backwards compatible

Unknowingly Android Oreo has been released for a few months, and your app is starting to use the latest platform? Do you encounter some tricky issues during the app migration? How is your Android app compatible with Oreo?We should all know that every major upgrade, in the compatibility of this piece will always appear more or less problems, today come together to explore the compatibility of the application.Do not know if you remember, from the Andrio

CSS descendant selectors are very useful and make our work more convenient. But there's a problem, IE8 and IE8. The following are not compatible with many descendant selectors.These six descendant selectors are relatively long-used:You will find that IE9 is compatible with these descendant selectors. IE8, IE7 except for: First-child is compatible, the other five

Picture slider actually also with the picture carousel, need not so many strange code to be able to realize, but the layout is a bit complex, and this thing in bootstrap inside also not, in the webpage, this component also more and more rare, after all, this small component too wasted network resources, the logic of the realization is more complex, If you do not want to be specifically asked, can not do the best bad.Sometimes, if a simple web page like "CSS" black humor,

JavaScript compatible with IE and Firefox Firefox's carriage return event Copy Code code as follows: Copy Code code as follows: jquery compatible with IE and Firefox Firefox's carriage return event Copy Code code as follows: $ (document). Ready (function () { $ ("Press Enter Control"). KeyDown (function (e) { var curkey = E.which; if (Cu

To a number of different resolution browser is a depressing thing, is all the people who write CSS will encounter. Although conditional annotations are an ideal approach, forward backwards compatibility. Unfortunately I don't like n versions of CSS, First of all, my own usage. Initialization selectors{} Guaranteed backwards compatibility, Then start filtering Whether or not IE6 introduced quirks Mode are u

The flash Embedded in a webpage is the top layer of all webpages by default. It does not work even if the value of z-index is small. So when a div layer and a flash object have an intersection on display, how can this div layer be displayed on top of flash? The following are the solutions I have seen on the Internet. In fact, you only need to set the flash Object. You do not need to set the z-index attribute value. You only need to set a flash attribute: wmode. For more information about how

Article Title: new ideas for the development of "Linux compatible kernel project. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Linux has already performed well in the field of servers, embedded systems, and high-performance computing, but it still maintains a low share in the desktop field, especially in the dom

It is very easy to use javascript to determine whether the user clicks the Left or Right button. You only need to add the onmousedown event to the object and use the javascript e. button value to determine whether the user clicks the event. The following is an example. Document. onmousedown = judgeMouseButton; function judgeMouseButton (e) {var e = window. event | e; // obtain the event object var value = e. button; if (value = 2 | value = 3) {alert ('right-click the click ');} else {alert ('cl

Recently I made a project and encountered the problem of incompatibility between FireFox and IE scripts. For this reason, I collected some compatible scripts from the Internet, and I also found out a little bit, I wrote it in another blog of my own and copied it for your reference. Recently I made a project and encountered the problem of incompatibility between FireFox and IE scripts, for this reason, I collected some

For friends who often use JavaScript, sometimes a script is not compatible with both browsers. Below are some codes compatible with ie and firefox. 1. Windows. event compatible scripts 2. Shield Form submission events 3. Obtain the event Source 4. Add event compatibility 5. How to register innerText in Firefox 6. Length 7. Child controls under the parent Control

Introduced:This is a special tag for IE8, used to specify IE8 browser to simulate the rendering of a particular version of IE (such as people annoying IE6), to solve some of the compatibility problems, such as the specific way to simulate IE7 as follows: = "x-ua-compatible" = "Ie=emulateie7"/>But what makes me curious is that there is a value like chrome behind this tag, ie can also simulate chrome?A quick search, only to understand that the original

The Comparison Between POSIX and Perl-Compatible Regular Expressions (preg_match, preg_replace, ereg, and ereg_replace). For more information, see. The Comparison Between POSIX and Perl-Compatible Regular Expressions (preg_match, preg_replace, ereg, and ereg_replace). For more information, see. First, let's take a look at the two main functions of POSIX-style Regular Expressions: Ereg function: (Regul

My database (asm storage) is upgraded from 11.1 to 11.2. This function must be upgraded to 11.2 only when the delay section is created today. Check if my instance's compatible is My database (asm storage) is upgraded from 11.1 to 11.2. This function must be upgraded to 11.2 only when the delay section is created today. Check if my instance's compatible is My database (asm storage) is upgraded from 11.1

Evolve is a new simple GNOME3 topic that is compatible with the latest GTK3.2 and uses the Adwaita engine. Install sudoadd-apt-repositoryppa in Ubuntu11.10OneiricOcelot: webupd8team/themessudoapt-getupdatesudoapt-getinstallevolve-gtk- EvolveIs a new simple GNOME 3 topic, compatible with the latest GTK 3.2, using the Adwaita engine. Installation Method under Ubuntu 11.10 Oneiric Ocelot sudo add-apt-reposito

1. How to Learn Div First, master the CSS and HTML syntax. In CSS, in addition to general syntax, especially float, clear, overflow, line-height, etc., HTML tags focus on Div, UL, Li, DL, DD, and so on.Second, in fact, the best tutorial for div is to study the practices of the QQ .com 163.com sohu.com ifeng.com portals. If you cannot understand such a large website, refer to www.ccopen.net developed with students in my lecture.And www.chinajwork.org. 2. How to Make Div

Databases are almost an essential element in project development. I believe SQL Server is very familiar to everyone. Have you ever encountered such a problem: Database incompatibility issues occur when you analyze or deploy a database. I got a database of version 08 or version 12. As a result, the deployed server only has an SQL Server of version 05 or version 08. is a small compatibility problem a headache. A common solution is to export database scripts and back up databases. Then, create a da

Databases are almost an essential element in project development. I believe everyone is familiar with sqlServer. Have you ever encountered such a problem: when analyzing or deploying databases, the database is incompatible. Modify database compatibility version syntax ALTERDATABASEdatabase_nameSETCOMPATIBILITY_LEV Databases are almost an essential element in project development. I believe everyone is familiar with SQL Server. Have you ever encountered such a problem: when analyzing or deploying

Currentstyle and getComputedStyle are compatible. getcomputedstyleCurrentStyle: Get the calculated style, also called the current style and final style.Advantage: You can get the final style of the element, including the default value of the browser. Unlike style, you can only get the line style, so it is more commonly used.Note: you cannot obtain attribute values of compound styles, such as background. You can only obtain a single style, such as back

Use regular expressions compatible with Perl in PHP Preface PHP is widely used in Web background CGI development. it usually produces some results after user data. However, if the user input data is incorrect, a problem may occur, for example, a person's birthday is "August February 30 "! How can we check whether the summer vacation is correct? We have added support for regular expressions in PHP, so that we can easily perform data matching. What is

How does Javascript get and set the height and width of the div and be compatible with any browser? Check the Code:Copy codeThe Code is as follows: Obtain the div1 width and height:Copy codeThe Code is as follows:Alert (document. getElementById ("div1"). offsetHeight); // compatible with FF, IE, etc.Alert (document. getElementById ("div1"). offsetWidth); // compatible