What is the difference between syntax and runtime errors in web development?

If you are a web developer, you have probably encountered syntax and runtime errors at some point in your coding journey. These are two common types of errors that can affect the functionality and performance of your web applications. But what exactly are they, and how can you prevent and fix them? In this article, we will explain the difference between syntax and runtime errors, and give you some tips and tools to debug your code.

1 Syntax errors

Syntax errors are mistakes in the structure or grammar of your code. They occur when you write something that does not follow the rules or conventions of the programming language you are using. For example, if you forget a semicolon, a bracket, or a quotation mark in JavaScript, you will get a syntax error. Syntax errors are usually easy to spot and fix, because most code editors and browsers will highlight them and tell you where they are. However, sometimes syntax errors can be subtle or hidden, and cause unexpected results or bugs in your code.

Add your perspective

Martin Kiryakov

Business Analyst | Project Management | Driving Digital Transformation | End-to-End Solutions Expert
Report contribution
In a challenging personal web project, I tackled JavaScript syntax errors head-on. With tenacity, I hunted down missing semicolons and brackets, learning from each mistake. I didn't just fix errors; I improved the site's functionality, ensuring a smooth user experience and leaving the client delighted.

Like

2 Runtime errors

Runtime errors are mistakes in the logic or behavior of your code. They occur when you write something that does not make sense or cannot be executed by the programming language or the environment you are using. For example, if you try to divide a number by zero, access a property of an undefined object, or use a function that does not exist in JavaScript, you will get a runtime error. Runtime errors are harder to detect and fix, because they may not show up until you run your code or test a specific scenario. Sometimes runtime errors can also crash your application or cause security issues.

Add your perspective

Martin Kiryakov

Business Analyst | Project Management | Driving Digital Transformation | End-to-End Solutions Expert
Report contribution
In a coding project, I encountered unexpected results in my data processing. After a quick review, I realized I hadn't implemented a proper for loop in one crucial section of the code. This meant the data wasn't being processed correctly. Once I fixed the loop, the application ran smoothly, underlining the importance of careful loop implementation in programming projects.

Like

3 Debugging tools

To avoid and solve syntax and runtime errors, you can use debugging tools that allow you to inspect, modify, and test your code. Code editors are programs that let you write and edit your code with features such as syntax highlighting, code completion, error detection, and code formatting. Browser dev tools are built-in features in web browsers that let you inspect and manipulate the elements, styles, scripts, and network activity of your web pages with features such as console, debugger, sources, and network. Testing frameworks are libraries or tools that let you write and run automated tests for your code with features such as assertions, mocks, spies, and coverage. All of these debugging tools can help you find and fix errors in your code.

Add your perspective

Martin Kiryakov

Business Analyst | Project Management | Driving Digital Transformation | End-to-End Solutions Expert
Report contribution
If you're using Visual Studio Code as your code editor, its built-in debugger is fantastic. It supports various programming languages, allowing you to set breakpoints, inspect variables, and control the execution flow right from your editor.

Like

4 Debugging tips

Debugging your code effectively requires following some best practices and tips that can save time and avoid frustration. Descriptive and consistent naming conventions for variables, functions, and files can help prevent confusion and typos that cause errors. Additionally, comments and documentation should be used to explain the purpose and logic of your code. Console.log() statements can print out values and types of variables, parameters, and expressions to check if the code is doing what you expect and where the errors are. Breakpoints and step-through commands can pause and resume the execution of your code so you can examine and modify the state and flow. Try-catch-finally blocks should be used to handle and recover from potential errors, while debugging tools and testing frameworks can help you find and fix errors faster.

Add your perspective

5 Debugging skills

Debugging skills are essential for web development, as they can help create and deliver high-quality, reliable applications. It's not just about knowing how to use the tools and techniques, but also having the right mindset and attitude to solve problems and learn from mistakes. To improve your debugging skills, practice debugging regularly and deliberately. Try debugging different types of errors, scenarios, and codebases. Learn from debugging resources and communities by reading tutorials, guides, and blogs. Watch videos, podcasts, and webinars. Join forums, groups, and chats. Ask and answer debugging questions and give feedback. Adopt a debugging process and strategy that follows a systematic and logical approach. Break down the problem into smaller parts and use the scientific method of hypothesis, experiment, and conclusion. Use the rubber duck method of explaining your code to a rubber duck or a friend. By understanding syntax/runtime errors and using the right tools, tips, and skills to debug your code, you can become a better web developer.

Add your perspective

6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

Add your perspective

Martin Kiryakov

Business Analyst | Project Management | Driving Digital Transformation | End-to-End Solutions Expert
Report contribution
From my experience, with any kind of erros you encounter follow this process: 1.Keep everything clear, simple and understanbale. 2.When you think you are finished always debug and check. 3. Check syntax. 4. Leave it for a bit and do the following process again

Like

What is the difference between syntax and runtime errors in web development?

1

2

3

4

5

6

1 Syntax errors

2 Runtime errors

3 Debugging tools

4 Debugging tips

5 Debugging skills

6 Here’s what else to consider

Web Development

Rate this article

Thanks for your feedback

More articles on Web Development

More relevant reading

What is the difference between syntax and runtime errors in web development?

1

2

3

4

5

6

1 Syntax errors

2 Runtime errors

3 Debugging tools

4 Debugging tips

5 Debugging skills

6 Here’s what else to consider

Web Development

Rate this article

Thanks for your feedback

Explore Other Skills