Mobile Responsive Design

Web Development

When designing a mobile version of the site, the core question is still what resolution to choose and which are the most popular ones. Answering this question will help you to build the so-called «mobile responsive design».

By reference to statistics we will consider five the most popular mobile screen resolutions.

Mobile Responsive Design: Most Popular Resolutions

And five the most popular tablet resolutions.

Mobile Responsive Design: Most Popular Tablet Resolutions

How to Create Mobile Responsive Design?

The media queries are entering the game. For instance, if we add the following code to the stylesheet, it will define the site background, provided that a certain device will have 480 or less pixels screen.

@media screen and (max-device-width: 480px) and (orientation: portrait) {
  #background  {
    width: 480px;

We can also use CSS-rule @import for the conditional loading of stylesheets into the current stylesheet. For example, the following code imports the phone.css, provided that a certain device will have the screen and the display area of maximum width 480 pixels.

@import url("phone.css") screen and (max-width:480px); When creating responsive web-designs the most commonly used media queries are about display area width and device screen width (device-width).

  • width — the display area width.
  • height — the display area height.
  • device-width — width of the surface on which rendering occurs (it’s the device screen width for us).
  • device-height — height of the surface on which rendering occurs (it’s the device screen height).
  • orientation — orientation of the device screen (portrait or landscape).
  • aspect-ratio — ratio of the width and height depending on the display area width and height. A widescreen display with sides’ ratio 16:9 can be marked as aspect-ratio: 169.
  • device-aspect-ratio — similar to the aspect-ratio, but it’s based on the width and height of the device surface, on which rendering occurs, and not on the width and height of the display area.

All the features mentioned above can be provided with the prefix min or max to define the range. Look at the following piece of code:

@import url("phone.css") screen and (min-width:560px) and (max-width:1136px); Minimum (min) and maximum (max) were defined in the media queries to define resolution. File phone.css will be imported only when it’s referred to devices with the minimum display area width of 560 pixels and maximum display area width of 1136 pixels.

And finally the most convenient media queries for Apple products.

iPhone < 5:

@media screen and (device-aspect-ratio: 2/3) { your styles } iPhone 5:

@media screen and (device-aspect-ratio: 40/71) { your styles } iPad:

@media screen and (device-aspect-ratio: 3/4) { your styles }



Ropes — Fast Strings

Most of us work with strings one way or another. There’s no way to avoid them — when writing code, you’re doomed to concatinate strings every day, split them into parts and access certain characters by index. We are used to the fact that strings are fixed-length arrays of characters, which leads to certain limitations when working with them. For instance, we cannot quickly concatenate two strings. To do this, we will at first need to allocate the required amount of memory, and then copy there the data from the concatenated strings.