Table of Contents
How is JavaScript impacting your page load time?
The variability in device power is incredibly wide, especially on mobile. What might take just a second to parse, compile, and evaluate on the top-end iPhone might take 4-5 times longer on an “average” mobile device, and 10-20 times longer on a low-power device.
How to invoke JSF managed bean action on page load overflow?
DD. Just put the desired logic in the constructor of the request scoped bean associated with the JSF page. public Bean () { // Do your stuff here. } Use @PostConstruct annotated method on a request or view scoped bean. It will be executed after construction and initialization/setting of all managed properties and injected dependencies.
How to execute an initialization method in JSF?
This tutorial show how to execute a initialization method before the page is loaded in JSF. View parameters are not yet available in the @PostConstruct phase. JSF PreRenderView tackles this problem, you can address this problem by attaching the preRenderView event listener where you can do some custom initialization.
When to fire bean action in JSF 2.0?
Another easy way is to use fire the method before the view is rendered. This is better than postConstruct because for sessionScope, postConstruct will fire only once every session. This will fire every time the page is loaded. This is ofcourse only for JSF 2.0 and not for JSF 1.2.
How to reduce the impact of JavaScript on your page load time?
Once a browser has downloaded a script, there are several more steps, which all still contribute to the overall resource usage and speed of a page. The way most modern browsers’ JavaScript engines actually run a script can be (roughly) reduced to three main phases: parsing, compilation, and execution.
DD. Just put the desired logic in the constructor of the request scoped bean associated with the JSF page. public Bean () { // Do your stuff here. } Use @PostConstruct annotated method on a request or view scoped bean. It will be executed after construction and initialization/setting of all managed properties and injected dependencies.
How to check page load time in JavaScript?
For getting the page load times of visitors to your site out in the real world, you’ll want to use Real User Monitoring (aka RUM) page load metrics. I would recommend looking into the NavigationTiming spec.
How to register a prerenderview in JSF?
Passing a parameter using the element. We can register a preRenderView type on the element which registers a initialization listener to do some initialization on load of the page.