deferredScript (OmniFaces VDL Documentation

Description:

DeferredScript is a component which defers the loading of the given script resource to the window load event. In other words, the given script resource is only loaded when the window is really finished with loading. So, the enduser can start working with the webpage without waiting for the additional scripts to be loaded. Usually, it are those kind of scripts which are just for progressive enhancement and thus not essential for the functioning of the webpage.
This will give bonus points with among others the Google PageSpeed tool, on the contrary to placing the script at bottom of body, or using defer="true" or even async="true".

Component Information
Info	Value
Component Type	`org.omnifaces.component.script.DeferredScript`
Handler Class	None
Renderer Type	None
Description	None

Attributes
Name	Required	Type	Description
`id`	`false`	`javax.el.ValueExpression` (must evaluate to `java.lang.String`)	The component identifier for this component. This value must be unique within the closest parent component that is a naming container.
`rendered`	`false`	`javax.el.ValueExpression` (must evaluate to `boolean`)	Flag indicating whether or not this component should be rendered (during Render Response Phase), or processed on any subsequent form submit. The default value for this property is true.
`binding`	`false`	`javax.el.ValueExpression` (must evaluate to `javax.faces.component.UIComponent`)	The `ValueExpression` linking this component to a property in a backing bean.
`library`	`false`	`javax.el.ValueExpression` (must evaluate to `java.lang.String`)	The "library name" part of the resource identifier.
`name`	`true`	`javax.el.ValueExpression` (must evaluate to `java.lang.String`)	The "resource name" part of the resource identifier.
`group`	`false`	`javax.el.ValueExpression` (must evaluate to `java.lang.String`)	The group name on which the deferred script resources should be combined by CombinedResourceHandler. All deferred scripts resources having the same combined group name will be combined into a single deferred script in the place where the first member of the group occurs in the component tree.
`onbegin`	`false`	`javax.el.ValueExpression` (must evaluate to `java.lang.String`)	JavaScript code to execute right before the script loading begins.
`onsuccess`	`false`	`javax.el.ValueExpression` (must evaluate to `java.lang.String`)	JavaScript code to execute when the script loading is successfully completed.
`onerror`	`false`	`javax.el.ValueExpression` (must evaluate to `java.lang.String`)	JavaScript code to execute when the script loading has failed.

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Tag deferredScript