Visual Studio Code Refactor
Muredac Boule
Source code refactoring can improve the quality and maintainability of your project by restructuring your code, while not modifying the runtime behavior. Visual Studio Code supports refactoring operations (refactorings) such as Extract Method and Extract Variable to improve your codebase from within the editor.
For example, a common refactoring used to avoid duplicating code (a maintenance headache) is the Extract Method refactoring, where you select source code and pull it out into its own shared method, so that can reuse the code elsewhere.
Refactorings are provided by a language service. VS Code has built-in support for TypeScript and JavaScript refactoring through the TypeScript language service. Refactoring support for other programming languages is enabled through VS Code extensions that contribute language services.
Renaming is a common operation related to refactoring source code, and VS Code has a separate Rename Symbol command (F2). Some languages support renaming a symbol across files. Press F2, type the new desired name, and press Enter. All instances of the symbol across all files will be renamed.
When you apply a refactoring, the changes are directly implemented to your code. In the Refactor Preview panel, you can preview the changes that will be applied by a refactoring operation.
Code Action kinds are specified by extensions using the enhanced CodeActionProvider API. Kinds are hierarchical, so "kind": "refactor" shows all refactoring Code Actions, whereas "kind": "refactor.extract.function" only shows Extract function refactorings.
Using the above keybinding, if only a single "refactor.extract.function" Code Action is available, it is automatically applied. If multiple Extract function Code Actions are available, VS Code brings up a context menu to select them:
When a Code Action keybinding is configured with "preferred": true, only preferred Quick Fixes and refactorings are shown. A preferred Quick Fix addresses the underlying error, while a preferred refactoring is the most common refactoring choice. For example, while multiple refactor.extract.constant refactorings might exist, each extracting to a different scope in the file, the preferred refactor.extract.constant refactoring is the one that extracts to a local variable.
Light bulbs (Code Actions) are only shown when the cursor is over the text showing the error. Hovering over the text shows the error description, but you need to move the cursor or select text to see light bulbs for Quick Fixes and refactorings.
Source code refactoring can improve the quality and maintainability of your project by restructuring your code while not modifying the runtime behavior. Visual Studio Code supports refactoring operations (refactorings) such as Extract Method and Extract Variable to improve your code base from within your editor.
Visual Studio Code has built-in support for TypeScript refactoring through the TypeScript language service and in this topic we'll demonstrate refactoring support with the TypeScript language service.
Move to new file - Move one or more classes, functions, constants, or interfaces in the top-level scope of the file to a new file. The new file's name is inferred from the selected symbol's name.
Refactoring your code helps your team manage technical risk. The act of refactoring improves code quality and maintainability. This, in turn, removes the risk of accumulating technical debt when building features. It also aids in writing tests. Refactoring can help you identify and address technical issues quickly and effectively.
The above commands are most useful for quickly navigating and finding function definitions in Visual Studio Code. For instance, you want to figure out in which files a particular function has been used. Therefore, you can use the above commands to solve such tasks quickly.
When refactoring code, web developers often can't resist criticising poorly chosen filenames. On top of that, refactoring code means shifting code between different files and changing the purpose of certain modules. As a result, broken imports can be a common issue when refactoring is complete.
Thankfully, Visual Studio Code can help save developers from having to scan through all files to find broken imports manually. When a filename is changed in Visual Studio Code, the user will be asked if they'd like to update imports automatically. To do so, select the "Always automatically update imports" option. This can be tested by renaming the `retrieve.js` file from the previous example.
Stepsize enables teams to decide what to refactor and report issues seamlessly from within VS Code. But it does so much more. Ultimately, Stepsize enables elite engineering teams to radically improve quality, efficiency and predictability.
We need to add Prettier configuration rules to tell Visual Studio Code how to format our document. The easiest way is by creating a `.prettierrc`configuration file in the project's root. This file will contain a JSON object which holds all the active rules. The advantage of this approach is that you can commit the configuration file to your repository to enforce the same coding standards across your team. This standardisation will reduce refactoring work in the future.
JavaScript Booster is a code refactoring tool that features several coding actions such as converting var to const or let, removing redundant else statements, and merging declaration and initialisation. Just note the light bulb at the left and press it to learn how to transform the code under the cursor.
SonarLint lets you fix coding issues before they exist: like a spell checker, SonarLint highlights Bugs and Security Vulnerabilities as you write code, with clear remediation guidance so you can fix them before the code is even committed. SonarLint in VS Code supports analysis of JavaScript, TypeScript, Python, Java, HTML & PHP code.
But it doesn't stop at providing data; CollabGPT makes actionable suggestions for next steps, keeping your projects on track and your codebase healthy. With CollabGPT, efficient collaboration and continuous code improvement become a practical reality.
Choose linting tools that make sense for your codebase, and use them consistently in your workflow. Use linters alongside Stepsize to ensure your team is tracking code that needs refactoring and building it into your sprints.
Thus, 2 months ago, I decided to follow my own advice and hack my own problem. I started creating the VS Code extension I was looking for. This extension analyzes my code, suggests refactorings and executes them with the minimal amount of keystrokes needed.
But for the moment, I wanted to build something on my own. Not to replace the existing extension, but to try something different. Something aligned with what I needed. Without having to deal with existing code and users.
You can find the actions in the quick fix and refactoring context menus. They depend on the cursor position, the selected text (if any), the source code, the language type, and any available type information.Underlining with three dots suggests beneficial refactorings that you can perform. The suggestion panel shows you recommended refactorings for your whole file.
Boolean logic can be challenging to read, especially as expressions get more complex. The JS Assistant provides several refactorings that can help you simplify and tease apart logical expressions to make them easier to understand:
Branching statements such as if-else and switch are central elements in many programs. Restructuring them can increase the readability of your programs, often in combination with refactoring their conditions:
JavaScript has several ways of defining loops and many array methods that work on the whole array. The JS Assistant provides several code actions for converting between different types of for loops and for converting to more idiomatic array methods such as array.includes().
Text manipulation has become more powerful with the introduction of template literals in JavaScript. The JS Assistant offers several code actions to help you work with text, be it strings or template literals:
It is often annoying to make small syntactical changes by editing text. Often more than one position needs to be edited, and the code is broken during the edit, leading to incorrect errors and auto-completions that get in the way. You can execute the following syntax conversions with code assists:
The Javascript ecosystem is progressing rapidly. However, it is hard to keep codebases up-to-date with the newer JavaScript features, and codemods are not always an option due to their significant churn and potential for breakages. The JS Assistant supports both codemod-like mass code refactoring and more opportunistic code modernization for the following upgrades:
Code cleanups remove unnecessary code. Such code can result from code churn, e.g., by applying other refactorings, adding new features, or fixing bugs. The JS Assistant shows hints and automates the cleanup for the following situations:
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Visual Studio Code is a lightweight but powerful source code editor which runs on your desktop and is available for Windows, macOS and Linux. It comes with built-in support for JavaScript, TypeScript and Node.js and has a rich ecosystem of extensions for other languages and runtimes (such as C++, C#, Java, Python, PHP, Go, .NET).
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