Debug Methods and Techniques in Browsers
12002The main purpose of debugging is to help programmers locate and resolve errors or exceptions in the code. Debugging allows you to trace the execution process of the program and find the specific location of the error.
1. Chrome Browser Breakpoint Debugging Techniques
The developer tools in Chrome browser have debugging capabilities and provide reference documentation to help you learn Chrome browser breakpoint debugging techniques.
2. Most Common Types of Errors
The code written in Course 002 consists of static pages. If they do not run correctly, the common types of errors include the following:
HTML/CSS Errors
- HTML Syntax Errors: For example, unclosed tags, attribute errors, etc.
- CSS Syntax Errors: For example, misspelled selectors, incorrect property values, etc.
JavaScript Errors
- Syntax Errors: For example, spelling mistakes, missing semicolons, etc.
- Undefined Variables: Attempting to access undeclared variables.
- Undefined Functions: Calling functions that are not defined.
- Type Errors: For example, attempting to perform operations on unsupported data types.
Resource Loading Failures
For example, if resources like CSS, JavaScript, or images fail to load, the following numbers may appear on the page:
- 404 Not Found: Indicates that the requested resource could not be found on the server. This is usually due to an incorrect URL, the file being moved or deleted, or the resource not being available on the server.
- 400 Bad Request: Indicates that the server cannot understand the request due to syntax errors or invalid parameters in the request.
- 403 Forbidden: Indicates that the server has refused the request because the client does not have permission to access the requested resource.
- 500 Internal Server Error: Indicates that the server encountered an unexpected error while processing the request and could not complete it.
Missing Libraries
- Vue.js library has not been included.
- Related libraries for VuetifyJS have not been included.