head.filter.JavaScriptDeferHeaderResponse

All Implemented Interfaces:

Closeable, AutoCloseable, IHeaderResponse
```
public class JavaScriptDeferHeaderResponse
extends DecoratingHeaderResponse
```
A header response which defers all AbstractJavaScriptReferenceHeaderItems.
To prevent any error because of possible dependencies to referenced JavaScript files *all* JavaScriptHeaderItems are replaced with suitable implementations that delay any execution until all deferred AbstractJavaScriptReferenceHeaderItems have been loaded.
Note: This solution depends on the execution order of JavaScript in the browser: The 'DOMContentLoaded' event has to be fired after all deferred JavaScript resources have been loaded. This doesn't seem to be the case in all browsers, thus this class should be considered experimental.

Author:

svenmeier +

Constructor Summary

Constructors
Constructor Description

JavaScriptDeferHeaderResponse(IHeaderResponse response)
Decorate the given response.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`render(HeaderItem item)`	Renders the given `HeaderItem` to the response if none of its tokens has been rendered before.

Methods inherited from class org.apache.wicket.markup.html.DecoratingHeaderResponse
close, getRealResponse, getResponse, isClosed, markRendered, wasRendered

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - JavaScriptDeferHeaderResponse
```
public JavaScriptDeferHeaderResponse(IHeaderResponse response)
```
    Decorate the given response.
    
    Parameters:
    
    response -
- Method Detail
  - render
```
public void render(HeaderItem item)
```
    Description copied from interface: IHeaderResponse
    
    Renders the given HeaderItem to the response if none of its tokens has been rendered before.
    Automatically marks all item's tokens as rendered.
    
    Specified by:
    
    render in interface IHeaderResponse
    
    Overrides:
    
    render in class DecoratingHeaderResponse
    
    Parameters:
    
    item - The item to render.
    
    See Also:
    
    IHeaderResponse.markRendered(Object)