responsive-design

问题 Is there a way to make the following: #id { border-radius: 100px; width: 100px; height: 100px; } <div id="circle"> <h3>Hello</h3> </div> A round div with the text centered vertically and horizontally . At the same time keeping the circle responsive. By that I mean having a width of say 50% of the containing div , at the same time keeping the height percentage equal as to make a circle. And changing the static 100px to pertentages makes the circle oval. 回答1: Viewport Units If you use the same

问题 I'm using the technique described here to make an iframe (video) responsive. Essentially the iframe is absolutely positioned within a wrapper element with a 100% width. The wrapper element has it's padding set based on the aspect ratio of the video: .embed-responsive { position: relative; /* video height / video width */ padding-bottom: 56.2%; height: 0; overflow: hidden; } .embed-responsive iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; } I need to be able to center

问题 I'm just now diving into responsive CSS and design, and I'm wondering how I'm supposed to figure out various device widths out. I don't want to spend all day testing every single mobile device possible, I just want to get the responsive layout enough to where it works. I saw some sites using @media only screen and (max-device-width: xx) but it seems that limits it to very specific resolutions, not actual browser window sizes. Any advice at all would be great. I'm not new to web development or

问题 I am wondering if there is a simple way to vertically center a responsive image. Please refer to the following jsFiddle: http://jsfiddle.net/persianturtle/yawTb/1/ Basic HTML: <img class="mobile-title-size" src="http://zx85.dyndns.org/raphtest/img/title.png" alt="Logo"> Basic CSS: .mobile-title-size { position: absolute; top: 2.5%; left: 6%; width: 70%; max-width: 300px; } This is the mobile header that uses the same image that is displayed on tablet and desktop viewports. Since the image is

问题 I want to make a responsive layout with twitter's bootstrap v2, with a column and a map. The idea is to build a UI like that from maps.google.com, but using a responsive design with bootstrap2. I want to have a style for desktop with navbar on top 1 left column (as sidebar) height: 100% minus navbarHeight, with a scrollbar width: .span3 content that fills the rest of the screen Then for the responsive mobile design I want the parts that have the full height to have a height depending on the

问题 I want to make a responsive layout with twitter's bootstrap v2, with a column and a map. The idea is to build a UI like that from maps.google.com, but using a responsive design with bootstrap2. I want to have a style for desktop with navbar on top 1 left column (as sidebar) height: 100% minus navbarHeight, with a scrollbar width: .span3 content that fills the rest of the screen Then for the responsive mobile design I want the parts that have the full height to have a height depending on the

问题 I have a selection of squares (squares turned 45° to look like diamonds) which I want to use to make up a big diamond shape with a central red diamond. I am having issues organising the diamonds themselves and the href seems to fail. How do I position the responsive diamonds in a regular grid ? Her is my code: body { background: black; color: #000000; font: 13px georgia, serif; line-height: 1.4; font-weight: lighter; text-rendering: optimizelegibility; } #diamond { width: 0; height: 0; border

问题 I have a selection of squares (squares turned 45° to look like diamonds) which I want to use to make up a big diamond shape with a central red diamond. I am having issues organising the diamonds themselves and the href seems to fail. How do I position the responsive diamonds in a regular grid ? Her is my code: body { background: black; color: #000000; font: 13px georgia, serif; line-height: 1.4; font-weight: lighter; text-rendering: optimizelegibility; } #diamond { width: 0; height: 0; border

问题 I'm working on a page that has the following markup: <img alt="" src="/banner_home.300x200.jpg" srcset="/banner_home.300x200.jpg 320w, /banner_home.600x400.jpg 480w, /banner_home.728x242.jpg 768w, /banner_home.920x306.jpg 960w, /banner_home.1234x400.jpg 1280w"> and it seems that in the latest Chrome & Opera, they ignore whatever the screen size is and just output whichever file is listed last (so the 1234x400.jpg in my case). Using Picturefill, Firefox and Safari both show the correct image

问题 I am practicing responsive web design. From what I've learned so far, it revolves around a fluid grid with fluid components, and CSS media queries. The website looks just like how I want it to look like on a mobile phone when I shrink my browser: However, when on my mobile phone, after being put on my web server, it looks completely different: I think there is some conflict between width and device-width that is occurring. Does anyone know what is going wrong? This is how i load my