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 <h:inputText> you'll see something like

<input type="text" id="formid:inputid" />

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