


js simulates clicking and submitting a form as an example, compatible with mainstream browsers_javascript skills
In actual application development, we often use JS module events, but sometimes we encounter some problems, such as click events. For a simple example, click the "Submit" button outside the form to submit the form. Let’s code.
Html:
Please click "Submit" and the click event of the test submit button is also triggered.
Javscript:
After testing, there is no problem with IE, FF, Chrome, Opera, and Safari, and the form can be submitted normally.
But in actual design, in order to make the submit buttons look better, builders often use a tag to process them and add a background image to simulate the button. We still use the above idea to try and add an a tag to submit the form, we only modify the html.
Html:
Please click "Submit" and the click event of the test submit button is also triggered.
Javascript:
After running, the problem occurred. IE, FF, Opera are all OK, but Chrome and Safari cannot run normally. Later, I searched online and found a Labels do not have the same onclick() event as buttons. The solution is to write different logic for IE and FF. The JS code is as follows:
javascript:
At this point, the problem is solved. Although this problem is very simple, it is easily ignored by everyone. I posted it to share with everyone.
Syntax:
createEvent(eventType)
Parameter Description
eventType The event module name of the Event object you want to get. See the Description section for a list of valid event types.
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 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:
Parameter event interface 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 more information about initialization methods, see 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.

JavaScript originated in 1995 and was created by Brandon Ike, and realized the language into C. 1.C language provides high performance and system-level programming capabilities for JavaScript. 2. JavaScript's memory management and performance optimization rely on C language. 3. The cross-platform feature of C language helps JavaScript run efficiently on different operating systems.

JavaScript runs in browsers and Node.js environments and relies on the JavaScript engine to parse and execute code. 1) Generate abstract syntax tree (AST) in the parsing stage; 2) convert AST into bytecode or machine code in the compilation stage; 3) execute the compiled code in the execution stage.

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.


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