Verification and operation method for Web front-end codes

Abstract

The invention discloses a verification and operation method for Web front-end codes. The verification and operation method is characterized by comprising the following steps: S100, providing an input interface (hereinafter referred to as codes) of JavaScript codes; s200, obtaining a code input by a user; s300, judging whether the grammar of the input code is correct or not, if yes, executing the step S600, and if not, executing the step 400; s400, feeding back grammar errors of the input codes; s500, correcting the current running code, and executing the step S200; s600, judging whether the running code runs successfully or not, if yes, executing the step S800, and if not, executing the step S700; s700, running errors of the input codes are fed back, and the step S500 is executed; s800, outputting and displaying a running result of the running code; and S900, storing the running code for multiplexing and modifying the current running code.

Description

Technical Field

[0001] The present invention belongs to the technical field of Web front - end development, and relates to a method for validating and running Web front - end code. Background Art

[0002] With the continuous development of Web technology, Web front - end development has become increasingly complex, and developers need to write and debug a large amount of JavaScript code in the browser. However, the existing code validation and running methods have the following problems:

[0003] 1. Code validation is not timely: Developers usually need to manually trigger validation and cannot understand the syntax errors of the code in real time, resulting in low debugging efficiency.

[0004] 2. Error feedback is not clear: When an error occurs in the code, there is a lack of clear error message prompts, making it difficult for developers to quickly locate and solve problems.

[0005] 3. Code management is inconvenient: There is a lack of code storage and loading functions, and developers cannot conveniently reuse and modify existing code.

[0006] In view of the above problems, it is particularly important to develop a Web front - end code validation and running method that is easy to operate, has clear feedback, and is convenient for code management. Summary of the Invention

[0007] In view of the deficiencies of the prior art, the present invention provides a method for validating and running Web front - end code, including the following steps:

[0008] S100: Provide an input interface for JavaScript code: A textarea element is provided in the Web page to receive the JavaScript code input by the user;

[0009] S200: Obtain the JavaScript code input by the user;

[0010] S300: Use the eval function to validate the syntax of the input JavaScript code, and determine whether the syntax of the input JavaScript code is correct. If it is, execute step S600; otherwise, execute step 400;

[0011] S400: Feedback the syntax error of the input JavaScript code;

[0012] S500: Modify the currently running JavaScript code, and execute step S200;

[0013] S600: Wrap the eval function with a try-catch statement to run the input JavaScript code, and determine whether the executed JavaScript code runs successfully. If so, execute step S800; otherwise, execute step S700;

[0014] S700: Report the running error of the input JavaScript code, and execute step S500;

[0015] S800: Output and display the running result of the executed JavaScript code;

[0016] S900: Store the executed JavaScript code for reuse and modification of the currently executed JavaScript code.

[0017] Preferably, step S200 includes the following steps:

[0018] S201: Set a unique identifier for the textarea element:

[0019] S202: After obtaining the textarea element through the unique identifier, add an event listener to the textarea element to listen for input events;

[0020] S203: Listen for the input events of the textarea element to obtain the JavaScript code input by the user in real time;

[0021] S204: Store the obtained JavaScript code in a front-end variable for subsequent processing.

[0022] Preferably, step S300 includes the following steps:

[0023] Take the obtained JavaScript code string as a parameter and pass it into the eval function;

[0024] Use the eval function to execute and process the passed-in string as JavaScript code to verify the syntax of the input JavaScript code.

[0025] Preferably, step S600 includes the following steps:

[0026] Place the call to the eval function in a try code block, and immediately follow the try code block with a catch code block to capture and handle any exceptions or errors that may be thrown during the execution of the eval function.

[0027] Preferably, step S900 includes the following steps:

[0028] Set a region on the page to display the results or error messages of JavaScript code execution;

[0029] Save the current JavaScript code to local or server to store the current JavaScript code;

[0030] Load the saved JavaScript code from local or server to reuse and modify the currently running JavaScript code.

[0031] The beneficial effects of the present invention are:

[0032] 1. Real-time syntax checking: By listening to the input event of the Textarea element, the code entered by the user is obtained in real time, and the syntax is checked using the eval function provided by the browser environment, and syntax error messages are promptly feedback to improve the code writing efficiency.

[0033] 2. Clear error feedback: During code checking and execution, errors are captured through try-catch statements and specific error messages are feedback to the user to help developers quickly locate and solve problems.

[0034] 3. Code storage and loading: Provide a code storage function that allows users to save the entered code to local or server; support users to load the saved code from local or server, facilitating code reuse and modification and improving development efficiency. Description of the Drawings

[0035] Figure 1 It is the general flowchart of the present invention. Detailed Embodiment

[0036] The present invention will be further described below in conjunction with the drawings and embodiments.

[0037] As Figure 1 shown, the method of the present invention includes the following steps:

[0038] S100: Provide an input interface for JavaScript code: Provide a textarea element in the Web page to receive the JavaScript code entered by the user;

[0039] S200: Obtain the JavaScript code entered by the user.

[0040] Step S200 includes the following steps:

[0041] S201: Set a unique identifier for the textarea element:

[0042] S202: After obtaining the textarea element through the unique identifier, add an event listener to the textarea element to listen for input events;

[0043] S203: Listen for the input events of the textarea element to obtain the JavaScript code input by the user in real time;

[0044] S204: Store the obtained JavaScript code in a front-end variable for subsequent processing.

[0045] S300: Use the eval function to verify the syntax of the input JavaScript code:

[0046] Take the obtained JavaScript code string as a parameter and pass it into the eval function;

[0047] Use the eval function to execute and process the passed-in string as JavaScript code to verify the syntax of the input JavaScript code.

[0048] Determine whether the syntax of the input JavaScript code is correct. If so, execute step S600; otherwise, execute step 400;

[0049] S400: Feedback the syntax error of the input JavaScript code;

[0050] S500: Correct the currently running JavaScript code and execute step S200;

[0051] S600: Wrap the eval function with a try-catch statement to run the input JavaScript code. That is, place the call to the eval function in the try code block and immediately follow the try code block with a catch code block to capture and handle any exceptions or errors that may be thrown during the execution of the eval function:

[0052] Determine whether the running JavaScript code runs successfully. If so, execute step S800; otherwise, execute step S700;

[0053] S700: Feedback the running error of the input JavaScript code and execute step S500;

[0054] S800: Output and display the running result of the running JavaScript code;

[0055] S900: Store the running JavaScript code for reuse and modification of the currently running JavaScript code.

[0056] Step S900 includes the following steps:

[0057] Set an area on the page to display the results or error messages of the JavaScript code running;

[0058] Save the current JavaScript code to the local or server to store the current JavaScript code;

[0059] Load the saved JavaScript code from the local or server to reuse and modify the currently running JavaScript code.

[0060] Through the method provided by the present invention, the technical problem that there is no method for verifying and running Web front-end code in the prior art is solved.

[0061] It should be understood that the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A method for verifying and running Web front-end code, characterized in that It includes the following steps: S100: Provide an input interface for JavaScript code: In a Web page, provide a textarea element to receive the JavaScript code input by the user; S200: Obtain the JavaScript code input by the user; S300: Use the eval function to verify the syntax of the input JavaScript code, and determine whether the syntax of the input JavaScript code is correct. If so, execute step S600; otherwise, execute step 400; S400: Feedback the syntax error of the input JavaScript code; S500: Correct the currently running JavaScript code and execute step S200; S600: Wrap the eval function with a try-catch statement to run the input JavaScript code, and determine whether the running JavaScript code runs successfully. If so, execute step S800; otherwise, execute step S700; S700: Feedback the running error of the input JavaScript code and execute step S500; S800: Output and display the running result of the running JavaScript code; S900: Store the running JavaScript code for reuse and modification of the currently running JavaScript code.

2. The verification and running method of a Web front-end code according to claim 1, characterized in that Step S200 includes the following steps: S201: Set a unique identifier for the textarea element: S202: After obtaining the textarea element through the unique identifier, add an event listener to the textarea element to listen for input events; S203: Listen for the input events of the textarea element to obtain the JavaScript code input by the user in real time; S204: Store the obtained JavaScript code in a front-end variable for subsequent processing.

3. A method for verifying and running Web front-end code according to claim 1, characterized in that, Step S300 includes the following steps: Take the obtained JavaScript code string as a parameter and pass it into the eval function; Use the eval function to execute and process the passed-in string as JavaScript code to verify the syntax of the input JavaScript code.

4. A method for verifying and running Web front-end code according to claim 1, characterized in that, It is characterized in that Step S600 includes the following steps: Place the call to the eval function in a try code block, and immediately follow the try code block with a catch code block to capture and handle exceptions or errors that may be thrown during the execution of the eval function.

5. A method for verifying and running Web front-end code according to claim 1, characterized in that, It is characterized in that Step S900 includes the following steps: Set an area on the page to display the running result or error information of the JavaScript code; Save the current JavaScript code locally or on the server to store the current JavaScript code; Load the saved JavaScript code from local or server for reuse and modification of the currently running JavaScript code.

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