npm still compile while typing

Please can you clarify what you mean by npm compiling? Do you have TypeScript compiler enabled (Settings | Languages & Frameworks | TypeScript, Enable TypeScript Compiler)?

Thanks for your comment!

"npm compiling"? I mean that npm builds the code I had just written and deploys it immediatly (I think it's called "hot swap"). At that time I had enabled Typescript compiler, and especially check Track changes option bellow.

And now I uncheck that option, I realize that IDE just compile my code when I press Ctrl+S or unactive IDE's window. However, I'm still not sure about my trick. If you know exactly why, and how to config IDE to make it compile new code only when I press Ctrl+S or unactive it's window then please tell me about that.

Thank you so much! And sorry about my bad English :).

>I mean that npm builds the code I had just written and deploys it immediatly (I think it's called "hot swap")

npm itself can hardly build anything:) You must be using some build tools started with npm scripts, right?

>At that time I had enabled Typescript compiler, and especially check Track changes option bellow.

Built-in TypeScript compiler can't be run on Save; if Track changes option is enabled, it's triggered while you edit your code; if it's off, you need to run compiler explicitly using Compile button in Typescript tool window

> If you know exactly why, and how to config IDE to make it compile new code only when I press Ctrl+S or unactive it's window then please tell me about that.

You can set up your build tool to watch your files (most built tools/bundlers, like gulp, Gryunt, Webpack, ... support watch mode) and then hit Ctrl+S in WebStorm to trigger your build tool

Thanks Elena Pogorelova for your detailed answer!