So I'm new in ReactJS and wants to learn a couple of small things, and here is one. I wrote an import code on App.js like this:
import React, { Component } from 'react';
import './App.css';
import Axios from 'axios';
import Load from './Loading.js';
I created a custom file for a loading animation and it's imported from import Load from './Loading.js'
the './Loading.js' is the file name and location, and the Load is a const that is exported from the Loading.js file
So my question is, if the Load is a const that I've been exported on the js file I've wrote, then where is the { Component } from 'react' is located? I was trying to find it on the node_modules folder but got no clue. even the react.js file that I thought it was on the node_modules/react folder, I couldn't find it
Thank you before!
Component is declared inside react library, it's located inside the node_modules inside react's folder (maybe it's hard to find because the files are minified and packed) if you are using VsCode, you can click on the component and where the cursor is pointing on it then press F12 it will redirect you to the file where it's exactly declared.
Related
I'm trying to build a file template for a react component for my team at work.
I have built the file template according to what Intellij offers, but I get stuck in one thing:
How can I import files into my file template, but without knowing where I am regarding the root folder?
We do use absolute imports so I do use it inside my component file, but it doesn't work in my test file and I have something that calls AppMock that mocks the behavior of our app, and I can't import absolute on it.
Any solutions will be welcomed, thanks
I tried to look for import files relatively in my file template but I couldn't find anything that matches to my problem
Here is an example of what I talk about:
import { render, screen } from '#testing-library/react';
import user from '#testing-library/user-event';
import React from 'react';
import { $NAME } from './${NAME}';
import { noop } from 'lodash'
import { AppMock } from '../../../../../../config/jest/testHelpers/AppMock';
As you can see, the imports are external libraries, except AppMock because we don't work with absolute imports in test files, and because of that I didn't find a way to create a file template for test file.
I'm trying to use the select input tool for ReactJS (https://react-select.com/home#getting-started) so I can have a filter/search bar on my website. I copied and pasted the code from the link above into a new file in my src folder. At this point I had no errors, but when I import this filter file into my App.js file and run it, I get the following error:
Module not found: You attempted to import ../data which falls outside of the project src/ directory. Relative imports outside of src/ are not supported.
Here are the imports for the filter file:
import React, { Component, Fragment } from 'react';
import Select from 'react-select';
import { colourOptions } from '../data';
import { Note } from '../styled-components';
The rest of the code is in the link above (I used the Single search, the first one that comes up). I've looked up several things and can't seem to figure out how to get rid of this error!
[EDIT] I don't even know where this data file is in my project or my computer. I've searched for it and I have a million data files, so I'm unsure of what to bring into my src folder. I'm also having the same problem with the styled-components import. When I search for that on my computer, nothing comes up.
import { colourOptions } from '../data';
The above import seems to be incorrect. You might have want to import the from the data.js which is in the same directory as of your App.js.
import { colourOptions } from './data';
This can help you solve the error. Also make sure the data.js file is in the same directory as of App.js.
I have seen that it is used
import React from 'react';
import './cssName.css';
but it does not work for me, I am working on the electron app and add react as shown here
https://reactjs.org/docs/add-react-to-a-website.html
It is not working because you do not have a build process set up. You will need to setup webpack or something like that to be able to import css.
I suggest you read this article: https://flaviocopes.com/react-electron/.
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, e.g
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.
I have a files structure issue that I am trying to fix when referencing components into other components as imports.
The current files setup I have looks like this...
I am working on the file called security_passphrase.vue and within that file I reference 2 files to import as I need to use them there.
import dropdown from '../components/vue_form/dropdown.vue'
import formbutton from '../components/vue_form/form_button.vue'
The compiler cannot find the modules I am trying to load.
Error: Cannot find module '../../components/vue_form/dropdown.vue' from 'C:\wamp64\www\merchant-backend-new\merchant-backend\resources\assets\js\components\vue_form\concertina_form'
Error: Cannot find module '../../components/vue_form/form_button.vue'
from
'C:\wamp64\www\merchant-backend-new\merchant-backend\resources\assets\js\components\vue_form\concertina_form'
I have tried different ways to make this work but no success. The files I am trying to import are outside of the folder where the file is I am working with.
/concertina_form/security_passphrase.vue /vue_form/form_button.vue
/vue_form/dropdown.vue
Help will be great :)
import dropdown from '../dropdown.vue'
import formbutton from '../form_button.vue'
Should be the correct way to import these files, using ../ goes down one directory which will take you from the concertina_form directory to the vue_form directory.