How can I execute Javascript before a JSF action is performed? [duplicate]

Answer 1

This never worked for me,

 onclick="if(confirm('Are you sure?')) return false;" />

but this did

onclick="if(confirm(\"Are you sure?\"))return true; else return false;"

Answer 2

In JSF 1.2 you can specify onclick events.

Also, other libraries such as MyFaces or IceFaces implement the "onclick" handler.

What you'd need to do then is simply:

<h:commandLink action="#{bean.action}" onclick="if(confirm('Are you sure?')) return false;" />

Note: you can't just do return confirm(...) as this will block the rest of the JavaScript in the onClick event from happening, which would effectively stop your action from happening no matter what the user returned!

Answer 3

If you want to execute something before the form is posted, for confirmation for example, try the form event onSubmit. Something like:

myform.onsubmit = function(){confirm("really really sure?")};

Answer 4

Can be simplified like this

onclick="return confirm('Are you sure?');"

Answer 5

This worked for me:

<h:commandButton title="#{bundle.NewPatient}" action="#{identifController.prepareCreate}"  
                                             id="newibutton" 
                                             onclick="if(confirm('#{bundle.NewPatient}?'))return true; else return false;" 
                                             value="#{bundle.NewPatient}"/>

Answer 6

var deleteClick;
var mess="xxx";
function assignDeleteClick(link) {
    if (link.onclick == confirmDelete) {
        return;
    }
    deleteClick = link.onclick;
    link.onclick = confirmDelete;
}


function confirmDelete() {
    var ans = confirm(mess);
    if (ans == true) {
        return deleteClick();
    } else {
        return false;
    }
} 

use this code for jsf 1.1.