jQuery Mobile - Prevent page navigation after changepage event is triggered - jquery-mobile

Question

Basically the use case is this:
I have a form that the user is filling out a form and accidentally click another link. In the pagebeforehide event, I want to stop the navigation. I tried to do
event.stopPropagation();
event.preventDefault();
but neither of them stop the navigation from happening. Does anyone have any idea how to do this? It's not immediately clear how to handle this.

Answer 1

event.preventDefault(); should work if all your code is in the right places. Here is a simple example:
<div data-role="page" id="page1">
<div data-role="header" data-position="fixed" data-tap-toggle="false">
<h1>My page</h1>
</div>
<div role="main" class="ui-content">
<label for="text-basic">Type 1 to allow navigation:</label>
<input type="text" name="text-basic" id="text-basic" value="" />
<br /><br />
<a class="ui-btn" href="#page2">Go to page 2</a>
</div>
<div data-role="footer" data-position="fixed" data-tap-toggle="false">
<h1>My page footer</h1>
</div>
</div>
<div data-role="page" id="page2">
<div data-role="header" data-position="fixed" data-tap-toggle="false">
<h1>My page 2</h1>
</div>
<div role="main" class="ui-content">
page 2
<a class="ui-btn" href="#page1">Go back to page 1</a>
</div>
<div data-role="footer" data-position="fixed" data-tap-toggle="false">
<h1>My page footer</h1>
</div>
</div>
I have 2 pages and only want the user to go to page 2 if he/she types "1" into the text box.
$(document).on("pagecreate", "#page1", function(){
$( "body" ).on( "pagecontainerbeforetransition", function( event, ui ) {
var currPage = $( "body" ).pagecontainer( "getActivePage" ).prop("id");
if (currPage == "page1"){
var val = $("#text-basic").val();
if (val != "1") {
alert("you must enter 1 in the text box!");
event.preventDefault();
} else {
$("#text-basic").val("");
}
}
});
});
In the pagecontainer widget pagecontainerbeforetransition event, I see which page we are currently looking at, if it is page1, then check what the user has entered in the textbox. If I do not find the string "1", prevent navigation and alert the user.
Here is a working DEMO