html:
请单击“提交”,测试提交按钮的单击事件也被触发了。
Javscript:
经过测试,IE,FF,Chrome,Opera,Safari都没有问题,均可正常提交表单。
但在实际的设计中,为了让提交按钮更好看,buildder经常把它们用a标签来处理,加个背景图片来模拟按钮,我们仍然用上面的思路来尝试,增加一个a标签,让它来提交表单,我们仅修改html。
Html:
请单击“提交”,测试提交按钮的单击事件也被触发了。
javascript:
运行后,问题出现了,IE、FF、Opera均OK,但Chrome和Safari不能正常运行,后来网上搜索了下,发现a标签并不是和按钮一样有onclick()事件的,解决办法是针对 IE 和 FF编写不同的逻辑,JS代码如下:
javascript:
至此,问题解决,虽然这个问题很简单,但很容易被大家忽略,贴出来和大家一起分享。
语法:
createEvent(eventType)
参数 | 描述 |
eventType | 想获取的 Event 对象的事件模块名。关于有效的事件类型列表,请参阅”说明”部分。 |
Return value
Returns a newly created Event object with the specified type.
Throws
If the implementation supports the required event type, this method will throw a DOMException exception with code NOT_SUPPORTED_ERR.
Description
This method will create a new event type, which is specified by the parameter eventType. Note that the value of this parameter is not the name of the event interface to be created, but the name of the DOM module that defines that interface.
The following table lists the legal values of eventType and the event interface created by each value:
|
Initialization method | |||||||||||||
HTMLEvents | HTMLEvent | iniEvent() | ||||||||||||
MouseEvents | MouseEvent | iniMouseEvent() | ||||||||||||
UIEvents | UIEvent | iniUIEvent() |
After creating the Event object using this method, the object must be initialized using the initialization method shown in the table above. For details on initialization methods, see the Event object reference. This method is actually not defined by the Document interface, but by the DocumentEvent interface. If an implementation supports the Event module, then the Document object implements the DocumentEvent interface and supports this method.

The future trends of Python and JavaScript include: 1. Python will consolidate its position in the fields of scientific computing and AI, 2. JavaScript will promote the development of web technology, 3. Cross-platform development will become a hot topic, and 4. Performance optimization will be the focus. Both will continue to expand application scenarios in their respective fields and make more breakthroughs in performance.

Both Python and JavaScript's choices in development environments are important. 1) Python's development environment includes PyCharm, JupyterNotebook and Anaconda, which are suitable for data science and rapid prototyping. 2) The development environment of JavaScript includes Node.js, VSCode and Webpack, which are suitable for front-end and back-end development. Choosing the right tools according to project needs can improve development efficiency and project success rate.

Yes, the engine core of JavaScript is written in C. 1) The C language provides efficient performance and underlying control, which is suitable for the development of JavaScript engine. 2) Taking the V8 engine as an example, its core is written in C, combining the efficiency and object-oriented characteristics of C. 3) The working principle of the JavaScript engine includes parsing, compiling and execution, and the C language plays a key role in these processes.

JavaScript is at the heart of modern websites because it enhances the interactivity and dynamicity of web pages. 1) It allows to change content without refreshing the page, 2) manipulate web pages through DOMAPI, 3) support complex interactive effects such as animation and drag-and-drop, 4) optimize performance and best practices to improve user experience.

C and JavaScript achieve interoperability through WebAssembly. 1) C code is compiled into WebAssembly module and introduced into JavaScript environment to enhance computing power. 2) In game development, C handles physics engines and graphics rendering, and JavaScript is responsible for game logic and user interface.

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.

C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.


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