For those of us who've been using HTML5 for a long time, it's been a bit frustrating to step back to those old divs. Now we finally have the element we've been waiting for <main>. Now look at our page.
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<header>
<h1>This is the header</h1>
</header>
<main>
<p>The main content</p>
</main>
<footer>Copyright mine</footer>
</body>
</html>
Wednesday, 26 June 2013
Monday, 17 June 2013
Your first jQuery plugin
Here is a quick tutorial in how to create a jQuery plugin. Below is my basic page with a call to:
A file called 'first.plugin.js' containing the plugin (in red).
A call to a method called 'changetored' within that plugin (in blue).
<!DOCTYPE html>
<html lang="en">
<head>
<title>First jquery plugin test page</title>
<script src="http://www.google.com/jsapi"></script>
<script>
google.load("jquery", "1");
</script>
<style>
.red
{
color:red;
}
</style>
</head>
<body>
<p>First paragraph</p>
<p>Second paragraph</p>
<p>Third paragraph</p>
</body>
<!-- Call the plugin -->
<script src="first.plugin.js"></script>
<script>
(function()
{
/*
* changetored is a method declared in first.plugin.js
*/
$('p').changetored();
})();
</script>
</html>
Now for the plugin. Here is the file 'first.plugin.js'.
(function($)
{
$.fn.changetored = function()
{
/*
* In the context of a call like $('p').changetored();
* $(this) would become all paragraphs
*/
$(this).addClass('red');
};
})(jQuery);
A file called 'first.plugin.js' containing the plugin (in red).
A call to a method called 'changetored' within that plugin (in blue).
<!DOCTYPE html>
<html lang="en">
<head>
<title>First jquery plugin test page</title>
<script src="http://www.google.com/jsapi"></script>
<script>
google.load("jquery", "1");
</script>
<style>
.red
{
color:red;
}
</style>
</head>
<body>
<p>First paragraph</p>
<p>Second paragraph</p>
<p>Third paragraph</p>
</body>
<!-- Call the plugin -->
<script src="first.plugin.js"></script>
<script>
(function()
{
/*
* changetored is a method declared in first.plugin.js
*/
$('p').changetored();
})();
</script>
</html>
Now for the plugin. Here is the file 'first.plugin.js'.
(function($)
{
$.fn.changetored = function()
{
/*
* In the context of a call like $('p').changetored();
* $(this) would become all paragraphs
*/
$(this).addClass('red');
};
})(jQuery);
Catching browser buttons
I was recently putting together an application. My test user did something I wasn't expecting. Rather than using the buttons within the application, he went for the browser buttons. It prompted me to provide a warning for the user that the application wouldn't work so well if he did this. See code below:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Test page</title>
<script src="http://www.google.com/jsapi"></script>
<script>
google.load("jquery", "1");
</script>
</head>
<body>
<a href="index2.php">Go to page 2</a>
<script>
(function()
{
catchBrowser = true;
$('a').click(function()
{
catchBrowser = false;
});
$(window).bind('beforeunload', function()
{
if(catchBrowser == true)
{
return 'Please use only the buttons within the application pages.';
}
else
{
return;
}
});
})();
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<title>Test page</title>
<script src="http://www.google.com/jsapi"></script>
<script>
google.load("jquery", "1");
</script>
</head>
<body>
<a href="index2.php">Go to page 2</a>
<script>
(function()
{
catchBrowser = true;
$('a').click(function()
{
catchBrowser = false;
});
$(window).bind('beforeunload', function()
{
if(catchBrowser == true)
{
return 'Please use only the buttons within the application pages.';
}
else
{
return;
}
});
})();
</script>
</body>
</html>
Wednesday, 12 June 2013
Removing Twitter Bootstrap modal link outlines
Developers who use Twitter Bootstrap may have noticed a problem when they use the navigation controls to launch a modal. This could be a link at the top which launches a contact form for example. The problem is, that an outline to the link is left behind. I've seen a few 'solutions' to this on the web. None of which worked for me, because they were CSS solutions and the outline is created using JavaScript. So, here's what a link required to launch a modal looks like:
<a href="#myModal" data-toggle="modal">Launch modal</a>
And here is some coding for the modal:
<div id="myModal" class="modal hide fade" role="dialog">
<p>Hello</p>
<button class="btn btn-primary">Save</button>
</div>
</div>
Now, at last is the solution. Because, JavaScript creates the problem, it's a good idea to use JavaScript (in my case jQuery) to resolve it. The code should look like this:
(function()
{
$('a').data('toggle','modal').click(function()
{
$(this).css(
{
'outline':'none'
});
});
})();
Good luck.
<a href="#myModal" data-toggle="modal">Launch modal</a>
And here is some coding for the modal:
<div id="myModal" class="modal hide fade" role="dialog">
<p>Hello</p>
<button class="btn btn-primary">Save</button>
</div>
</div>
Now, at last is the solution. Because, JavaScript creates the problem, it's a good idea to use JavaScript (in my case jQuery) to resolve it. The code should look like this:
(function()
{
$('a').data('toggle','modal').click(function()
{
$(this).css(
{
'outline':'none'
});
});
})();
Good luck.
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