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Making images responsive

From: WordPress: Building Responsive Themes

Video: Making images responsive

Once you've made the main content responsive, you have to make sure that the images also respond to the size of the screen or window; otherwise, you get a weird effect where the image starts spilling out over the edges. You can see it here, when I start resizing this window, that the image literally spills out over the edge, and if I go down further, you'll see that we start cropping the image with the edge of the window. That is not an ideal situation, and we need to fix it. But there's an added challenge. In WordPress, the author can insert images in many different ways.

Making images responsive

Once you've made the main content responsive, you have to make sure that the images also respond to the size of the screen or window; otherwise, you get a weird effect where the image starts spilling out over the edges. You can see it here, when I start resizing this window, that the image literally spills out over the edge, and if I go down further, you'll see that we start cropping the image with the edge of the window. That is not an ideal situation, and we need to fix it. But there's an added challenge. In WordPress, the author can insert images in many different ways.

From the top here, you see the first image is inserted with a style called None, which means it just flows with the rest of the content. Below that, we have an image aligned to the left, we have one aligned to the center, and we have aligned to the right, and finally, we have an image that has a caption on it, and we need to account for all of these when we create image styles. Fortunately, there's a relatively easy way of making images responsive. What you have to do is tell the browser to set the width of the image to 100% of the containing box.

So in this case the containing box for the image is the container that contains all the content here. We can see it here; it would be the entry-content. So the ideal situation would be that as the window is resized, the image is scaled to fit within that container. To do that, we are going to use a style code called max-width. So I'll go into my style sheet, and I'll find the Image section, and first, I am simply going to apply a style that applies all images. So I'll just say image and I'll set max-width to 100%.

That means the image, at the biggest, will be 100% of the containing container. And then I'll also set height to auto. By setting height to auto, I am telling the browser to automatically resize the height of the image to match in proportion to the width, so that the image doesn't get stretched and start looking weird. When I save this and reload my browser, you'll see, at full resolution it makes no difference, but as we scale the window down, you'll notice that the images now scale along with the rest of the content.

That is, with one exception. If we scroll down to the bottom, you'll see that my caption image still stays the same size, and we're still covering it. And that's what I was talking about. In WordPress we have to account for many different scenarios. So what we need to do here is add in some specific styles that capture all of these different scenarios. If you go to the code snippets file for this course, you'll find that entire stack of code here, at the very top, under 07.02. If you copy that out and paste it in and place it with this simple image call and save it, you'll see that now everything sizes, including the captioned image.

If we go back and look at the code, you see it's still the same code, max-width: 100%, height: auto, and it even has an explanation here of what's going on. And what we're doing is simply applying the style to specific types of images. Size-auto, size-full, size-large, size-medium, these are all the standard sizes in WordPress. We also assign it to the attachment images, which is a different page that you can look at images. We assign it to images in sidebars and we assign it to images with captions.

Before we finish up completely with images, I also want to account for certain specific scenarios where images are handled differently inside WordPress. So I've created another set of style code here that I can copy out from the code_snippets file and paste in, and this applies specifically to images that are aligned to the center and also to captioned images that are aligned to the center. What this style does is it sets the margin to auto on left and right so that the image truly aligns in the center, and also sets a bottom margin to create some extra space.

Again, we're setting the max width to 100% and height to auto, so this is just a custom style specifically for these two scenarios. Save that, open it in the browser, and you now have a set of fully responsive images in your site. When building WordPress themes, it's important to cover all eventualities. By targeting each image insertion scenario, you end up with responsive images no matter where and how they are inserted.

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This video is part of

Image for WordPress: Building Responsive Themes
WordPress: Building Responsive Themes

39 video lessons · 16995 viewers

Morten Rand-Hendriksen
Author

 
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  1. 4m 5s
    1. Welcome
      1m 4s
    2. Using the exercise files
      1m 27s
    3. What you should know before watching this course
      1m 34s
  2. 8m 36s
    1. What is responsive design?
      4m 16s
    2. The different faces of WordPress on mobile
      1m 55s
    3. Exploring the finished Anaximander theme
      2m 25s
  3. 9m 38s
    1. Getting and installing the Anaximander theme
      1m 53s
    2. Configuring basic theme options
      7m 45s
  4. 23m 51s
    1. Deciding what screen sizes to design for
      4m 11s
    2. Thinking responsively: Designing for many different screen sizes
      6m 23s
    3. Visualizing content realignment for better markup
      4m 35s
    4. Designing menus
      4m 52s
    5. Adding responsive images and videos
      3m 50s
  5. 26m 8s
    1. What are media queries and how do they work?
      4m 18s
    2. Exploring CSS3, progressive enhancement, and graceful degradation
      3m 27s
    3. Understanding best practices for media queries
      3m 57s
    4. Creating a responsive frame
      5m 12s
    5. Customizing media queries with the Chrome Developer Tools
      5m 28s
    6. Taking device width into account
      3m 46s
  6. 11m 1s
    1. Resizing the site title and the description
      8m 22s
    2. Adding media queries to the header
      2m 39s
  7. 11m 22s
    1. Making the menu responsive
      3m 35s
    2. Creating a different menu design for small screens
      7m 47s
  8. 19m 22s
    1. Making a responsive single-post layout
      6m 11s
    2. Making images responsive
      4m 37s
    3. Making videos responsive by including FitVids
      8m 34s
  9. 7m 45s
    1. Making the sidebar responsive
      5m 10s
    2. Hiding sidebars on mobile
      2m 35s
  10. 7m 28s
    1. Dealing with footer widgets
      5m 11s
    2. Adding navigation links that return to the top of the page
      2m 17s
  11. 12m 54s
    1. Using FlexSlider to create a responsive slider
      6m 2s
    2. Creating a loop to show sticky posts in a featured slider
      6m 52s
  12. 24m 37s
    1. What is jQuery Masonry?
      3m 41s
    2. Installing jQuery Masonry
      4m 45s
    3. Configuring the index page with Masonry
      7m 0s
    4. Using CSS to finalize the Masonry layout
      6m 17s
    5. Adding media queries to the Masonry index
      2m 54s
  13. 9m 11s
    1. Exploring hidden features of the Anaximander theme
      5m 51s
    2. Where to go from here
      3m 20s

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