I have a site made up of various html pages in jQuery mobile. On one page I have a javascript function in the content. Upon going to another page, this function still exists. How can I remove it before displaying the next page?
I am using the following, which removes the dom elements on the previous page, but the javascript functions from the previous page are still available.
$('div').live('pageshow',function(event, ui) {
$(ui.prevPage).remove();
});
$('div').live('pagehide', function(event) {
$(event.target).remove();
});
Here's the full code of two pages. Upon clicking from page 1 to page 2, the function testContent which is only on page 1 still works.
Page 1
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Page 1</title>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.css" />
<script src="http://code.jquery.com/jquery-1.8.3.min.js"></script>
<script src="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.js"></script>
<script>
$('div').live('pageshow',function(event, ui) {
$(ui.prevPage).remove();
doPageShow();
});
$('div').live('pagehide', function(event) {
$(event.target).remove();
});
</script>
</head>
<body>
<div data-role="page" data-cache="never">
<div data-role="content">
<h1>Page 1z</h1>
<a href="page2.html">Page 2</a>
<div id="test"></div><!-- this div should be removed upon going to the next page -->
<script>
function testContent() {
// this function still exists on the next page, how can it be removed?
alert("testContent");
}
function doPageShow() {
alert("Page 1");
alert($("#test").length); // shows 1 which is correct
testContent(); // function is on this page, so it works
}
</script>
</div><!--content-->
</div><!--page-->
</body>
</html>
Page 2
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Page 1</title>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.css" />
<script src="http://code.jquery.com/jquery-1.8.3.min.js"></script>
<script src="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.js"></script>
<script>
$('div').live('pageshow',function(event, ui) {
$(ui.prevPage).remove();
doPageShow();
});
$('div').live('pagehide', function(event) {
$(event.target).remove();
});
</script>
</head>
<body>
<div data-role="page" data-cache="never">
<div data-role="content">
<h1>Page 2</h1>
<a href="page1.html">Page 1</a>
<script>
function doPageShow() {
alert("Page 2");
alert($("#test").length); // shows 0 which is correct
testContent(); // why does this still work???
}
</script>
</div><!--content-->
</div><!--page-->
</body>
</html>
pageshowusing.onand disable them onpagehideusing.off. Note that.liveis deprecated and replaced with.on.$(document).off("pageshow").on("pageshow", function () { //code });this will remove previous bindings. another option, use$.mobile.changePage("page1.html", { reloadPage: true });this will force reload page and removes previous objects and bindings.