JSFiddle - React, Tailwind, and code Playground

[ASSIGNMENT] Close Frontend Application Quiz

by brombomb

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 {
  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);
}

.List__item--selected {
  border-radius: 100%;
  text-decoration: underline;
  font-weight: bold;
}

.selectedItems {
  background-color: #fcccfc;
  padding: 10px;
  margin: 10px;
  color: #333;
}

/* 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 } = 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. Currently selected items should be visually highlighted.
// 4. Currently selected items' names should be shown at the top of the page.
// 5. Make sure to avoid unnecessary re-renders.

const selected = []

const handleClick = ( item, selected ) => {
	const index = selected.indexOf(item.name)
  if( index === -1) {
  	selected.push(item.name)
  } else {
  	selected.splice(index, 1)
  }
 console.log(selected)
}

const List = ({ items }) => (
  <Fragment>
    <div className="selectedItems"> Selected: {selected } </div>
    <ul className="List">
      {items.map(item => (
        <li 
          key={item.name} 
          className={`List__item List__item--${item.color} ${selected.indexOf(item.name) !== -1 ? 'List__item--selected' : 'not'}`} 
          onClick={() => { handleClick(item, selected)}} 
        >
          {selected.indexOf(item.name)}
          {item.name}
        </li>
      ))}
    </ul>
  </Fragment>
);

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

const sizes = ['tiny', 'small', 'medium', 'large', 'huge'];
const colors = ['navy', 'blue', 'aqua', 'teal', 'olive', 'green', 'lime', 'yellow', 'orange', 'red', 'maroon', 'fuchsia', 'purple', 'silver', 'gray', 'black'];
const fruits = ['apple', 'banana', 'watermelon', 'orange', 'peach', 'tangerine', 'pear', 'kiwi', 'mango', 'pineapple'];

const items = sizes.reduce(
  (items, size) => [
    ...items,
    ...fruits.reduce(
      (acc, fruit) => [
        ...acc,
        ...colors.reduce(
          (acc, color) => [
            ...acc,
            {
              name: `${size} ${color} ${fruit}`,
              color,
            },
          ],
          [],
        ),
      ],
      [],
    ),
  ],
 ...