When learning front-end development, I often needed to run some test code. At the time, I mostly used online tools such as Chinaz's webmaster tools. Now that I have more or less mastered front-end technologies, I decided to build an online tool myself to help more people learn front-end programming more conveniently. Here is a demonstration image of the tool:

About the LOGO: The current LOGO was designed casually, and it is indeed a bit ugly (haha). Please don't mind it; it will be improved later.
Features of the Online Tool
- Responsive Design
The front end uses the Bootstrap framework, allowing the page to display properly on mobile phones, tablets, and computers. - Real-Time Code Execution
A modern framework is used to run code, so there is no need to refresh the page and navigate away as with traditional tools. - Code Syntax Highlighting
By integrating syntax highlighting, learning and debugging become more convenient. - Error Notifications
Real-time code error notifications are provided to help users quickly locate and fix problems.
Styles and Technology Stack
- The page styles primarily use the Bootstrap framework, which is simple and easy to extend.
- Syntax highlighting is supported for code in multiple languages (HTML, CSS, and JavaScript).
- The error detection feature integrates a simple and effective error reporting module.
The features and interface will continue to be optimized in the future. Suggestions and feedback are welcome~