HTML5在线算24小游戏

使用右上角的数字和允许的操作符输入计算公式，得出24的结果。小时候的算24经典小游戏。

html5, game, math

《aframe.js 3d拼图代码详解》作品已被踏得网收录！

第三方库
作品简介 1772
作品推荐
使用帮助
常用链接

HTML
CSS
JavaScript
Result

编译

JavaScript

function _eval(e) {
  // divides context
  return eval(e)
} +
(function() {
  function $(selector) {
    return document.querySelector(selector)
  }

function $$(selector) {
    return document.querySelectorAll(selector)
  }
  const $expr = $('#expr')
  const $result = $('#result')
  const $solution = $('#solution')
  const $stats = $('#stats')
  const $digits = $$('#digits li')
  const $rules = $$('#rules li')

function showStats() {
    $('#won').innerHTML = localStorage.won
    $('#total').innerHTML = localStorage.total
    $('#average-length').innerHTML = (+localStorage.averageLength).toFixed(3)
  }

function removeOldDigits() {
    for (let i = 0; i < 4; i += 1) {
      while ($digits[i].children.length > 1) {
        $digits[i].removeChild($digits[i].children[0])
      }
    }
  }

function show() {
    for (let i = 0; i < 4; i += 1) {
      const digit = document.createElement('div')
      digit.className = `style-${Math.floor(Math.random() * 4)}`
      digit.innerHTML = localStorage.digits[i]
      $digits[i].className = `animation-${Math.floor(Math.random() * 6)}`
      $digits[i].appendChild(digit)
    }
    setTimeout(removeOldDigits, 1250)

showStats()
  }

function refresh() {
    localStorage.digits = (`${Math.random()}`).substr(2, 4)
    show()

$expr.value = ''
    $expr.removeAttribute('disabled')
    $expr.focus()
  }

function success() {
    localStorage.averageLength =
      ((localStorage.averageLength * localStorage.won) + $expr.value.length) / (+localStorage.won + 1)
    localStorage.won = +localStorage.won + 1
    localStorage.total = +localStorage.total + 1

$result.className = 'animate'
    $solution.className = 'animate'
    $solution.innerHTML = ` = ${$expr.value}`
    $expr.setAttribute('disabled', '')
    setTimeout(() => {
      showStats()
      $stats.className = 'hover'
    }, 250)
    setTimeout(() => {
      $stats.className = ''
    }, 1750)
    setTimeout(() => {
      $result.className = ''
      $result.innerHTML = ''
      refresh()
    }, 2250)
    setTimeout(() => {
      $solution.className = ''
      $solution.innerHTML = ''
    }, 2500)
  }

function check(result) {
    const expr = $expr.value
    let e = expr
      .replace(/(\d|\))-/g, /$1/)
      .replace(/&&|\|\|/g, '#')
      .replace(/>>|<<|[+*/%~^&|()]/g, '')
      .replace(/0x|0o/ig, '0')
    let digitsAppeared = 0
    for (let i = 0; i < 4; i += 1) {
      if (e.match(localStorage.digits[i])) {
        e = e.replace(localStorage.digits[i], '')
        digitsAppeared += 1
      }
    }
    let valid = true
    if (result !== 24) {
      $rules[1].className = 'bad'
      valid = false
    }
    if (digitsAppeared !== 4 || e.match(/\d/)) {
      $rules[2].className = 'bad'
      e = e.replace(/\d/g, '')
      valid = false
    }
    if (e.match(/-/)) {
      $rules[4].className = 'bad'
      e = e.replace(/-/g, '')
      valid = false
    }
    if (e) {
      $rules[3].className = 'bad'
      valid = false
    }
    if (valid) {
      success()
    }
  }

localStorage.won = localStorage.won || 0
  localStorage.total = localStorage.total || 0
  localStorage.averageLength = localStorage.averageLength || 0
  localStorage.digits = localStorage.digits || (`${Math.random()}`).substr(2, 4)

setInterval(() => {
    $expr.placeholder = document.activeElement === $expr || $expr.placeholder ?
      '' : '█'
  }, 500)
  show()

$expr.addEventListener('keydown', (e) => {
    if (e.keyCode === 32) {
      e.preventDefault()
    }
  })

$expr.addEventListener('focus', () => {
    $expr.placeholder = ''
  })

$expr.addEventListener('input', () => {
    const oldValue = $expr.value
    const expr = $expr.value.replace(/\s/g, '')
    if (oldValue !== expr) {
      $expr.value = expr
    }

for (let i = 0, l = $rules.length; i < l; i += 1) {
      $rules[i].className = ''
    }
    switch (expr.toLowerCase()) {
      case '':
        $result.innerHTML = ''
        return
      case 's':
        $result.innerHTML = '~ is useful'
        return
      case 'sk':
        $result.innerHTML = 'x&lt;&lt;y is x*2<sup>y</sup>'
        return
      case 'ski':
        $result.innerHTML = 'try & | ^'
        return
      case 'skip':
        localStorage.total = +localStorage.total + 1
        refresh()
        $stats.className = 'hover'
        setTimeout(() => {
          $stats.className = ''
        }, 1500)
        $result.innerHTML = ''
        return
      default:
        try {
          const result = _eval($expr.value)
          if (result === null) {
            $result.innerHTML = 'null'
          } else {
            $result.innerHTML = result
          }
          check(result)
        } catch (e) {
          $result.innerHTML = expr
          $rules[0].className = 'bad'
        }
    }
  })

document.addEventListener('keydown', () => {
    $expr.focus()
  })
})()

编译

CSS

@import url(https://fonts.googleapis.com/css?family=Source+Sans+Pro:400,700);
::-moz-selection {
    background-color: transparent;
}
::selection {
    background-color: transparent;
}
body {
    font-family: "Source Sans Pro", sans-serif;
    margin: 0 auto;
    max-width: 960px;
    color: #373a33;
    position: relative;
    text-rendering: optimizeLegibility;
}
code {
    font-family: 'Fira Code', monospace;
}
header {
    font-size: 4rem;
    overflow: hidden;
}
@media (max-width: 520px) {
    header {
        font-size: 3rem;
    }
}
h1 {
    font-size: 1em;
    font-weight: bold;
    margin: 0;
    height: 1.5625em;
    position: relative;
    letter-spacing: -0.05em;
}
#js-background {
    position: absolute;
    width: 0;
    height: 1.5625em;
    background-color: #ffcd00;
    -webkit-animation: js-background 0.5s ease-in forwards;
    animation: js-background 0.5s ease-in forwards;
}
@-webkit-keyframes js-background {
    to {
        width: 1.5625em;
    }
}
@keyframes js-background {
    to {
        width: 1.5625em;
    }
}
#js {
    position: absolute;
    bottom: 0;
    left: 0.125em;
    color: #373a33;
    opacity: 0;
    -webkit-animation: js 0.75s 0.25s ease-in-out forwards;
    animation: js 0.75s 0.25s ease-in-out forwards;
}
@-webkit-keyframes js {
    to {
        left: 0.375em;
        opacity: 1;
    }
}
@keyframes js {
    to {
        left: 0.375em;
        opacity: 1;
    }
}
#twenty-four {
    position: absolute;
    left: 2em;
    bottom: 0;
    color: #ffcd00;
    white-space: nowrap;
    opacity: 0;
    -webkit-animation: twenty-four 0.75s 0.25s ease-in-out forwards;
    animation: twenty-four 0.75s 0.25s ease-in-out forwards;
}
@-webkit-keyframes twenty-four {
    to {
        left: 1.75em;
        opacity: 1;
    }
}
@keyframes twenty-four {
    to {
        left: 1.75em;
        opacity: 1;
    }
}
#result {
    position: absolute;
    left: 1.75em;
    bottom: 0;
    max-width: calc(100% - 3.5em);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 0.05em;
    box-sizing: border-box;
}
#result.animate {
    -webkit-animation: fade-out 0.5s 1.75s forwards;
    animation: fade-out 0.5s 1.75s forwards;
}
@-webkit-keyframes fade-out {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}
@keyframes fade-out {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}
#solution {
    opacity: 0;
    position: relative;
}
#solution::before {
    content: "";
    display: block;
    height: 100%;
    background-color: white;
    position: absolute;
    left: 0;
    top: 0;
}
#solution::after {
    content: "";
    display: block;
    height: 100%;
    background-color: white;
    position: absolute;
    width: 100%;
    top: 0;
    right: 0;
}
#solution.animate {
    opacity: 1;
    -webkit-animation: fade-out 0.5s 2s forwards;
    animation: fade-out 0.5s 2s forwards;
}
#solution.animate::before {
    -webkit-animation: slide-in 0.5s 2s forwards;
    animation: slide-in 0.5s 2s forwards;
}
#solution.animate::after {
    -webkit-animation: slide-out 0.5s 0.25s forwards;
    animation: slide-out 0.5s 0.25s forwards;
}
@-webkit-keyframes slide-in {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}
@keyframes slide-in {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}
@-webkit-keyframes slide-out {
    from {
        width: 100%;
    }
    to {
        width: 0;
    }
}
@keyframes slide-out {
    from {
        width: 100%;
    }
    to {
        width: 0;
    }
}
#stats {
    background-color: #ffcd00;
    width: 1.5625em;
    height: 1.5625em;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    -webkit-transition: opacity 0.5s;
    transition: opacity 0.5s;
}
#stats.hover,
#stats:hover {
    opacity: 1;
}
#stats td {
    text-transform: uppercase;
    vertical-align: top;
    font-size: 0.1875em;
    padding: 0 0.2em;
}
#stats td[id] {
    text-align: right;
    font-weight: bold;
}
#digits {
    margin: 0;
    padding: 0;
    width: 1.5625em;
    height: 1.5625em;
    position: absolute;
    top: 0;
    right: 0;
}
#digits li {
    margin: 0;
    padding: 0;
    list-style: none;
    width: 50%;
    height: 50%;
    text-align: center;
    font-size: 50%;
    line-height: 1.5625em;
    font-weight: bold;
    position: absolute;
    overflow: hidden;
}
#digits li:nth-child(1) {
    top: 0;
    left: 0;
}
#digits li:nth-child(2) {
    top: 0;
    left: 50%;
}
#digits li:nth-child(3) {
    top: 50%;
    left: 0;
}
#digits li:nth-child(4) {
    top: 50%;
    left: 50%;
}
#digits .style-0 {
    background: white;
    color: #373a33;
}
#digits .style-1 {
    background: #ffcd00;
    color: #373a33;
}
#digits .style-2 {
    background: #373a33;
    color: #ffcd00;
}
#digits .style-3 {
    background: #373a33;
    color: white;
}
#digits li > div {
    width: 100%;
    height: 100%;
    position: absolute;
}
#digits li.animation-0 > div:last-child {
    top: 0;
    left: 100%;
    -webkit-animation: animation-0 0.5s ease-out forwards;
    animation: animation-0 0.5s ease-out forwards;
}
#digits li.animation-1 > div:last-child {
    top: 0;
    left: -100%;
    -webkit-animation: animation-1 0.5s ease-out forwards;
    animation: animation-1 0.5s ease-out forwards;
}
#digits li.animation-2 > div:last-child {
    left: 0;
    top: 100%;
    -webkit-animation: animation-2 0.5s ease-out forwards;
    animation: animation-2 0.5s ease-out forwards;
}
#digits li.animation-3 > div:last-child {
    left: 0;
    top: -100%;
    -webkit-animation: animation-3 0.5s ease-out forwards;
    animation: animation-3 0.5s ease-out forwards;
}
#digits li.animation-4 > div {
    -webkit-transform: scaleX(1);
    transform: scaleX(1);
    -webkit-animation: animation-4-old 0.5s ease-in forwards;
    animation: animation-4-old 0.5s ease-in forwards;
}
#digits li.animation-4 > div:last-child {
    -webkit-transform: scaleX(0);
    transform: scaleX(0);
    -webkit-animation: animation-4 0.5s ease-out forwards;
    animation: animation-4 0.5s ease-out forwards;
}
#digits li.animation-5 > div {
    -webkit-transform: scaleY(1);
    transform: scaleY(1);
    -webkit-animation: animation-5-old 0.5s ease-in forwards;
    animation: animation-5-old 0.5s ease-in forwards;
}
#digits li.animation-5 > div:last-child {
    -webkit-transform: scaleY(0);
    transform: scaleY(0);
    -webkit-animation: animation-5 0.5s ease-out forwards;
    animation: animation-5 0.5s ease-out forwards;
}
#digits li:nth-child(2) > div {
    -webkit-animation-delay: 0.25s !important;
    animation-delay: 0.25s !important;
}
#digits li:nth-child(3) > div {
    -webkit-animation-delay: 0.5s !important;
    animation-delay: 0.5s !important;
}
#digits li:nth-child(4) > div {
    -webkit-animation-delay: 0.75s !important;
    animation-delay: 0.75s !important;
}
@-webkit-keyframes animation-0 {
    to {
        left: 0;
    }
}
@keyframes animation-0 {
    to {
        left: 0;
    }
}
@-webkit-keyframes animation-1 {
    to {
        left: 0;
    }
}
@keyframes animation-1 {
    to {
        left: 0;
    }
}
@-webkit-keyframes animation-2 {
    to {
        top: 0;
    }
}
@keyframes animation-2 {
    to {
        top: 0;
    }
}
@-webkit-keyframes animation-3 {
    to {
        top: 0;
    }
}
@keyframes animation-3 {
    to {
        top: 0;
    }
}
@-webkit-keyframes animation-4-old {
    50% {
        -webkit-transform: scaleX(0);
        transform: scaleX(0);
    }
    to {
        -webkit-transform: scaleX(0);
        transform: scaleX(0);
    }
}
@keyframes animation-4-old {
    50% {
        -webkit-transform: scaleX(0);
        transform: scaleX(0);
    }
    to {
        -webkit-transform: scaleX(0);
        transform: scaleX(0);
    }
}
@-webkit-keyframes animation-4 {
    50% {
        -webkit-transform: scaleX(0);
        transform: scaleX(0);
    }
    to {
        -webkit-transform: scaleX(1);
        transform: scaleX(1);
    }
}
@keyframes animation-4 {
    50% {
        -webkit-transform: scaleX(0);
        transform: scaleX(0);
    }
    to {
        -webkit-transform: scaleX(1);
        transform: scaleX(1);
    }
}
@-webkit-keyframes animation-5-old {
    50% {
        -webkit-transform: scaleY(0);
        transform: scaleY(0);
    }
    to {
        -webkit-transform: scaleY(0);
        transform: scaleY(0);
    }
}
@keyframes animation-5-old {
    50% {
        -webkit-transform: scaleY(0);
        transform: scaleY(0);
    }
    to {
        -webkit-transform: scaleY(0);
        transform: scaleY(0);
    }
}
@-webkit-keyframes animation-5 {
    50% {
        -webkit-transform: scaleY(0);
        transform: scaleY(0);
    }
    to {
        -webkit-transform: scaleY(1);
        transform: scaleY(1);
    }
}
@keyframes animation-5 {
    50% {
        -webkit-transform: scaleY(0);
        transform: scaleY(0);
    }
    to {
        -webkit-transform: scaleY(1);
        transform: scaleY(1);
    }
}
#hints {
    position: absolute;
    top: 0;
    right: 0;
    width: 1.5625em;
    height: 1.5625em;
    text-align: center;
    background: #373a33;
    color: #ffcd00;
    display: table;
    opacity: 0;
    -webkit-transition: opacity 0.5s ease;
    transition: opacity 0.5s ease;
}
#hints:hover {
    opacity: 1;
}
#hints > div {
    font-size: 0.25em;
    display: table-cell;
    vertical-align: middle;
}
#hints code {
    font-weight: bold;
    background-color: #ffcd00;
    color: #373a33;
    padding: 0 0.2em;
}
#expr-wrapper {
    position: relative;
    font-family: 'Fira Code', monospace;
}
#expr-caret {
    position: absolute;
    top: 50%;
    left: 16px;
    color: white;
    line-height: 0;
    opacity: 0.5;
}
#expr {
    font-family: 'Fira Code', monospace;
    background-color: #373a33;
    color: white;
    border-radius: 0;
    margin: 0;
    width: 100%;
    border-width: 0;
    box-sizing: border-box;
    font-size: 20px;
    line-height: 20px;
    padding: 10px;
    padding-left: 36px;
    text-align: right;
}
#expr:focus {
    outline: 0 none;
}
#rules {
    margin: 16px 0;
    padding: 0;
}
#rules li {
    list-style-type: none;
    line-height: 22px;
    padding: 4px 16px;
    -webkit-transition: background-color 0.5s;
    transition: background-color 0.5s;
}
#rules li b {
    text-transform: uppercase;
    text-shadow: 0 -4px 0 white;
}
#rules li.bad {
    background-color: #ffcd00;
}
#rules code {
    font-weight: bold;
    background-color: #373a33;
    color: #ffcd00;
    padding: 0 0.2em;
}
footer {
    text-align: center;
    height: 32px;
    line-height: 32px;
    position: relative;
    border: 4px solid #373a33;
    -webkit-transition: background-color 0.5s;
    transition: background-color 0.5s;
}
footer:hover {
    background-color: #ffcd00;
}
footer a {
    text-decoration: none;
    font-weight: bold;
    color: #373a33;
    display: block;
}

HTML

<header>
    <h1>
    <div id="js-background"></div>
    <div id="js">JS</div>
    <div id="twenty-four">
      <span>24</span>
      <span id="solution"></span>
    </div>
    <div id="result"></div>
  </h1>
    <div id="stats">
        <table>
            <tbody>
                <tr>
                    <td>won</td>
                    <td id="won"></td>
                </tr>
                <tr>
                    <td>total</td>
                    <td id="total"></td>
                </tr>
                <tr>
                    <td>average length</td>
                    <td id="average-length"></td>
                </tr>
            </tbody>
        </table>
    </div>
    <ul id="digits">
        <li></li>
        <li></li>
        <li></li>
        <li></li>
    </ul>
    <div id="hints">
        <div>too difficult?
            <br>type <code>skip</code>
        </div>
    </div>
</header>
<div id="expr-wrapper">
    <div id="expr-caret">&gt;</div>
    <input id="expr" autocomplete="off" type="text">
</div>

<ol id="rules">
    <li>Find a <b>valid</b> JavaScript expression</li>
    <li>whose value is <b>(Number)24</b>.</li>
    <li>Each of the four given numerical digits <b>must appear once</b>, and <b>no other</b> digits are allowed.</li>
    <li>Besides digits, <b>only</b> these operators are allowed: <code>+</code> <code>-</code> <code>*</code> <code>/</code> <code>%</code> <code>~</code> <code>&amp;</code> <code>|</code> <code>^</code> <code>&lt;&lt;</code> <code>&gt;&gt;</code> <code>(</code>        <code>)</code> and <code>x</code> <code>o</code>(after a given <code>0</code>).
        <br><small>* Can you do it like a boss? Try not to use parentheses <code>(</code> <code>)</code>.</small>
    </li>
    <li>In additional, to avoid <code>-~</code> from appearing continuously, <code>-</code> is <b>not allowed</b> to be used as a unary operator.</li>
</ol>

<footer>
    <a href="https://github.com/HandsomeOne/JavaScript24" target="_blank">· Fork me on GitHub ·</a>
</footer>

使用右上角的数字和允许的操作符输入计算公式，得出24的结果。小时候的算24经典小游戏。

html5, game, math

编辑器支持Emmet

快捷键

使用右上角的数字和允许的操作符输入计算公式，得出24的结果。小时候的算24经典小游戏。

html5, game, math

使用HTML5和ES6（JS）实现的在线数独游戏生成器和解答

HTML5 Canvas很有趣的拷贝猫小游戏

编辑器支持Emmet

快捷键

语言：

语言：

导入代码模板：