I'm absolutely sure, that I'm asking a silly question, but I really do not understand how this line of code works
import React from 'react';
My question: who and where searches for 'react'
name?
For example, this site tells me, that for module-name
I should use relative of absolute path, eg
import React from './react';
or
import React from '/home/user/react';
I thought that 'react'
is same as './react'
but I've created ReactJS applcation via create-react-app
command and didn't find any file named react.js
in application folder.
So, obviously there is some tool or rule by which module name has been resolved to a proper file, but I cannot find proper documentation about this.
Import statements are importing packages by name from the node_modules
directory in your app , which is where they're saved when you run an installation command such as npm install
or yarn
inside your app.
When you write:
import React from 'react';
As far as you're concerned, it's as if you'd written:
import React from './node_modules/react/index.js';
Importing by package name means you don't have to be aware of how a given package is structured or where your node_modules
directory is relative to your javascript file.
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