Daily React – 2: State Sharing

I have a story to tell but the story is different each time I am in a different universe. So, I want to show audiences those stories whenever they travel through different universes. For example, the story in finite vector space will be a little bit di…

I have a story to tell but the story is different each time I am in a different universe. So, I want to show audiences those stories whenever they travel through different universes. For example, the story in finite vector space will be a little bit different from inifinite vector space. In another example, Disney world will have different themes and rides from Universal Studios.

My story is different a set of math universes that are rather focused on the different math textbooks and different proofs that each textbook brings in each book. So, I need to control the title of the book state and the axioms in each book state. I wanted to sync it and here it is how I did it.

Collection of Components

import React, { useState } from "react";
import Hookers from "./Hookers";
import Statements from "./Statements";

const data = [
    {
        title: "Calculus by Michael Spivak",
        statements: [
            { id: 1, statement: "square root of two is irrational" },
            { id: 2, statement: "there are infinite number of prime numbers" },
            { id: 3, statement: "y=x^2 is a continuous at 0" },
            { id: 4, statement: "e is irrational" },
            { id: 5, statement: "pi is irrational" },
        ],
    },
    { title: "Linear Algebra by Stephen Friedberg", statements: [] },
    {
        title: "Contemporary Abstract Algebra by Joseph Gallian",
        statements: [],
    },
];

function Components() {
    const [repo, setRepo] = useState(data[0]);

    const handleClick = () => {
        if (repo.title === data[0].title) {
            setRepo(data[1]);
        } else if (repo.title === data[1].title) {
            setRepo(data[2]);
        } else {
            setRepo(data[0]);
        }
    };
    console.log(repo);
    return (
        <>
            <div className="header">
                <Hookers title={repo.title} handleClick={handleClick} />
            </div>
            <div className="mainbody">
                <Statements statements={repo.statements} />
            </div>
        </>
    );
}

export default Components;

Hookers Components

import React from "react";

const Hookers = (props) => {
    return (
        <>
            <div className="title">
                <h1>{props.title}</h1>
            </div>
            <button className="btn" onClick={props.handleClick}>
                CLICK
            </button>
        </>
    );
};

export default Hookers;

Statements Component

import React, { useState, useEffect } from "react";

const Statements = (props) => {
    const [axioms, setAxioms] = useState(props.statements);

    useEffect(() => {
        setAxioms(props.statements);
    }, [props.statements]);

    const removeItem = (id) => {
        let unremovedItem = axioms.filter((sentence) => {
            return sentence.id !== id;
        });
        setAxioms(unremovedItem);
    };

    return (
        <>
            <ol>
                {axioms.map((sentence) => {
                    const { id, statement } = sentence;
                    return (
                        <li key={id} className="sentences">
                            <p>
                                <strong>{statement}</strong>
                            </p>
                            <button>EDIT</button>
                            <button onClick={() => removeItem(id)}>
                                REMOVE
                            </button>
                        </li>
                    );
                })}
            </ol>
            <div className="form">
                <input type="text" name="axiom" id="" />
                <button>ADD</button>
            </div>
        </>
    );
};

export default Statements;

howthisworks


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