lobiread.blogg.se

1. #Css background image resize browser window how to
2. #Css background image resize browser window full
3. #Css background image resize browser window code

Inside that, notice the heading and anchor tags.Keep the page open in your browser, and switch back to index.html in your code editor.The rest of the content has been styled already, so we’ll focus on the header.

#Css background image resize browser window full

Open index.html from the Full Screen Photo Background folder.Ĭurrently the header has a black background and is sized to the content, but we want it to fill the screen.Make sure you do not open the Done folder!

#Css background image resize browser window code

Open that folder in your code editor if it allows you to (like Sublime Text does). For this exercise we’ll be working with the Full Screen Photo Background folder. Notice how the background always fills the screen, and the type changes size based on the window size! Resize the browser window, making it smaller and larger.On the Desktop, go to Class Files > yourname-Mobile and Responsive Class and open the Full Screen Photo Background Done folder. Let’s see how the final page is supposed to look.You’ll size type relative to the screen size (so type gets larger on larger screens) as well as look at a method for perfectly positioning an element in the center of the page. In this exercise you’ll create a page header that fills the entire screen with an image and heading. Topics covered in this Mobile & Responsive Web Design tutorial:Ĭreating a full screen background, Using viewport sizing units vh & vw, Vertically aligning content, Darkening the background image via CSS Exercise Preview During the course, you will get access to the accompanying class files, live instructor demonstrations, and hands-on instruction.

You can see the styles that control the background image in style.Note: These materials are provided to give prospective students a sense of how we structure our class exercises and supplementary materials. This means that the same image background is being used for all screen sizes. Resize the browser window and notice that the Network Log isn't showing any new requests being made by the page. You'll see that the only image that's being requested is background-desktop.jpg, which has a size of 1006KB: Press `Control+Shift+J` (or `Command+Option+J` on Mac) to open DevTools.Ĭheck out Inspect Network Activity With Chrome DevTools if you need more help with DevTools.Open the unoptimized demo in a new Chrome tab.

Understand responsive background images #įirst, analyze the network traffic of the unoptimized demo: You'll just need to map the Chrome DevTools screenshots in this guide back to the relevant features in your browser of choice. You can use another browser's DevTools instead if you prefer. This guide assumes that you're familiar with Chrome DevTools.

#Css background image resize browser window how to

This guide shows you how to use media queries to send images that are only as large as they need to be, a technique commonly known as responsive images. Using media queries is a popular technique for delivering tailored stylesheets and assets to different screens to reduce the amount of data transferred to users and improve page load performance. Many sites request heavy resources, like images, that are not optimized for certain screens, and send large CSS files containing styles that some devices will never use.