Content “div” Height – Fill Page Height–Part 2

Omar has written a great article already on using JavaScript to size the jQM content DIV to fill the given device’s height; however there is one use case this does not cover. A user might want the footer to be visible and fixed  at the bottom of the page anytime the content of the page is shorter than the vertical space available, but once the content is long enough, the user might then want the footer to be “pushed” down so it appears below the content when the page is scrolled.

The part 1 article makes it so that the footer is always visible at the bottom of the page and the content div is scrolled. If instead we use a plain footer with no JavaScript and without the data-position fixed, the footer appears below the content, but if the content is less than the vertical space available, the footer appears in the middle of the page:

floatingFooter

Using data-position=”fixed” on the footer stops the footer from appearing in the middle of the page, but prevents it from being “pushed” down with longer content:

fixedFooter
The trick to make this work is to use the same calculation from the original article to get the available space of the content, but instead of setting the height of the content DIV, we set the CSS min-height attribute. Continue reading

Custom Page Transitions (Part 2)

In Part 1 we used the Animate.css library of CSS animations as transitions for jQuery Mobile (jQM) pages, popups, and dialogs.  In Part 2, we will write our own KeyFrame animation CSS in order to have a unique/one-of-a-kind transition.

You will remember from last time, that to use a CSS transition with jQM, we create a class name for the transition and point that class at a named CSS animation. We can use different animations for the page entering, leaving, and the 2 reverse directions. An animation in CSS is created by defining a set of transforms at various points during the transition duration called keyFrames. Each KeyFrame’s time is defined as a percentage of the animation duration, so the simplest animations can be defined with only 2 KeyFrames: 0% – start transform, and 100% – end transform.  The browser is responsible for figuring out how to animate the transform values between the KeyFrames. Continue reading

Custom Page Transitions (part 1)

The jQuery Mobile (jQM) framework includes a set of CSS-based transition effects that can be applied to any page link that uses Ajax navigation. jQM also provides CSS hooks so that developers can easily include custom CSS transitions.

In this post we will look at using animations found in the popular animate.css library as jQM page transitions, and in part 2, we will develop a custom 3d transition from scratch.

Continue reading