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redux 를 사용하지 않은 react.js 의 TO-DO CRUD 구현

 

C:\SourceSample>npm install -g create-react-app

C:\SourceSample>create-react-app my-app

C:\SourceSample>cd my-app
C:\SourceSample\my-app>yarn start

 

 

 

 

App.js

import React from "react";
import "./App.css";
import TransactionList from "./components/TransactionList";

function App() {
  return <TransactionList />;
}

export default App;

 

components > TransactionForm.js

import React, { Component } from "react";

class TransactionForm extends Component {
  state = {
    ...this.returnStateObject(),
  };

  returnStateObject() {
    if (this.props.currentIndex === -1)
      return {
        bAccountNo: "",
        iFSC: "",
        bName: "",
        amount: "",
      };
    else return this.props.list[this.props.currentIndex];
  }

  componentDidUpdate(prevProps) {
    if (
      prevProps.currentIndex !== this.props.currentIndex ||
      prevProps.list !== this.props.list
    ) {
      this.setState({ ...this.returnStateObject() });
      console.log(prevProps, this.props);
    }
  }

  handleInputChange = (e) => {
    this.setState({
      [e.target.name]: e.target.value,
    });
  };

  handleSubmit = (e) => {
    e.preventDefault();
    this.props.onAddOrEdit(this.state);
  };

  render() {
    return (
      <form onSubmit={this.handleSubmit} autoComplete="off">
        <input
          name="bAccountNo"
          placeholder="Account Number"
          onChange={this.handleInputChange}
          value={this.state.bAccountNo}
        />
        <br />
        <input
          name="iFSC"
          placeholder="IFSC"
          onChange={this.handleInputChange}
          value={this.state.iFSC}
        />
        <br />
        <input
          name="bName"
          placeholder="A/C Holder Name"
          onChange={this.handleInputChange}
          value={this.state.bName}
        />
        <br />
        <input
          name="amount"
          placeholder="Amount"
          onChange={this.handleInputChange}
          value={this.state.amount}
        />
        <br />
        <button type="submit">Submit</button>
      </form>
    );
  }
}

export default TransactionForm;

 

components > TransactionList.js

import React, { Component } from 'react'
import TransactionForm from './TransactionForm'

class TransactionList extends Component {
    state = {
        currentIndex: -1,
        list: this.returnList()
    }

    returnList() {
        if (localStorage.getItem('transactions') == null)
            localStorage.setItem('transactions', JSON.stringify([]))
        return JSON.parse(localStorage.getItem('transactions'))
    }

    handleEdit = (index) => {
        this.setState({
            currentIndex: index
        })
    }

    handleDelete = (index) => {
        var list = this.returnList()
        list.splice(index, 1);
        localStorage.setItem('transactions', JSON.stringify(list))
        this.setState({ list, currentIndex: -1 })
    }

    onAddOrEdit = (data) => {
        var list = this.returnList()
        if (this.state.currentIndex === -1)
            list.push(data)
        else
            list[this.state.currentIndex] = data
        localStorage.setItem('transactions', JSON.stringify(list))
        this.setState({ list, currentIndex: -1 })
    }


    render() {
        return (
            <div>
                <TransactionForm
                    currentIndex={this.state.currentIndex}
                    list={this.state.list}
                    onAddOrEdit={this.onAddOrEdit}
                />
                <hr />
                <table>
                    <tbody>
                        {this.state.list.map((item, index) => {
                            return <tr key={index}>
                                <td>{item.bAccountNo}</td>
                                <td>{item.bName}</td>
                                <td>{item.amount}</td>
                                <td><button onClick={() => this.handleEdit(index)}>Edit</button></td>
                                <td><button onClick={() => this.handleDelete(index)}>Delete</button></td>
                            </tr>
                        })}
                    </tbody>
                </table>
            </div>
        )
    }
}

export default TransactionList

 

index.css

body {
  margin: auto;
  width: 50%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
    "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 1.5rem;
}
input,
button {
  font-size: 1.5rem;
}
code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New",
    monospace;
}

table,
th,
td {
  border: 1px solid black;
  border-collapse: collapse;
}
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