Let’s open with a cliffhanger.
An average developer spills 70 bugs for every thousand lines of written code (KLOC). In fact, fixing these bugs can take 30 times longer than writing the code in the first place. And probably this is why 15 bugs per KLOC eventually find their way to the customers.
Front-end development is no exception.
While the idea of a non-existent bug-to-code ratio is an ideal happenstance, real-life implications often intervene. For an average front-end development process, the ratio tends to zero without ever actually approaching it. With that in mind, the game plan to an error-free (marketing lingo) code becomes apparent – bringing down the bug-to-code ratio to its minimum possible value.
In the next section, we outline some of the best front-end developer tools that your development team can leverage to achieve such a feat without breaking a sweat:
1. Chrome DevTools
A debugging tool that is built directly into the Google Chrome browser, Chrome DevTools aims to help developers manipulate a webpage in real-time. Users can quickly edit pages, diagnose problems, and build better and faster websites.
Key features of Chrome DevTools
- Debugger: If you are working with a large codebase, this will help you access specific line-views. Developers simply need to drop a debugger; statement in the area that they need to inspect.
- Blackbox Script: Helps to BlackBox the vendor code so that the debugger does not jump out of the code, saving crucial debugging time.
- DOM Breakpoints: Isolates a DOM element so that when breakpoints are triggered, the tool highlights the code that’s changing the DOM in the source panel.
- Event Listener Breakpoints: fEliminates surfing through source codes to find event handlers. Any event from any object on a page can be captured.
Pros of Chrome DevTools
- The ‘inspect’ function neatly depicts the DOM structure.
- The comprehensive analysis tool is easy to use and helps to spot bottlenecks immediately.
Cons of Chrome DevTools
- Difficult to handle large code bases at times when developers cannot pinpoint the location of specific elements.
- There could have been a more intuitive way to segregate errors that are logged onto the console into classes like network, security, and CSS.
Price: Free, In-built Chrome Tool
Niche tool that empowers Angular developers to debug, profile, and optimize their projects. With a rich user interface, developers can see the graph tree of components and edit properties in them.
Key features of Augury
- Component Tree: Depicts the loaded components that belong to the application along with the hierarchical relationship between them.
- Change Detection: Displays whether this functionality is used in the components or not.
- Object Properties and Dependencies: Lists the properties and dependencies of the components.
- Router Tree: Depicts the routing information for the application.
Pros of Augury
- A visual debugging front-end developer tool that enables developers to visualize their applications.
- Particularly useful when a developer wants to know how a change detection trigger affects the component’s tree.
- Include all the necessary functions that are required to debug Angular apps through the browser itself.
- It makes it easy to modify component states and emit events.
Cons of Augury
- Maintenance of the tool has been an issue in the past.
- IDEs and browser dev tools can sometimes seem to be more developer-friendly.
Price: Free, Open Source
Key features of WebStorm
- Includes built-in tools for critical tasks such as debugging, testing and tracing applications, including both Node.js and client-facing apps.
- The front-end developer tool is easy to integrate with popular command-line tools that accelerate web development.
- Enables developers to work with multiple popular Version Control Systems via a unified user interface.
- Both coding and debugging can be customized for both Node.js and client-facing apps.
Pros of WebStorm
- The built-in spell checker saves time while resolving minute mistakes that can lead to bugs.
- Includes support for tslint, helping the entire angular development team to code to a single standard. This reduces the possibility of new bugs.
- File difference utilities are more focused on source control conflict scenarios.
Cons of WebStorm
- Resource heavy tool that may seem daunting to new frontend developers.
- The user interface has been known to be a bit complicated and may include a learning curve.
Price: US $59.00/user for the 1st year, US $47.00 for the 2nd year, US $35.00 for the 3rd year.
4. Node.js Inspector
Another niche entry on the list, Node.js Inspector is a debugging tool that acts as a debugger interface for Node.js applications. This makes debugging the Node.js on the application’s backed a breeze.
Key features of Node.js Inspector
- Ability to seamlessly navigate through source files.
- Developers can set breakpoints and specific the respective trigger conditions.
- The debugging process includes functions such as inspecting scopes, variables, and object properties.
- Includes CPU and HEAP profiling along with network client requests inspections.
Pros of Node.js Inspector
- The tool supports every critical feature DevTools, such as navigating the source files, setting breakpoints, inspecting scores and variables, and more.
- Includes provisions for remote debugging and live edits of codes in their run states.
- Developers get the ability to set specific breakpoints in files in a way that makes it easy to debug modules.
Cons of Node.js Inspector
- Every byte in Buffer objects is displayed as an individual array element.
- This may significantly increase the rendering time.
- The console may not stop at breakpoints at times and behave unexpectedly.
- Debugging multiple processes simultaneously can be a nightmare.
5. JS Bin
Key features of JS Bin
- Codecasting, where coding sessions can be recorded and cast out in real-time to various participants.
- Live code reloads in both the available views – editor and full preview.
- Linting with complete configuration control. This includes JSHint, CoffeeLint, CSSLint, and HTMLLint.
Pros of JS Bin
- Simple to use tool with a quick learning curve that is developer and resource-friendly.
- Test results of the code are not contaminated by conflicts generated by scripts or styles from other parts of the software.
Cons of JS Bin
- The requirement of pro accounts to take the code private.
- There is no option to save the original bin.
- A bin cannot (practically) be made private once it has been made public.
- If not logged in, saved bins cannot be deleted.
Price: Free version + Pro version (starting at £12.99+VAT)
Front-end debugging can often be challenging, especially if the development process has resulted in a high bug-to-code ratio. Armed with the right tools, you can easily overcome this hurdle by boosting debugging accuracy and developer productivity.