Close Frontend Application Quiz (Fork)

[ASSIGNMENT] Close Frontend Application Quiz

by Lisa French

HTML

<script src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
<div id="root"></div>

CSS

.List__item {
  /* Cursor added for easier-to-understand UI */
  cursor: pointer;
}

.selected-item {
  border: 5px solid yellow;
}
 
 /* Unchanged below */


.List {
  margin: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  grid-auto-rows: 60px;
  grid-gap: 16px;
}

.List__item {
  line-height: 60px;
  text-align: center;
  color: white;
  text-shadow: 1px 1px rgba(0, 0, 0, 0.5);
  box-shadow: 0px 1px 1px 0px rgba(0, 0, 0, 0.05);
}

/* Taken from https://clrs.cc/ */

.List__item--navy {
  background-color: #001f3f;
}

.List__item--blue {
  background-color: #0074d9;
}

.List__item--aqua {
  background-color: #7fdbff;
}

.List__item--teal {
  background-color: #39cccc;
}

.List__item--olive {
  background-color: #3d9970;
}

.List__item--green {
  background-color: #2ecc40;
}

.List__item--lime {
  background-color: #01ff70;
}

.List__item--yellow {
  background-color: #ffdc00;
}

.List__item--orange {
  background-color: #ff851b;
}

.List__item--red {
  background-color: #ff4136;
}

.List__item--maroon {
  background-color: #85144b;
}

.List__item--fuchsia {
  background-color: #f012be;
}

.List__item--purple {
  background-color: #b10dc9;
}

.List__item--black {
  background-color: #111111;
}

.List__item--gray {
  background-color: #aaaaaa;
}

.List__item--silver {
  background-color: #dddddd;
}

React

const { Fragment, useState } = React;
/* import React, { useState } from 'react'; */
/* import { useState } from "react"; */


// Implement a feature to allow item selection with the following requirements:
// 1. Clicking an item selects/unselects it.
// 2. Multiple items can be selected at a time.
// 3. Make sure to avoid unnecessary re-renders of each list item in the big list (performance).
// 4. Currently selected items should be visually highlighted.
// 5. Currently selected items' names should be shown at the top of the page.
//
// Feel free to change the component structure at will.

const ListItem = (item) => {

// let itemsSelected = useState(false);
// let itemsSelected = false;

// useState is a Hook, so you can only call it at the top level of your component or your own Hooks. You can’t call it inside loops or conditions. If you need that, extract a new component and move the state into it.

const [itemSelected, setItemSelected ] = useState(false);

const handleSelection = (item) => {
	itemsSelected = false ? itemsSelected = true : itemsSelected = false;
  console.log("CLICKED!")
}

const classNames = itemsSelected ? 
`List__item List__item--${item.color} selected-item` :
`List__item List__item--${item.color}`;

return (
        <li
          key={item.name} 
          className={classNames}
          onClick={handleSelection}
          selected={itemsSelected}
        >
          {item.name}
        </li>
	)
}

const List = ({ items }) => (
  <Fragment>
    <ul className="List">
      {items.map(item => (
<ListItem {...item} key={item.name}>
        {item.name}
      </ListItem>
/*         <li
          key={item.name} 
          className={`List__item List__item--${item.color}`}
          selected={false}
        >
          {item.name}
        </li> */
      ))}
    </ul>
  </Fragment>
);

// ---------------------------------------
// Do NOT change anything below this line.
// ---------------------------------------

const sizes = ['tiny', 'small',...