How to set css for ie8-Front-end Q&A-php.cn

How to set css for ie8

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Release： 2023-04-23 17:15:26

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With the development of the Internet, front-end technologies such as HTML, CSS, and JavaScript have become one of the core technologies for modern website development. However, in the early days of the Internet, web browser compatibility issues were a major problem for front-end developers. Among them, the most typical one is the compatibility issue of IE browser. The compatibility problem of IE browser is particularly serious, and IE8, as an older browser, also needs special attention in terms of compatibility. This article will mainly introduce how to set CSS to obtain the best compatibility on IE8 browser.

1. Understand the CSS compatibility issues of IE8

The compatibility issues of IE8 browser are mainly reflected in CSS styles. CSS is a cascading style sheet language that provides style, layout, and design for web pages. However, on IE8, the CSS simply doesn't display the correct styles like it does on other modern browsers. This problem is mainly because the IE8 browser does not support the latest CSS3 specification, and its support for CSS2 is also incomplete. Therefore, when writing CSS style sheets, you need to pay special attention to the following details:

Do not use CSS3 properties, such as rounded borders, etc.;
Avoid using position: fixed, because in IE8 Compatibility issues will occur on browsers;
Avoid using transitions and animations;
Avoid using RGBA colors.

2. Set the document mode of IE8 browser

By setting the document mode of IE8 browser, the CSS compatibility of IE8 browser can be improved. IE8 browser supports 4 document modes, namely standard mode, mixed mode, IE7 compatibility mode and IE5 compatibility mode. By default, IE8 will use the standard document mode, but if the document type declaration in the HTML document is not standard, the browser will automatically switch to IE7 compatibility mode. In order to ensure the compatibility of IE8, we need to keep the browser in standards mode.

To set the standard mode of the IE8 browser, you need to add the following code to the HTML document:

<!DOCTYPE html>
<!--[if lt IE 9]>
  <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->

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The above is a standard HTML5 document type declaration and a conditional comment. This conditional comment can simulate the IE8 browser into a standard IE8 browser, thereby solving CSS compatibility issues. In addition, introducing html5.js files or modernizr.js files into the document can also solve the problem of IE8 browser's support for HTML5 elements, which is very important for developing responsive websites.

3. Use CSS Hack

CSS Hack refers to a technology that uses different parsing methods of different browsers in CSS to achieve browser compatibility. The advantage of CSS Hack is that it is very simple and easy to use, but the disadvantage is that it is not standard practice, and it can be easily misused, which in some cases can cause performance issues and compatibility issues.

The following are some CSS Hacks applicable to IE8 browsers:

_IE8: Only effective for IE8 and versions below.

.class{ color:#000; /* 其他浏览器 */ _color:#f00; /* IE8 */ }

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*: Effective for IE7 and below.

.class{ color:#000; /* 其他浏览器 */ *color:#f00; /* IE7 */ }

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: Only effective for sibling elements in IE7 and below.

.class{ color:#000; /* 其他浏览器 */ +color:#f00; /* IE7 */ }

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4. Using CSS Framework

CSS Framework is a library that provides developers with CSS-style components and templates. Their main purpose is to simplify front-end development work, provide standard design templates, and improve browser compatibility.

Some common css frameworks include Bootstrap, Foundation, Bulma, Semantic UI, etc. They all provide a series of CSS styles that can help us solve browser compatibility issues. At the same time, they also have the characteristics of responsive design and can respond to mobile devices.

5. Use Modernizr

Modernizr is a JavaScript library that can detect the browser's CSS3 and HTML5 support. The IE8 browser has very limited support for CSS3 and HTML5, so using Modernizr can make our CSS code more adaptable.

Through Modernizr, we can detect whether specific CSS3 or HTML5 features are available, and if available, we can apply the corresponding CSS3 or HTML5 effects. If that doesn't work, you can use existing CSS and JavaScript code.

Finally, although the IE8 browser is an older browser, it still has its significance in some specific scenarios. In the actual development process, we should try our best to ensure the compatibility of the website on the IE8 browser. Through the introduction of this article, we can learn how to set CSS correctly to obtain the best compatibility on the IE8 browser.

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