移动端-笔记_html/css_WEB-ITnose-HTML Tutorial-php.cn

Home

Web Front-end

HTML Tutorial

移动端-笔记_html/css_WEB-ITnose

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jun 24, 2016 am 11:18 AM

meta基础知识

H5页面窗口自动调整到设备宽度，并禁止用户缩放页面

1 <meta name="viewport" content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no" />

viewport模板——通用

<!DOCTYPE html><html><head><meta charset="utf-8"><meta content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=no" name="viewport"><meta content="yes" name="apple-mobile-web-app-capable"><meta content="black" name="apple-mobile-web-app-status-bar-style"><meta content="telephone=no" name="format-detection"><meta content="email=no" name="format-detection"><title>标题</title><link rel="stylesheet" href="index.css"></head>

移动端touch事件
当用户手指放在移动设备在屏幕上滑动会触发的touch事件

touchstart——当手指触碰屏幕时候发生。
touchmove——当手指在屏幕上滑动时连续触发。通常我们再滑屏页面，会调用event的preventDefault()可以阻止默认情况的发生：阻止页面滚动
touchend——当手指离开屏幕时触发
touchcancel——系统停止跟踪触摸时候会触发。例如在触摸过程中突然页面alert()一个提示框，此时会触发该事件，这个事件比较少用

TouchEvent
touches：屏幕上所有手指的信息
targetTouches：手指在目标区域的手指信息
changedTouches：最近一次触发该事件的手指信息
touchend时，touches与targetTouches信息会被删除，changedTouches保存的最后一次的信息，最好用于计算手指信息

webkit表单元素的默认外观怎么重置
.css{-webkit-appearance:none;}

webkit表单输入框placeholder的颜色值能改变么
input::-webkit-input-placeholder{color:#AAAAAA;}
input:focus::-webkit-input-placeholder{color:#EEEEEE;}
webkit表单输入框placeholder的文字能换行么
ios可以，android不行~

::-ms-expand 适用于表单选择控件下拉箭头的修改，有多个属性值，设置它隐藏 (display:none) 并使用背景图片来修饰可得到我们想要的效果。

select::-ms-expand {
display: none;
}

audio元素和video元素在ios和andriod中无法自动播放
应对方案：触屏即播

$('html').on('touchstart',function(){
audio.play()
})

播放视频不全屏

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Difficulty in updating caching of official account web pages: How to avoid the old cache affecting the user experience after version update?Mar 04, 2025 pm 12:32 PM

The official account web page update cache, this thing is simple and simple, and it is complicated enough to drink a pot of it. You worked hard to update the official account article, but the user still opened the old version. Who can bear the taste? In this article, let’s take a look at the twists and turns behind this and how to solve this problem gracefully. After reading it, you can easily deal with various caching problems, allowing your users to always experience the freshest content. Let’s talk about the basics first. To put it bluntly, in order to improve access speed, the browser or server stores some static resources (such as pictures, CSS, JS) or page content. Next time you access it, you can directly retrieve it from the cache without having to download it again, and it is naturally fast. But this thing is also a double-edged sword. The new version is online,

How to efficiently add stroke effects to PNG images on web pages?Mar 04, 2025 pm 02:39 PM

This article demonstrates efficient PNG border addition to webpages using CSS. It argues that CSS offers superior performance compared to JavaScript or libraries, detailing how to adjust border width, style, and color for subtle or prominent effect

How do I use HTML5 form validation attributes to validate user input?Mar 17, 2025 pm 12:27 PM

The article discusses using HTML5 form validation attributes like required, pattern, min, max, and length limits to validate user input directly in the browser.

What is the purpose of the <datalist> element?Mar 21, 2025 pm 12:33 PM

The article discusses the HTML <datalist> element, which enhances forms by providing autocomplete suggestions, improving user experience and reducing errors.Character count: 159

What are the best practices for cross-browser compatibility in HTML5?Mar 17, 2025 pm 12:20 PM

Article discusses best practices for ensuring HTML5 cross-browser compatibility, focusing on feature detection, progressive enhancement, and testing methods.

What is the purpose of the <progress> element?Mar 21, 2025 pm 12:34 PM

The article discusses the HTML <progress> element, its purpose, styling, and differences from the <meter> element. The main focus is on using <progress> for task completion and <meter> for stati

What is the purpose of the <meter> element?Mar 21, 2025 pm 12:35 PM

The article discusses the HTML <meter> element, used for displaying scalar or fractional values within a range, and its common applications in web development. It differentiates <meter> from <progress> and ex

What is the purpose of the <iframe> tag? What are the security considerations when using it?Mar 20, 2025 pm 06:05 PM

The article discusses the <iframe> tag's purpose in embedding external content into webpages, its common uses, security risks, and alternatives like object tags and APIs.

See all articles