When comparing Visual Studio Code vs WebStorm, the Slant community recommends Visual Studio Code for most people. In the question“What are the best JavaScript IDEs or editors?” Visual Studio Code is ranked 1st while WebStorm is ranked 2nd. The most important reason people chose Visual Studio Code is:
Visual Studio Code comes fairly complete out of the box, but there are many plug-ins available to extend its functionality.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Extendable through plug-ins
Visual Studio Code comes fairly complete out of the box, but there are many plug-ins available to extend its functionality.
Pro TypeScript integration
There is very solid TypeScript integration in Visual Studio Code. Both are developed by Microsoft and VSC itself is written in TypeScript.
Pro Integrated debugging
VSC includes debugging tools for Node.js, TypeScript, and JavaScript.
Pro Ready to use out of the box
You don't need to configure and add plugins before being productive. However, you can add plugins if needed but for the basics you're well covered.
Pro Integrated terminal
There's no need to press alt+tab to go to a terminal: it is directly integrated into the editor. Shift+~
is a handy hotkey to toggle the integrated terminal.
Pro Great performance
For a 'wrapped' web-based application, Visual Studio Code performs very well.
Pro Libre/open source
Released under the MIT License.
Pro Fast and powerful
VS-Code has the speed of Sublime and the power of WebStorm. Perhaps this is the best software that Microsoft has ever created.
Pro JavaScript IntelliSense support
JavaScript IntelliSense allows Visual Studio Code to provide you with useful hints and auto-completion features while you code.
Pro Embedded Git control
Visual Studio Code has integrated Git control, guaranteeing speed, data integrity, and support for distributed, non-linear workflows.
Pro Updated frequently
There's a new release of Visual Studio Code every month. If you are one of the insiders then releases are daily.
Pro ESLint integration
ESLint integrates great. You can define your rules trough .eslintrc.* as usual and vs code will autofix your code on save. So your code is always in style.
Pro Extensions (aka plugins) are written in JavaScript
Extensions are written in either Typescript or JavaScript.
Pro Active development
It's really nice to see how the code editor evolves. Every month there is a new version with great communication of new features and changes.
Pro Integrated task runners
Task runners display lists of available tasks and performing these tasks is as simple as a click of the mouse.
Pro It has gotten really good
All it takes is one stop for all the features many people need.
Pro Custom snippets support
Snippets are templates that will insert text for you and adapt it to their context, and in VSC they are highly customizable.
Pro Huge community behind it
The ease of getting assistance and finding tutorials is increasing as the community grows.
Pro JS typechecking
It leverages TypeScript compiler functionality to statically type check JS (type inference, JSDoc types) with "javascript.implicitProjectConfig.checkJs": true
option.
Pro Python support
Excellent Python plugin, originally created by Don Jayamanne, now hired by Microsoft to extend and maintain the extension.
Pro Good support for new Emmet syntax
Pro High fidelity C# plugin
The Omnisharp plugin is very powerful providing full sln, csproj, and project.json support.
Pro Support RTL languages
It supports pretty web rtl languages like arabic languages when most of other editors don't support it.
Pro Inline definition picking and usages finding
These features allow you to have a glance at code without opening it as a whole in a separate tab. Moreover, editing is allowed.
Pro Node.js integration
WebStorm integrates with Node.js to allow for running, debugging, and unit testing of Node.js apps.
Pro Code refactoring support
To make sure your code can be easily maintained, you must first be sure to make it clean and tidy. This is the part where WebStorm really helps you. It automatically refactors your code by performing functions on it, such as extraction of variables, moving files, inline variable extraction, etc.
Pro Integrated code quality tools
WebStorm comes bundled with JSHint and JSLint. JSCS, ESLint, and Closure Linter can be installed via npm. They register as inspections and are customizable through IDE settings. They run automatically and will highlight potential issues. Pressing alt+enter on an issue will allow the user to view suggested fixes.
Pro Intelligent code completion
WebStorm has two types of autocompletion: structural completion and word expansion.
Structural autocompletion makes predictions based on its understanding of JavaScript objects, while the latter tries to predict the word currently being typed based on previously typed words. Word expansion also works in comments and docstrings and it's similar to vim's omnicompletion.
Both types of autocompletion work extremely well, have little to no problems and are quite fast even when loading suggestions on the go.
Pro Supports a wide range of plug-ins
Pro Maintains a local history
The local history feature in Webstorm tracks all your local changes in the source code that you are making. You can use it to view changes that you've made to your code and roll back whenever necessary.
Pro Typescript support
WebStorm offers typescript support for building typed JavaScript applications which improves refactoring and code completion, as well as helping to find bugs.
Pro Supports many JavaScript frameworks
WebStorm includes support for Meteor, Angular, and React.
Pro Reduces the amount of repetitive code that has to be written with code snippets
WebStorm includes a feature called Live Templates. Live Templates are predefined code snippets that can include variables. They're intended to increase productivity by reducing the amount of repetitive code that has to be written.

Pro Ability to base hot keys on previously used IDEs
When you install WebStorm, it allows you to choose from other IDE's for it to base it's hot keys on. So if you are switching from another IDE, it makes it a very easy transition and productivity is not adversely affected by having to learn new hot keys.
Pro Powerful git and GitHub integration
WebStorm has a powerful visual git tool, allowing for easy commits, visual diffing, merging, push/pull, rebasing, and inspecting the VCS history of a project. GitHub is supported natively - you can check out a project directly from GitHub.
Pro Built-in support for JavaScript task runners
WebStorm has support for Grunt and Gulp task runners.
Pro Built-in terminal/run tools
WebStorm (and really all of the IntelliJ IDEs) support the plugins throughout their plugin ecosystem which leaves you with 100s of tools to handle your automation tasks. There is a wide range of build-related plugins that help you by having pre-defined commands to execute with the click of a button. Out of any other IDE, WebStorm has by far the most coverage when it comes to tools for your development workflow.
Pro Theme support / tweaking
The theme is very easy to customize to your liking. You can change font-size, colors, highlighting colors, and more.
Pro Support for all major VCS systems
Webstorm supports not just Git and Mercurial, but Subversion, CVS, and Perforce as well.
Pro Multi-line select and editing
Pro Really good configurable code formatting
This integrates with other community tools like ESLint and editorconfig.

Pro Powerful Code Templates
Code Templates are powered by Apache VTL (Velocity Template Language) and allow for includes, custom variables, conditional blocks, iterators, and live templates.
Pro Special icons for most filetypes in project list
Webstorm comes with icons for many filetypes which makes it easier to find what you're looking for in the project list.
Pro Built-in web server
WebStorm has a built-in webserver that allows you to run projects from http://localhost:63342/ProjectName
.
Pro Has a built-in terminal
The IDE comes with a built-in terminal, a feature lacking in some lighter editors.
Pro Compilers for compile-to-JavaScript languages
WebStorm has built-in support for CoffeeScript and Dart.
Pro Support for Karma test runner
Karma allows you to execute unit tests and monitor code coverage. You can read more about using Karma with WebStorm here.
Pro CSS pre-processor support
WebStorm has built-in support for Sass which is one of the most stable and powerful CSS extension languages.

Pro Server and client-side debugger
WebStorm has a powerful debugger, with support for conditional breakpoints.
Pro Auto sync settings across team / machines / platforms
With the settings repository, you can easily enforce your development standards.
Pro Free for open-source development, students, and teacher
Non-commercial open source projects, and students and teachers (including classroom licenses) may qualify for a free license. There is a 50% off license for startups (under 3 years old). You can read more about it here.
Pro Different configurations for different projects
It is able to specify for example node versions, which will be used to run task for current project.
Pro Webpack support
Assists with configuration and understands module resolution.
Pro Cordova support
Cordova allows for building native mobile applications via HTML, CSS, and JavaScript.
Pro Dart language support
Autocompletion, syntax-highlighting, refactoring, and pub integration for Dart are supported in WebStorm.
Pro Coffeescript support
Autocompletion, syntax-highlighting.
Pro Low memory use
It may seem like a complex IDE and it does have a lot of functionality, yet it uses way less RAM than barebones-looking, Electron-based IDEs.
Pro Gulp support
Pro Interactive theme (color scheme) editor
Makes adjusting an existing or creating new themes a breeze. Especially due to things like inheritance, as well as easily exporting/distributing/importing the color settings which really only store where on deviates from the defaults (thus the resulting files are very small and relatively human-readable).
Pro Efficient and effective
Cons
Con Embedded Git isn't powerful enough
You can do nothing but to track changes, stage them and commit. No history, visualization, rebasing or cherry-picking – these things are left to git console or external git client.
Con The autocomplete and code check is not as powerful as the one on WebStorm
Sometimes it doesn't tell you if you made a typo in a method name or if a method is not used and several other important features.
Con File search is extremely slow
It's absolutely not possible to use this tool with big projects given how long it takes to search for files.
Con Project search limits results
Because file search is so slow your results are limited in order to simulate a faster search.
Con Very bad auto import
Con Generalized
VS Code is a general code/scripting IDE built to be lightweight and for people familiar with their language of choice, not directly comparable to Visual Studio in power or scope.
Con Memory hog
Allegedly, VS Code is "lightweight". Yet, running multiple instances of it at once, you may get many "out of memory" messages from Windows despite 16 GB RAM. (While of course also running other things. The point is the comparison with some other IDEs/editors where running them alongside the same number of other applications doesn't cause Windows to run out of memory)
Con Poor error fix suggestions
Error detection and suggestions/fixes are poor compared to IntelliJ platforms
Con A "me too" offering from MS, far behind other well established editors that it attempts to clone
Other IDEs specific to a language often offer better tools for deep programming.
Con Slow launch time
Slower than it's competitors, e.g. Sublime Text.
Con Emmet plugin often fails on even simple p tags
Con Have no good default js style analyzer
In WebStorm there is analyzer that checks for warnings and highlight this in yellow, here you cannot find or add it even with plugins. It is possible to have it as errors with linter but while you are actively changing file that's not very nice.
Con .sass linting is terrible
Con Is not an IDE, is a text editor

Con Occasional slow performance
WebStorm can sometimes choke all cores of the CPU. There are numerous reports of high CPU usage.
Con Not free for commercial use
A paid license is required to use WebStorm for commercial use. The license terms changed in November 2015 and currently require a subscription (per year: $59 personal, $129 for companies). Students can obtain a free non-commercial, educational license good for one year. There is also an option to pay on a monthly basis in addition to perks, such as a fallback commercial license that can be used for free.

Con Not open source
This application is proprietary, and thus cannot be modified, freely distributed, or trusted for security.
Con You may have to fiddle with the JVM memory settings in configuration files
To get it to run properly, you have to edit the JVM memory settings when you use Node.js. Node.js makes the small JS project you have into a "large" project that requires more memory.
Con Plug-in ecosystem isn't robust
Every framework or extension with any popularity whatsoever will have a plugin for VS Code. Sometimes they'll still support Atom. Only one in twenty will have native support for WebStorm.
If you want support for the latest libraries, you won't get it in WebStorm.
Con Non-native filesystem causes issues
The Java wrapper around the filesystem doesn't actively watch for file changes (by, for example, using the fsevents api on OS X), and as a result can become easily desynchronised from the actual filesystem.
If you have an external tool acting on your project (such as a gulp task or a third-party Git client), what you see in the file browser or in open tabs becomes out-of-date. There's a feature in the context-menu for manually synchronising directories with their real filesystem equivalent, but this shouldn't be necessary and is annoying to do. You usually remember to do that anyway after you've been trying to track down a bug on a line of JavaScript that Webstorm says doesn't exist for the last two hours.
It should be noted though that this is easily remedied by going to File/Settings/System Settings and checking the "Synchronize Files on frame or editor tab activation" option. It's also recommended to more explicitly represent your workflow within WebStorm itself. Most external tools/tasks can be handled with WebStorm. And if it's not in a plug-in, then you can handle it with the File Watchers.
Con Proprietary file dialogs
Webstorm doesn't use the native Windows and OSX file dialogs, which makes it more of a hassle to open projects.
For instance, you don't have access to your favorite folders on the left-hand side in their custom file dialogs.
Con Can't open multiple projects in a single instance
The only way to open multiple projects is to run a new instance of WebStorm which is not ideal. WebStorm can use up to 1-1.5 GB of memory.
Con Poor usability on option and menu navigation
You need to press a combination of keys or navigate through different menu levels to carry out the two most common things a developer does. For example, to run your code, the default is Shift+F10. To go to definition, you need to click on "Navigation" first. There is no sense to this: being forced to press a combination of keys hundreds of times or navigating through different menus can be a waste of time.
Con Bad default options compared to the competition
Examples are an unreasonably low number of undo steps and automatic saving (which causes webpack dev server to bundle VERY frequently).
Con Constantly trailing behind on support for its main features
The Jetbrains team do an admirable job attempting to keep up with support for the features they wrap, but they are running an un-winnable race. For example, WebStorm 11.0.2 hangs when trying to debug NodeJS 5.0+ projects (30+ seconds before hitting breakpoint). By the time they fix it, 5.1 will be out and something else will break.

Con Newer versions are increasingly unstable
This only happens when it's not a major version.
