How to pass JavaScript values to JSF EL and backing bean?

Question

I am doing JSF geolocation service where I need to pass latitude and longitude to bean for processing. HTML5 allows getting location with JavaScript, for example like is don

Answer 1

You need to realize that JSF runs at webserver and produces a bunch of HTML/CSS/JS code which get sent from webserver to webbrowser and that the webbrowser only runs HTML/CSS/JS. Rightclick the page in webbrowser and choose View Source. In place of the you'll see something like

In JS, you can easily grab HTML elements from the HTML DOM using document functions and alter it.

var input = document.getElementById('formid:inputid');
input.value = 'new value';

See also:

• Communication between Java/JSP/JSF and JavaScript