What Went Wrong
- This section covers common errors in JavaScript and how to use browser developer tools to debug them.
- Some common errors include syntax errors, runtime errors, and logical errors.
- Browser developer tools can help identify errors by displaying error messages in the console and allowing you to set breakpoints and step through code.
- Browser developer tools are built-in tools in web browsers that allow developers to inspect and debug web pages.
- The tools include a variety of features such as a console, network inspector, and the JavaScript debugger.
- The JavaScript debugger allows you to step through your code line by line, set breakpoints, and evaluate expressions.
- The network inspector allows you to monitor network traffic and see how your web page is loading.
Debugging CSS
- This section covers how to use browser developer tools to debug CSS.
- Common issues with CSS include incorrect selectors, conflicting styles, and specificity issues.
- The browser developer tools allow you to inspect the CSS for an element, see which styles are being applied, and test changes in real-time.
- You can also use the “computed” tab to see how the styles are being computed and the “console” tab to test CSS selectors and evaluate expressions.
Answers to Questions on Debugging CSS and JavaScript
Key Differences between Syntax Error and Logic Error
- Syntax errors are rule violations; logic errors produce unexpected results.
- Syntax errors appear as error messages, while logic errors require debugging tools.
Types of Errors and How to Correct Them
- In past assignments, I corrected undefined variables, syntax errors, and logical errors.
- I identified the errors with the browser developer tools and made corrections in the code.
Influence on Long-term Goals
- Debugging skills are essential for software development and will continue to be important in my long-term goals.
- Efficient error identification and correction are crucial to delivering high-quality software.
- The JavaScript debugger is a browser tool that allows you to inspect variables and behavior line by line, set breakpoints, and evaluate expressions.
- It works by pausing code execution at specified points, allowing for inspection and modification.
Definition of Breakpoint
- A breakpoint is a point in the code where the debugger pauses execution, allowing for code behavior inspection and identification of issues.
- Breakpoints can be set manually or using the
debugger statement in the code.
Definition of Call Stack
- The call stack is a data structure used by browsers to keep track of the current execution context of the code.
- It stores a list of function calls, with the most recent call at the top of the stack.
- The stack is updated when a function is called or returned.