这篇“怎么用HTML+CSS+JS实现猜数字游戏”文章的知识点大部分人都不太理解，所以小编给大家总结了以下内容，内容详细，步骤清晰，具有一定的借鉴价值，希望大家阅读完这篇文章能有所收获，下面我们一起来看看这篇“怎么用HTML+CSS+JS实现猜数字游戏”文章吧。
1.猜数字
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>猜数字游戏</title></head><body> <input type="button" id="reset" value="重新开始一局游戏"> <div> <span>请输入要猜的数字:</span> <input type="text" id="num"> <input type="button" value="猜" id="guess"> </div> <div> <span>已经猜的次数: </span> <span id="count"> 0 </span> </div> <div> <span>猜的结果: </span> <span id="result"></span> </div> <script> // 先获取要用到的 JS 的 DOM 对象 let resetButton = document.querySelector("#reset") let numInput = document.querySelector('#num'); let guessButton = document.querySelector('#guess'); let countSpan = document.querySelector('#count'); let resultSpan = document.querySelector('#result'); //生成一个1~100之间的随机整数 let toGuess = Math.floor(Math.random()*100) + 1; let count = 0; console.log("toGuess: " + toGuess); guessButton.onclick = function(){ // 用户点击 [猜] 这个按钮, 首先先更新点击次数的显示. count++; countSpan.innerHTML = count; // 读取到输入框的内容, 进行判定 let num = parseInt(numInput.value); console.log("num: " + num); if(num < toGuess){ resultSpan.innerHTML = '猜低了'; resultSpan.style.color = 'red'; }else if(num > toGuess){ resultSpan.innerHTML = '猜高了'; resultSpan.style.color = 'green'; }else{ resultSpan.innerHTML = '猜对了'; resultSpan.style.color = 'orange'; } } resetButton.onclick = function(){ // 把 toGuess 和 count 清空, 同时重新生成一个随机的整数 toGuess = Math.floor(Math.random() * 100) + 1; count = 0; resultSpan.innerHTML = ''; countSpan.innerHTML = ''; numInput.value = ''; } </script></body></html>
2.表白墙
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>messageWall</title></head><body> <style> *{ margin:0; padding:0; } .container { width: 100%; height:100%; } h2{ text-align:center; padding:20px 0; } p{ font-size: 15px; color:grey; padding:10px 0; text-align: center; } .row{ display:flex; height:50px; justify-content: center; align-items: center; } .row span{ width:100px; } .row .edit{ width: 200px; height: 36px; } .row .submit{ width:300px; height:30px; background-color: orange; color:#fff; border: none; } .row .submit:active{ background-color: grey; } </style> <div class="container"> <h2>表白墙</h2> <p>输入后点击提交, 将会把消息显示在墙上</p> <div class="row"> <span>谁:</span> <input type="text" class="edit"> </div> <div class="row"> <span>对谁:</span> <input type="text" class="edit"> </div> <div class="row"> <span>说什么:</span> <input type="text" class="edit"> </div> <div class="row"> <input type="button" value="提交" class="submit"> </div> </div> <script> let submitButton = document.querySelector('.submit'); submitButton.onclick = function() { // 1. 获取到输入框里面的内容 let edits = document.querySelectorAll('.edit'); let from = edits[0].value; let to = edits[1].value; let message = edits[2].value; console.log(from + ", " + to + ", " + message); if (from == '' || to == '' || message == '') { return; } //2. 创建一个新的元素节点，即获取到的输入框信息 //将其添加到DOM树中 let row = document.createElement('div'); row.className = 'row'; row.innerHTML = from + '对' + to + '说: ' + message; let container = document.querySelector('.container'); container.appendChild(row); //3. 把上次输入的内容清空 for(let i = 0; i < edits.length; i++){ edits[i].value = ''; } } </script></body></html>
3.切换日夜间模式
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>切换日夜间模式</title></head><body> <style> *{ margin:0; padding: 0; } html,body { width: 100%; height: 100%; } .light{ background-color: #fff; color: #000; font-size: 40px;; } .dark{ background-color: #666; color: #eee; font-size: 40px;; } </style> <div class="light"> 代码案例:切换日夜间模式; </div> <script> let div = document.querySelector('div'); div.onclick = function(){ console.log(div.className); if (div.className.indexOf('light') != -1) { div.className = 'dark'; }else{ div.className = 'light'; } } </script> </body></html>4.待办事项
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>todoList</title></head><body> <style> * { padding: 0; margin: 0; box-sizing: border-box; } .nav { width: 600px; margin: 0 auto; display: flex; justify-content: center; align-items: center; } .nav input { width: 450px; height: 50px; font-size: 25px; padding-left: 10px; } .nav button { width: 150px; height: 50px; border: none; color: white; background-color: orange; font-size: 18px; } .nav button:active { background-color: grey; } .container { width: 600px; margin: 0 auto; display: flex; justify-content: center; margin-top: 10px; } .container .left, .container .right { width: 50%; } .container .left h4, .container .right h4 { text-align: center; height: 50px; line-height: 50px; background-color: black; color: white; } .container .row { height: 50px; display: flex; align-items: center; justify-content: flex-start; } .container .row span { width: 240px; } .container .row button { width: 40px; height: 30px; } .container .row input { margin-right: 5px; } </style> <!-- 表示上方的 div, 里面放输入框和按钮 --> <div class="nav"> <input type="text"> <button>新建任务</button> </div> <!-- 这个是下方的 div, 里面分成左右两栏 --> <div class="container"> <div class="left"> <h4>未完成</h4> <!-- <div class="row"> <input type="checkbox"> <span>吃饭</span> <button>删除</button> </div> --> </div> <div class="right"> <h4>已完成</h4> </div> </div> <script> let addTaskBtn = document.querySelector(".nav button"); addTaskBtn.onclick = function() { // 1. 获取到输入框的内容 let input = document.querySelector(".nav input"); let taskContent = input.value; // 2. 创建一个 div.row, 里面设置上需要的 复选框, 文本, 删除按钮 let row = document.createElement('div'); row.className = 'row'; let checkBox = document.createElement('input'); checkBox.type = 'checkbox'; let span = document.createElement('span'); span.innerHTML = taskContent; let deleteBtn = document.createElement('button'); deleteBtn.innerHTML = '删除'; row.appendChild(checkBox); row.appendChild(span); row.appendChild(deleteBtn); // 3. 把 div.row 添加到 .left 中~ let left = document.querySelector('.left'); left.appendChild(row); // 4. 给 checkBox 增加一个点击处理函数. 点击之后就能够移动任务 checkBox.onclick = function() { // 当用户点击的时候, 就获取到当前的这个 row 这个元素 // 把这 row 给添加到另外一侧. // 也可以根据 checkBox 的选中状态决定是在 left 还是 right let target = null; if (checkBox.checked) { // 已经是选中的状态 // 就把这个元素放到右边 target = document.querySelector('.right'); } else { // 是未选中的状态 // 就把这个元素放到左边 target = document.querySelector('.left'); } target.appendChild(row); } // 5. 实现删除效果, 给删除按钮新增一个删除操作 deleteBtn.onclick = function() { // 要想删除 row, 就需要知道 row 的父元素 let parent = row.parentNode; parent.removeChild(row); } } </script></body></html>
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