


There are more and more browsers nowadays, which makes the compatibility requirements of web design higher and higher. Commonly used ones such as setting it as the homepage and adding favorite codes are simple but the compatibility is very poor. Almost every website has a code for adding it to favorites and setting it as homepage. It doesn’t matter whether it has any effect or not. The demand should be there.
However, due to browser compatibility issues, many codes used before have lost their effect. Here is a piece of code that is compatible with various browsers. It cannot be regarded as compatible. It can only be said that it will work in unsupported browsers. Can give prompts, the code is as follows:
<!doctype html> <html> <head> <title>加入收藏和设为首页</title> <script type="text/javascript"> //加入收藏 function AddFavorite(sURL, sTitle){ sURL = encodeURI(sURL); try{ window.external.addFavorite(sURL, sTitle); } catch(e){ try{ window.sidebar.addPanel(sTitle, sURL, ""); } catch(e){ alert("加入收藏失败,请使用Ctrl+D进行添加,或手动在浏览器里进行设置."); } } } //设为首页 function SetHome(url){ if (document.all){ document.body.style.behavior='url(#default#homepage)'; document.body.setHomePage(url); } else{ alert("您好,您的浏览器不支持自动设置页面为首页功能,请您手动在浏览器里设置该页面为首页!"); } } </script> </head> <body> <a href="javascript:void(0)">设为首页</a> <a href="javascript:void(0)">加入收藏</a> </body> </html>
The above code is short and easy to understand. It is compatible with various browsers and can be added to favorites and set as homepage. If you have any questions, please feel free to ask. The editor will contact you in time. Thank you!
Let me share with you a piece of jquery code to implement the add to favorites function
//设为首页 function SetHomePage() { if (document.all) { document.body.style.behavior = 'url(#default#homepage)'; document.body.setHomePage('http://www.87cool.com'); } else if (window.sidebar) { if (window.netscape) { try { netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect"); } catch (e) { alert("该操作被浏览器拒绝,如果想启用该功能,请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true"); } } var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch); prefs.setCharPref('browser.startup.homepage', 'http://www.87cool.com'); } } //加入收藏夹 function AddFavorite() { var title = document.title; var url = location.href; if (window.sidebar) { window.sidebar.addPanel(title, url, ""); } else if (document.all) { window.external.AddFavorite(url, title); } else { return true; } }

JavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.

The main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

JavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.


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