Web Develpers era

React -1 ( react with ravenndra kanchi)

react with tool chanis

45 to 50 sessions core

after 50 sessions -> some tooll chains

react with type script

mern stackaplication

in this course it has 17 and 18

additional libraries and tool chanins

we will discuss everytopic of react

routing, hooks, api calls

and advncaced topics

what i sreact and why we need react

what are the challenges in modern web development

react becomes more popular from 214

before that there is no internet

there is no website

netflix is designed with react

amazon is designed with react

why react is trending from 2014

from 1999 we have browser

we hve web applicaitons

why suddenly trending from 2014

modern web userrs are using we from smart devices

80 percent users from mobile only right from smart devices only like tab

earlier u hve to vicist a net cafe , u need to pay hourly 10 rupes

becuase this less traffic earlier

we need unified user experience

for example we have youtube

watchignthis on pc or tab

diferetn devices diferent dimensions

we have to optiomise size to fit on mobile ( compress previosuly)

m.facebook.com, diferent devices diffent domains

when application is optimisd, mobile users unable to certain facility

u have ms office in ur lappy and in mobile

mobile in ms ffice -> severla options is not avaialble

when watching from mboile -> restrictting some acces

that is not good

now mobile has same experince like all devices

unified expericne -> in all devices all options avaialble

===

unified ux

====

fluid user expericnce

iam using google

imaging this on mobile

some list came after browsing

in that pagination -> iam scrolling down to reach so amny pages

if this watch on mobile -> it is very small, how to click on that small siz e

zoom and click

-> that ui developed font and sizes based on the mobile

every one can see

not zoom and click

=> in images, auto images loading

==>

to developing like this it is more difficult

==>

these are challenges

===>

loosely coupled and extensible

one new feature is created,

sepertely developed after all tetings

new feature developed , to integrate it into production app

customer will have to reinstall the application

its not good

automaticlly comes

catastropic falures -> it cannot integrate that new feature

aftre installing software -> in os, os gets technical issues

that should not happen

====

without stopping the application -> new features have to integrate -> loosely coupled and extensible architecture

===

what is a solution for ths

as a developer what is the solutiin

- better to build spa -> single page applicaitons

what is isngle page applications have unified expericne

spa has fluid experence

spa has loosley coupled and extensible

difference between ordinar y and spa

index page

=> login. register

=> click on login -> redirect to some other page

its not another page in spa

===

component level develop is goo d

node set up

codesand box is not used for porfessional projects

install node js

create a new project

build a project

===

node -v

16.13.0 or some other version

what wer the usestate functions

state is like a variabvle in react

it is used to store data that changes over time

whenever state changes, react automatically update content on the screen

===

in the translate

three steps

one step take input from user

process that input

shown result

how the translation happens

using google translate api

this translation will ping google api once response got i twill return that respons e

How does react project starts

in react project

all projects bundled into a single file and then placed into server

npm run build

app.js, index.js, filed.js translate.js ==> bundle.js

also called as app.bunlde its called some identifier.js

every react project is meant to develop html

server request , in response it load html page and taht will be showin in ui

if need links or some other omponnetn

that hetml page tells fetch from server

so the browser send a second request to server

and give thebundle file to browser

public /index.html

src/index.js

index.html id ==root

in index.js id == root

which ide is related that id onl y it wille xecutes

index.js

i tis the first file executed in react

===

bundle.js

====

when index.html started loaded on the browser

inside the bundele it has index,hs

index.html root had indcated in bundle,js root

bundle.js telling it has root id , we have to access root id in index.html

what react doing

react displays html

changes taht html when the user does something

wrtite html in js is called jsx

iam showing jsx on the reight side of the screen

function taht return jsxd ( html inside js ) callead as react component

functioin hat return signle project can have so many diferent components inside of it

app.js is front face

it calls one component it calls one compoennt it calls another compoinent finaly it results it forwards to parent and it forwards to parent

each individual component is in charge of displaying content for a certain portion of application

we can wrtite in two ways

write react to create a normal html element

write react to show another component

write another componetn in app component

===

process the cod eand showi in html

first call app.js and then its call remmaining compoinents which sahared with app. js

staep by step calling

call div

then h1 then call contactlist app

questions

so whats react all about ?

react can develop interactive websites, what it will do is

it can take user actions based otn that process html

each indivudal component is used to create a protion of the applicaiton

differnece between plaiun htm and componetn is

plain html starts with small letters

components starts with capital case

======

question

Imagine you are working on a project with two React components. Here is the code for each:

App.js

function App() {
  return (
    <div>
      <h1>Cake Recipe</h1>
      <Recipe />
    </div>
  );
}

Recipe.js

function Recipe() {
  return (
    <ul>
      <li>100g Sugar</li>
      <li>200g Flour</li>
      <li>500ml Water</li>
    </ul>
  )
}
 <div>
      <h1>Cake Recipe</h1>
 <ul>
      <li>100g Sugar</li>
      <li>200g Flour</li>
      <li>500ml Water</li>
    </ul>

</div>

If React tried to show the App component (the code in the App.js file), what would the final HTML displayed on the screen probably look like?

=====

how does a react app start up

npm run build

it getnerates html file and bundled js

if user

what were the usestate functions

how did the text get translated to another language

react -1

https://www.udemy.com/course/react-redux/learn/lecture/12531044#overview\

@ste_grider

ste.grider@gmail.com

https://discord.gg/h2G3CbxPZA

https://www.drawio.com/

- automatically by https://prettier.io/

https://www.diffchecker.com/

Inside my terminal, I run the shell https://github.com/robbyrussell/oh-my-zsh with the default theme 'Robby Russell'

write code , work on projects

===

entire language translation app in this tutorails

very small react application transaltion app

===

user enters keyword

select languagte

it will convert to output

https://codesandbox.io/s/react-pibc94

completed code

https://codesandbox.io/p/sandbox/react-forked-m5bz37

===

if u change the code immeediately i twill reflect in browser

local

impport

create variable susing starte

in return

write html

server laravel application

asset_url = domain/public

chmod -R 755 public/admin/

composer dump-autoload

get the application from hostinger

Image upload in laravel

 if($images !== null) {
            $images_array=[];
            foreach ($images as $image) {
                $data=ImageUpload::instance()->uploadImage($image,'aboutpage');
                array_push($images_array,$data);
            }
            $input['image']=json_encode($images_array);
         
            
        }
        if($b_images !== null) {
            $input['banner_two_image']=ImageUpload::instance()->uploadImage($b_images,'aboutpage');
            
            
        }
        $images = $request->file('image');
        <?php
namespace App\Helpers;
use Illuminate\Support\Facades\Storage;

class ImageUpload
{
      

     public function uploadImage($requested_image,$location)
     {
            $storage_dir = 'images/'.$location;
            $storage_path = Storage::disk('public')->path($storage_dir);
            $filename = time() . '_banner_' . str_replace(' ', '-', strtolower($requested_image->getClientOriginalName()));
            $requested_image->move($storage_path,  $filename);
            $storage_path = 'storage/' . $storage_dir . '/' . $filename;
        
            return $storage_path;
        
     }

     public static function instance()
     {
         return new ImageUpload();
     }
}

<div class="form-group"><strong>image:</strong>{!! Form::file('image[]', array('multiple'=>true,'accept'=>'image/png, image/gif, image/jpeg','value'=>'{{$data->image}}','placeholder' => 'image','class' => 'form-control')) !!}</div>
                                                @foreach (json_decode($data->image) as $image)

                                                    <img style="width:100px;height:100px;" src="{{asset($image)}}" alt="11.jpg">

                                                @endforeach

                                                <div class="form-group"><strong>banner_image:</strong>{!! Form::file('banner_image', array('value'=>'{{$data->banner_image}}', 'accept'=>'image/png, image/gif, image/jpeg','placeholder' => 'banner_two_image','class' => 'form-control')) !!}</div>
                                                <img style="width:100px;height:100px;" src="{{asset($data->banner_image)}}" alt="11.jpg">
                                            

Event listening in react

How we can listen to som eevents

some envents fire like click or automatically

user enters into input button , that is event

on word type it is event

responseive

reactive

interactive

flexible

React add new template part 2

must have one parent ellement

     <div>
            <h1>First Component</h1>
            <p>This is the first component</p>
        </div>

import React, { useState } from 'react';
function First(){
   
    return (        
        <div>
            <h1>First Component</h1>
            <p>This is the first component</p>
        </div>
    )
}

export default First;