Merge pull request reactjs#1705 from vvscode/patch-1

Fix command for initializing tsconfig

Author: lex111

content/docs/static-type-checking.md

@@ -216,10 +216,18 @@ Congrats! You've installed the latest version of TypeScript into your project. I
 ```
 
 ### Configuring the TypeScript Compiler {#configuring-the-typescript-compiler}
-The compiler is of no help to us until we tell it what to do. In TypeScript, these rules are defined in a special file called `tsconfig.json`. To generate this file run:
+The compiler is of no help to us until we tell it what to do. In TypeScript, these rules are defined in a special file called `tsconfig.json`. To generate this file:
+
+If you use [Yarn](https://yarnpkg.com/), run:
+
+```bash
+yarn run tsc --init
+```
+
+If you use [npm](https://www.npmjs.com/), run:
 
 ```bash
-tsc --init
+npx tsc --init
 ```
 
 Looking at the now generated `tsconfig.json`, you can see that there are many options you can use to configure the compiler. For a detailed description of all the options, check [here](https://www.typescriptlang.org/docs/handbook/tsconfig-json.html).