I love ’ IDEs. I’ve been a faithful user since ’s release, seven years ago. JetBrains PyCharm As of late, if I’m watching a presentation, and someone is writing code in an editor, that editor is . almost always VSCode Something’s up, . People rave about this thing. and I’m going to get to the bottom of it I’ll answer some questions for myself — and, with luck, maybe I can save the JetBrains-faithful some time and energy. I aim to discover: Does it support my key bindings, or will I need to relearn everything? What’s the analog of a “Run Configuration?” What’s debugging look like? How’s the source map support? How easy is it to configure? How’s the extension ecosystem? How does the VCS (Git) integration differ? What’s the story on inline errors or warnings? How smart is it about types and code completion? I’ll be looking at this from the standpoint of a developer, so I’ll write “WebStorm,” but I really mean “a JetBrains IDE.” JavaScript I’m certainly interested in how VSCode handles Python and C/C++, but I’m not going to explore it in this post. First Impressions I used to install it: Homebrew Cask $ brew cask install visual-studio-code==> Satisfying dependencies==> Downloading https://az764295.vo.msecnd.net/stable/f88bbf9137d24d36d968ea6b2911786bfe103002/VSCode-darwin-stable.zip==> Verifying checksum for Cask visual-studio-code==> Installing Cask visual-studio-code==> Moving App 'Visual Studio Code.app' to '/Users/boneskull/Applications/Visual Studio Code.app'.==> Linking Binary 'code' to '/usr/local/bin/code'.🍺  visual-studio-code was successfully installed! This takes ~4s on my 2016 MBP — but I don’t have any extensions installed yet. I’m greeted with this: VSCode’s “Welcome” Page It has also opened a web page in Chrome: Online tutorials & such for VSCode I ignore the web page (thanks, but no thanks) and click a few of the “Install support for…” links under to get some basic extensions installed. I want to avoid customizing too much at the outset. Since C/C++ isn’t listed on the “Welcome Page”, I dig into to the extensions and … can’t help myself from installing a bunch of extensions. Oops. Tools and languages I am, however, elated to report that the is a thing, and it works great. JetBrains IDE Keymap I go ahead and open up my working copy… Mocha Summary You will install many extensions. Install “Extension Packs” to get started quickly. There’s . plenty of tutorials If you’re using the default bindings in WebStorm, you likely want to extension. install the JetBrains IDE Keymap Key bindings are at once more powerful and complex than WebStorm. It’s , but also . difficult to discover what a particular keystroke does at any given time supports conditionals, for a nearly absurd level of control Close Encounters with Version Control OK, so I want to edit Mocha’s . But I know has changes I need to pull. CHANGELOG.md origin Happily, VSCode understands this is, in fact, a working copy. To pull, I found a little “refresh” button in my status bar, and clicked it. I it worked? It said “sync.” What’s a “sync”? think I’m unsure what just happened. Which changesets did Git pull? I want to look at the history. After searching in vain, I realize that there is , and I’m going to need to grab an extension for this. no built-in support for Git history seems to solve this problem (and others). But there are Git-related extensions for VSCode. This is a drawback of the “small core” philosophy of VSCode (this reminds me of the Node.js ecosystem). To VSCode’s credit, it aids discovery with tags, filters and sorting. GitLens many GitLens does some oddball things like “inline blame” and “code lens” (which is another view into “blame”? I don’t get it). I want to turn this noisy stuff off. Hint: run and from the Command Palette. GitLens: Toggle Code Lens GitLens: Toggle Line Blame Annotations GitLens then provides Git history in the left sidebar. The presentation of the repo is a little disorienting (there are so many trees, it’s like a forest), but I see the pulled changesets. do Whew. I’ve made my changes to , and it’s time to commit. VSCode helpfully marks the file with a big in the file list. . CHANGELOG.md M +1 I find via the Command Palette, and realize I could have used my trusty . But I’m prompted that the stage is empty. Git: Commit ⌘-K If you use WebStorm’s built-in version control client (I don’t), this will be culture shock. VSCode uses the stage, like literally Git client except WebStorm’s. only every other I go ahead and commit everything (including unstaged changes; this would be if I wanted to avoid the prompt), and push. Git: Commit All Not the nicest initial experience, but I’m confident it’ll be smoother sailing from here. Next, I’ll run Mocha’s test suites to prepare for publishing. Summary You will likely want to , due to VSCode’s basic client implementation. install the Git extension pack VSCode , unlike WebStorm. uses the stage VSCode instead of you into oblivion. automatically enables Git support for working copies prompting Tasks in VSCode I think a “Task” is perhaps a “Run Configuration” or “External Tool”. “Tasks” are the same as “Tasks” in a WebStorm, which is WebStorm’s (leaky) abstraction around issues, staged changes and branching. not Let’s see what “Configure Tasks” does… What’s do you call a widget like this, anyway? Ooook. that needs some further explanation, but sure. Is it trying to automatically detect my npm scripts? For reference, Mocha’s in its is literally just: scripts package.json {  "scripts": {    "prepublishOnly": "nps test clean build",    "start": "nps",    "test": "nps test"  }} I’ll roll the dice with . npm: test VSCode creates and opens a file: .vscode/tasks.json At least it’s not XML, amirite? . I click the link and . It’s unclear whether VSCode intends for the user to commit to VCS (I don’t do so; in fact, I add to my post-haste). Fascinating learn about this file .vscode/ .vscode/ .gitignore VSCode likely didn’t need me to “configure” the Task — it discovered the script itself. I execute , choose , and the output opens in a terminal, as you’d expect. Run Task… npm: test I’m now certain “Tasks” are analogous to “External Tools”. Like in WebStorm, the user (seemingly) a Task, and there’s little integration. VSCode ships with some helpers for common build tools (unfortunately, is not one of them). Like WebStorm, the user has free rein to create a “shell”-based Task. cannot debug nps I’m still looking for the analog of a “Run Configuration,” which appears to be a “Debug Configuration,” though it’s just called “Configuration” under VSCode’s “Debug” menu. Next, I’ll take it for a test-drive. Whatever the hell it’s called. Summary . “Tasks” in VSCode are analogous to WebStorm’s “External Tools” . This isn’t too awesome, but VSCode provides validation/completion when editing, which is better than nothing. Configure tasks via JSON files You must . I’ve had success committing sliver of to VCS, but maybe the story is different here. Don’t look at me; find some other guinea pig. choose whether or not to commit **.vscode/** to VCS never any .idea/ Trivia: VSCode recognizes the filetype of as “JSON with Comments”, which, AFAIK, is unadulterated, imaginary nonsense. Is it or not? tasks.json JSON5 Debugging Photo by / Mink Mingle Unsplash First, I install the , since I figure I’ll need it to debug properly. Node.js Extension Pack From VSCode’s menu, I open . I’m presented with a new file, . Like , this is my config file. Debug > Open Configurations .vscode/launch.json tasks.json This menu item inexplicably corresponds to the command . Debug: Open launch.json In Node.js Do you want the good news or bad news first? I don’t care. The is, I can’t just throw in and expect my breakpoints to get hit. Why not? Because spawns , which spawns ten different processes in series, each which spawn , and many of which spawn . bad news npm test launch.json npm nps mocha _mocha _mocha again This is by no means VSCode’s fault, but the story around debugging subprocesses in Node.js is a sad one. I’d be foolish to expect a miracle. The is that if I choose some subset of the tests to run with , debugging works well (unless I want to debug more child processes). It’s a solid debugging experience, though lacking some of the bells & whistles of WebStorm’s debugger. good news bin/_mocha In a Browser Debugging tests with , awkward is. Karma In a WebStorm, you create Karma-based run configuration, point it to your config file, specify any particular browsers or other extra options, and push the button. It works well, even if you happen to be bundling your code with , which Mocha is. karma-browserify This is the VSCode experience: You need to install the extension. Chrome Debugger Create a debug configuration identical to: chrome {  "type": "chrome",  "request": "attach",  "name": "Attach to Karma",  "address": "localhost",  "port": 9333,  "pathMapping": {    "/": "${workspaceRoot}/",    "/base/": "${workspaceRoot}/"  }} Modify your ( , really?) to add a custom launcher to your setup object. The port below must be the same port as above. Hope it’s not in use! karma.conf.js ugh {  customLaunchers: {    ChromeDebug: {     base: 'Chrome',      flags: ['--remote-debugging-port=9333']    }  }} Start Karma (you can create a Task to do this): . Leave it running. karma start —-browsers ChromeDebug --auto-watch --no-single-run Run your “Attach to Karma” debug configuration; choose it from “Debug” > “Run Configuration…”. At this point, you can set breakpoint(s) by clicking in the editor’s gutter, though they will not immediately be enabled. There appears a small, odd, quasi-movable toolbar near the top of the window. Within this impish toolbar is a “refresh”-looking button; click it to re-run the tests. VSCode will then be able to discover which scripts/files Karma loaded. If you’re lucky, it’ll even hit your breakpoint! The above took a solid hour to figure out, even with a few scattered examples out there. The last thing I want to evaluate is VSCode’s “IntelliSense” capabilities. Summary . I’m calling them “Debug Configurations”, so there. “Run Configurations” = “Debug Configurations” , like “Tasks”. Configure “Debug Configurations” via JSON VSCode has without support for features such as enabling/disabling based on previous breakpoints, or disabling once hit. very basic breakpoints . I couldn’t find a Karma-specific extension to help with this. Debugging in Karma is a poor experience Code Completion, Inspections, & Intentions (Oh My) Assuming you use ESLint, install the . ESLint extension In terms of inspections, I just want ESLint to run on my JavaScript. I don’t need any other inspections, so I disable all the random crap WebStorm ships with. The ESLint extension “just works,” and the user sees the same type of inline inspections as from ESLint within WebStorm, right down to the intentions, like “Fix file with ESLint”. The Node.js Extension Pack provides some npm-related “IntelliSense,” which knows important stuff about , like if a package is missing or extraneous, will tell you so, and automatically fix it for you via an intention. package.json Is “IntelliSense” a trademark or something? It’s a Microsoft-ism, right? I am pretty sure I hate this word. I believe VSCode uses TypeScript definitions under the hood (not just in TypeScript files) to inspect code, at least in part. This results in code completion, jump-to-declaration, and the like. If there’s any “killer feature” for JavaScript developers, it’s this. You can coax such behavior out of WebStorm, but it will still be much more sluggish. extremely accurate and nearly instantaneous A “deep dive” into this would be an excellent source of information for WebStorm users (think: CSS, HTML, TypeScript, template languages, etc.), but is unfortunately out-of-scope. I’ll end with my final thoughts below. Summary VSCode (and/or its extensions) provide . accurate, zippy code-completion and inline docs for JavaScript VSCode If you use them, you’ll miss them, unless you find alternatives. does not ship with a bunch of built-in inspections. The . ESLint experience is strong The . npm-related experience is excellent VSCode: The Verdict Photo by / chuttersnap Unsplash Visual Studio Code is . It’s comparable with WebStorm — by way of extensions — in terms of feature set. It has a couple notable advantages over WebStorm, however: better than I expected VSCode is generally faster and more responsive than WebStorm VSCode’s JavaScript inspection/completion experience is just plain better Free as in beer Much exciting! Notable disadvantages include: Poor browser-based debugging experience (for me, anyway) Piecemeal (though complete) Git support JSON-based configuration No customer support As a developer, my code editor my most important tool. Having spent many years with JetBrains and WebStorm — and having very little dissatisfaction — a different tool must be compelling for me to want to pick up. incredibly My advice for WebStorm users? Don’t try VSCode unless you are prepared to switch. This article originally appeared March 9, 2018 on boneskull.com .

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