React.js ライブラリ「react-select-search」を使って軽量の選択式のコンポーネントを利用する

create-react-app react-app

## 作成したプロジェクトに移動
cd react-app
 
## インストール
npm install react-select-search

import React from 'react';
import SelectSearch from 'react-select-search';
import './style.css';

const Sample = () => {

  const options = [
    {name: 'Swedish', value: 'sv'},
    {name: 'English', value: 'en'},
    {
        type: 'group',
        name: 'Group name',
        items: [
            {name: 'Spanish', value: 'es'},
        ]
    },
  ];
  return (    
    <div>
      <SelectSearch options={options} value="sv" name="language" placeholder="Choose your language" />
    </div>
  );
}

export default Sample;

html,
body,
#root {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  background-color: white;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, avenir next, avenir, helvetica neue, helvetica, ubuntu,
    roboto, noto, segoe ui, arial, sans-serif;
  background: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  cursor: default;
}

#root {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #f0f0f0;
}

.card {
  width: 45ch;
  height: 45ch;
  background: grey;
  border-radius: 5px;
  background-image: url(https://cdn.pixabay.com/photo/2020/03/03/15/47/landscape-4899037_1280.jpg);
  background-size: cover;
  background-position: center center;
  box-shadow: 0px 10px 30px -5px rgba(0, 0, 0, 0.3);
  transition: box-shadow 0.5s;
  will-change: transform;
  border: 15px solid white;
}

.card:hover {
  box-shadow: 0px 30px 100px -10px rgba(0, 0, 0, 0.4);
}
.select-search {
  width: 300px;
  position: relative;
  font-family: 'Nunito Sans', sans-serif;
  box-sizing: border-box;
}

.select-search *,
.select-search *::after,
.select-search *::before {
  box-sizing: inherit;
}

/**
* Value wrapper
*/
.select-search__value {
  position: relative;
  z-index: 1;
}

.select-search__value::after {
  content: '';
  display: inline-block;
  position: absolute;
  top: calc(50% - 9px);
  right: 19px;
  width: 11px;
  height: 11px;
}

/**
* Input
*/
.select-search__input {
  display: block;
  height: 36px;
  width: 100%;
  padding: 0 16px;
  background: #fff;
  border: 1px solid transparent;
  box-shadow: 0 .0625rem .125rem rgba(0, 0, 0, 0.15);
  border-radius: 3px;
  outline: none;
  font-family: 'Noto Sans', sans-serif;
  font-size: 14px;
  text-align: left;
  text-overflow: ellipsis;
  line-height: 36px;
  -webkit-appearance: none;
}

.select-search__input::-webkit-search-decoration,
.select-search__input::-webkit-search-cancel-button,
.select-search__input::-webkit-search-results-button,
.select-search__input::-webkit-search-results-decoration {
  -webkit-appearance:none;
}

.select-search__input:not([readonly]):focus {
  cursor: initial;
}

/**
* Options wrapper
*/
.select-search__select {
  background: #fff;
  box-shadow: 0 .0625rem .125rem rgba(0, 0, 0, 0.15);
}

/**
* Options
*/
.select-search__options {
  list-style: none;
}

/**
* Option row
*/
.select-search__row:not(:first-child) {
  border-top: 1px solid #eee;
}

/**
* Option
*/
.select-search__option {
  display: block;
  height: 36px;
  width: 100%;
  padding: 0 16px;
  background: #fff;
  border: none;
  outline: none;
  font-family: 'Noto Sans', sans-serif;
  font-size: 14px;
  text-align: left;
  cursor: pointer;
}

.select-search--multiple .select-search__option {
  height: 48px;
}

.select-search__option.is-selected {
  background: #2FCC8B;
  color: #fff;
}

.select-search__option.is-highlighted,
.select-search__option:not(.is-selected):hover {
  background: rgba(47, 204, 139, 0.1);
}

.select-search__option.is-highlighted.is-selected,
.select-search__option.is-selected:hover {
  background: #2eb378;
  color: #fff;
}

/**
* Group
*/
.select-search__group-header {
  font-size: 10px;
  text-transform: uppercase;
  background: #eee;
  padding: 8px 16px;
}

/**
* States
*/
.select-search.is-disabled {
  opacity: 0.5;
}

.select-search.is-loading .select-search__value::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='50' height='50' viewBox='0 0 50 50'%3E%3Cpath fill='%232F2D37' d='M25,5A20.14,20.14,0,0,1,45,22.88a2.51,2.51,0,0,0,2.49,2.26h0A2.52,2.52,0,0,0,50,22.33a25.14,25.14,0,0,0-50,0,2.52,2.52,0,0,0,2.5,2.81h0A2.51,2.51,0,0,0,5,22.88,20.14,20.14,0,0,1,25,5Z'%3E%3CanimateTransform attributeName='transform' type='rotate' from='0 25 25' to='360 25 25' dur='0.6s' repeatCount='indefinite'/%3E%3C/path%3E%3C/svg%3E");
  background-size: 11px;
}

.select-search:not(.is-disabled) .select-search__input {
  cursor: pointer;
}

/**
* Modifiers
*/
.select-search--multiple {
  border-radius: 3px;
  overflow: hidden;
}

.select-search:not(.is-loading):not(.select-search--multiple) .select-search__value::after {
  transform: rotate(45deg);
  border-right: 1px solid #000;
  border-bottom: 1px solid #000;
  pointer-events: none;
}

.select-search--multiple .select-search__input {
  cursor: initial;
}

.select-search--multiple .select-search__input {
  border-radius: 3px 3px 0 0;
}

.select-search--multiple:not(.select-search--search) .select-search__input {
  cursor: default;
}

.select-search:not(.select-search--multiple) .select-search__input:hover {
  border-color: #2FCC8B;
}


.select-search:not(.select-search--multiple) .select-search__select {
  position: absolute;
  z-index: 2;
  top: 44px;
  right: 0;
  left: 0;
  border-radius: 3px;
  overflow: auto;
  max-height: 360px;
}

.select-search--multiple .select-search__select {
  position: relative;
  overflow: auto;
  max-height: 260px;
  border-top: 1px solid #eee;
  border-radius: 0 0 3px 3px;
}

import React from 'react';
import Sample from './sample';
import './App.css';

function App() {
  const style = {
    width: "50%",
    margin: "0 auto",
    marginTop: 150,
  };
  return (
    <div className="App">
      <div style={style}>
        <Sample />
      </div>
    </div>
  );
}

export default App;

npm start