viewport | 易学教程

Why is my website cutting off on mobile devices?

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问题 I created this website with the original intention of having it be mobile. However I've had to take that function out and for the time being just wanted to have it so when you visit the site on a mobile device you just see the website as you would see on the screen. Not mobile friendly as you would want it to be but zoomed out so you can see the whole thing. I've already placed in the code to make it behave the way I'd like it to but something is happening and it's not working. Ive looked

Bootstrap

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网格系统的实现原理，是通过定义容器大小，平分12份。调整内外边距，通过媒体查询，就制作出强大的响应式网格系统那媒体查询时什么呢：媒体查询主要是对各种移动端设备的一个响应式兼容， <meta name = "viewport" content="width = device-width,initial-scale = 1.0,maximum-scale = 1.0,user-scalble = no"> width：宽度（数值 / device-width）（范围从200 到10,000，默认为980 像素） height：高度（数值 / device-height）（范围从223 到10,000） initial-scale：初始的缩放比例（范围从>0 到10） minimum-scale：允许用户缩放到的最小比例 maximum-scale：允许用户缩放到的最大比例 user-scalable：用户是否可以手动缩 (no,yes) WebApp全屏模式：伪装app，离线应用在Bootstrap中响应式布局就是利用其栅格系统，对于不容的屏幕采用不同的类属性。在开发中可以只写一套代码在手机平板，pc端都能使用，而不用考虑使用媒体查询（针对不同的设备分别写不同的代码）。 Bootstrap提供了一套响应式，移动设备优先的栅格系统，随着屏幕或视口（viewport）尺寸的增加

Responsive site is zoomed in when flipping between Portrait and Landscape on iPad/iPhone

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I've built a responsive site using Twitter Bootstrap here: http://zarin.me/cce/ The responsive design works great on iPad and iPhone, however when I flip the device from portrait to landscape, the site is zoomed in instead of adapting to the screen (pinching the screen works). What am I missing? Is this a viewport issue? Here's the only viewport code I have in my : <meta content="width=device-width, initial-scale=1.0" name="viewport"> Thanks in advance! You also want to add the maximum scale <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"> UPDATED I agree

Layout using vh does not scale with zoom

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问题 I've tried to create a login form using ONLY vh sizes. Doing this, in the hopes that the form, in all, would scale accordingly to the viewport. It doesn't! For some reason zooming in, creates a blank space that keeps getting bigger the more you zoom, between the input fields and the text below. http://jsfiddle.net/TnY3L/ The fiddle isn't very well made, just copied it from my project. But you can see what's wrong - and that's what counts. Anyone have any idea as to how I were to go about

Mobile overflow:scroll and overflow-scrolling: touch // prevent viewport “bounce”

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On a mobile (safari, webviews, wherever), overflow:scroll and overflow-scrolling: touch give a pretty smooth scroll, wich is cool. But, it makes the page "bounce" (area circled below), which is not the case when you are not using it, but which makes the experience a little less "native" (and more simply, as far as I can have an opinion about it, is absolutely unuseful) Is there a way to prevent it to happen ? Thanks a lot for your help/hints/replies I've managed to find a CSS workaround to preventing bouncing of the viewport. The key was to wrap the content in 3 divs with -webkit-touch

Redis消息队列实现秒杀

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本文转自: https://blog.csdn.net/weixin_39278982/article/details/81216416 消息队列的应用场景例如：秒杀、抢单功能。下面写个Demo简单实现一下秒杀，也就是抢购。首先创建一个lpush.html文件，代码如下： <!DOCTYPE html> <html> <head> <title>TODO supply a title</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <script src="jquery-3.2.1.min.js" ></script> <script> function push(uid){ $('#msg'+uid).html('请耐心等待.......'); $.get('lpush.php',{"uid":uid},function (data){ if(data == 1 ){ $('#msg'+uid).html('抢购成功!!'); }else{ $('#msg'+uid).html('抢购失败!!'); } }); } </script> </head> <body> <span id="msg5"></span><br>

What does the shrink-to-fit viewport meta attribute do?

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I'm having trouble finding documentation for this. Is it Safari specific? There was a recent bug in iOS 9 ( here ), the solution to which is adding shrink-to-fit=no to the viewport meta. What does this code do? It is Safari specific, at least at time of writing, being introduced in Safari 9.0. From the "What's new in Safari?" documentation for Safari 9.0 : Viewport Changes Viewport meta tags using "width=device-width" cause the page to scale down to fit content that overflows the viewport bounds. You can override this behavior by adding "shrink-to-fit=no" to your meta tag as shown below. The

Using jquery to get element's position relative to viewport

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What's the proper way to get the position of an element on the page relative to the viewport (rather than the document). jQuery.offset function seemed promising: Get the current coordinates of the first element, or set the coordinates of every element, in the set of matched elements, relative to the document. But that's relative to the document. Is there an equivalent method that returns offsets relative to the viewport? Agent_9191 Look into the Dimensions plugin, specifically scrollTop() / scrollLeft() . Information can be found at http://api.jquery.com/scrollTop . Igor G. The easiest way to

How to show div when user reach bottom of the page?

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When user scrolls to the bottom of the page I want to show some div, with jQuery of course. And if user scrolls back to he top, div fade out. So how to calculate viewport (or whatever is the right name) :) Thanks This must get you started: <!doctype html> <html lang="en"> <head> <title>SO question 2768264</title> <script src="http://code.jquery.com/jquery-latest.min.js"></script> <script> $(document).ready(function() { $(window).scroll(function() { if ($('body').height() <= ($(window).height() + $(window).scrollTop())) { alert('Bottom reached!'); } }); }); </script> <style> body { margin: 0; }

我对BFC的理解

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　　最初这篇文章打算回答寒冬大神的第一问，谈谈CSS布局。本来呢我以为布局主要涉及float跟display相关属性，以及他们的包含框、静态位置等等。后来看了大神的一片面试文章，嗯？这里怎么还有个BFC，这是神马东东。待我搜索一下，萨萨萨，不看不知道，越看越糊涂，这到底是个神马东东。。。经过一个周时间的查阅资料和自我思考，在此总结一下我对BFC的认识，愿与各位道友分享，欢迎拍砖！　　对CSS有了解的道友们肯定都知道盒式模型这个概念，对一个元素设置CSS，首先需要知道这个元素是block还是inline类型。而BFC就是用来格式化块级盒子，同样管理inline类型的盒子还有IFC，以及其他的FC 。那首先我们就来看一下FC的概念。　 Formatting Context：指页面中的一个渲染区域，并且拥有一套渲染规则，他决定了其子元素如何定位，以及与其他元素的相互关系和作用。　 BFC：块级格式化上下文，它是指一个独立的块级渲染区域，只有Block-level BOX参与，该区域拥有一套渲染规则来约束块级盒子的布局，且与区域外部无关。　　 BFC的生成　　既然上文提到BFC是一块渲染区域，那这块渲染区域到底在哪，它又是有多大，这些由生成BFC的元素决定，CSS2.1中规定满足下列CSS声明之一的元素便会生成BFC。根元素 float的值不为none

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