我是靠谱客的博主 缥缈小海豚,最近开发中收集的这篇文章主要介绍Web API 实用案例02-延迟函数setTimeout()定时器03-自动消失的广告案例效果展示04-递归函数05-利用递归实现setInterval06-js执行机制07-location对象08-5秒后跳转的页面效果展示09-location.searchtarget.htmllocation.hashlocation.reload()10-history对象11-我们需要一个轮播图效果展示12-本地存储使用13-自定义属性,觉得挺不错的,现在分享给大家,希望可以做个参考。

概述

01-window对象

<!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>window对象</title>
    <style>
        div {
            height: 3000px;
        }
    </style>
</head>

<body>
    <div>

    </div>
    <script>
        //window可以省略
        window.document.querySelector('div');
        window.addEventListener('scroll', function() {
                // alert(1)
            })
            // window.alert(2);
        window.prompt;
        console.log(window);
    </script>
</body>

</html>

02-延迟函数setTimeout()定时器

<!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>延迟函数setTimeout()定时器</title>
</head>

<body>
    <button>解除定时器</button>
    <script>
        let btn = document.querySelector('button');
        let timer = setTimeout(function() {
                console.log(111);
            }, 3000)
            //仅仅执行一次
        btn.addEventListener('click', function() {
            clearTimeout(timer)
        })
    </script>
</body>

</html>

03-自动消失的广告案例

<!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>Document</title>
    <style>
        img {
            position: absolute;
            left: 0;
            bottom: 0;
        }
    </style>
</head>

<body>
    <img src="images/ad.png" alt="">
    <script>
        let img = document.querySelector('img');
        setTimeout(function() {
            img.style.display = 'none';
        }, 5000)
    </script>
</body>

</html>

效果展示

在这里插入图片描述

04-递归函数

<!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>Document</title>
</head>

<body>
    <script>
        // 递归函数:自己调用自己就是递归函数
        // 递归函数容易造成死递归,需要加个退出的条件
        let num = 0;

        function fn() {
            num++;
            console.log(11);;
            //在函数里面,自己调用自己
            if (num >= 100) {
                return;
            }
            fn()
        }
        fn();
    </script>
</body>

</html>

05-利用递归实现setInterval

<!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>Document</title>
</head>

<body>
    <div></div>
    <script>
        let div = document.querySelector('div');
        //利用递归函数 模拟了setinterval
        function fn() {
            //获取当前时间
            div.innerHTML = new Date().toLocaleString()
            setTimeout(fn, 1000);

        }
        fn();
    </script>
</body>

</html>

06-js执行机制

<!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>Document</title>
</head>

<body>
    <script>
        // 1.先执行 执行栈中的同步任务
        // 2.异步任务放入任务队列中
        // 3.一旦执行栈中的所有同步任务执行完毕,系统就会按次序读取任务队列中的异步任务,于是被读取的异步任务结束等待状态,进入执行栈,开始执行
        console.log(1);
        setTimeout(function() {
            console.log(2);
        })
        console.log(3);
        // 输出结果 1 3 2
    </script>
</body>

</html>

07-location对象

<!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>Document</title>
</head>

<body>
    <script>
        console.log(location.href); // 得到url地址   可读写
        // 给的地址是字符串,可以利用js的方式自动跳转页面
        location.href = 'http://www.itcast.cn'
    </script>
</body>

</html>

08-5秒后跳转的页面

<!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>Document</title>
    <style>
        span {
            color: red;
        }
    </style>
</head>

<body>
    <a href="http://www.itcast.cn">支付成功,<span>5</span>秒后跳转页面</a>
    <script>
        let a = document.querySelector('a');
        let num = 5;
        let timer = setInterval(function() {
            num--;
            a.innerHTML = `支付成功,<span>${num}</span>秒后跳转页面`
            if (num === 0) {
                clearInterval(timer);
                // 0秒后自动跳转页面
                location.href = 'http://www.itcast.cn'
            }

        }, 1000)
    </script>
</body>

</html>

效果展示

在这里插入图片描述

09-location.search

<!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>Document</title>
</head>

<body>
    <form action="target.html">
        <input type="text" name="username">
        <button>提交</button>
    </form>
</body>

</html>

target.html

<!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>Document</title>
</head>

<body>
    <script>
        // 完整的地址是:file:///D:/VScode%20project/%E9%BB%91%E9%A9%AC%E7%A8%8B%E5%BA%8F%E5%91%98/%E6%9C%80%E6%96%B0Web%20APIs/%E7%AC%AC%E5%85%AD%E5%A4%A9/target.html?username=abc
        //    location.search 可以得到 ?后面的内容 :username=abc
        // location.href 可以得到完整的地址
        // location.hash 获取地址中的哈希值,即 # 后面的内容
        console.log(location.search);
    </script>
</body>

</html>

location.hash

<!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>Document</title>
</head>

<body>
    <a href="#one">第一个</a>
    <a href="#two">第二个</a>
    <script>
        console.log(location.hash); //#one #two
        // location.hash 获取地址中的哈希值,即 # 后面的内容
    </script>

</body>

</html>

location.reload()

<!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>Document</title>
</head>

<body>
    <button>刷新</button>
    <script>
        let btn = document.querySelector('button');
        btn.addEventListener('click', function() {
            // location.reload() 是个方法,用来刷新页面  刷新的方法有本地缓存和强制刷新(直接从网上拉取更新最新内容)
            // 参数为true,表示强制刷新,相当于ctrl+F5 默认参数是false,平时省略
            location.reload(true)
        })
    </script>
</body>

</html>

10-history对象

<!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>Document</title>
</head>

<body>
    <button class="forward">前进</button>
    <button class="back">后退</button>
    <script>
        let forward = document.querySelector('.forward')
        let back = document.querySelector('.back')
        forward.addEventListener('click', function() {
            history.forward()
        })
        back.addEventListener('click', function() {
            history.back()
        })
    </script>

</body>

</html>

11-我们需要一个轮播图

<!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>Document</title>
    <link rel="stylesheet" href="./css/swiper-bundle.min.css">
    <style>
        .box {
            width: 600px;
            height: 350px;
            background-color: pink;
            margin: 100px auto;
        }
        
        html,
        body {
            position: relative;
            height: 100%;
        }
        
        body {
            background: #eee;
            font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
            font-size: 14px;
            color: #000;
            margin: 0;
            padding: 0;
        }
        
        .swiper-container {
            width: 100%;
            height: 100%;
            margin-left: auto;
            margin-right: auto;
        }
        
        .swiper-slide {
            text-align: center;
            font-size: 18px;
            background: #fff;
            /* Center slide text vertically */
            display: -webkit-box;
            display: -ms-flexbox;
            display: -webkit-flex;
            display: flex;
            -webkit-box-pack: center;
            -ms-flex-pack: center;
            -webkit-justify-content: center;
            justify-content: center;
            -webkit-box-align: center;
            -ms-flex-align: center;
            -webkit-align-items: center;
            align-items: center;
        }
        
        .swiper-slide img {
            width: 100%;
            height: 350px;
        }
        
        .swiper-pagination-bullet {
            width: 12px;
            height: 12px;
        }
        
        .swiper-pagination-bullet-active {
            color: #fff;
        }
    </style>


</head>

<body>
    <div class="box">
        <!-- Swiper -->
        <!-- swiper-container 是原有的不能删掉 可以再多加个名 -->
        <div class="swiper-container one">
            <div class="swiper-wrapper">
                <div class="swiper-slide">
                    <a href="#">
                        <img src="images/b_01.jpg" alt="">
                    </a>
                </div>
                <div class="swiper-slide">
                    <a href="#">
                        <img src="images/b_02.jpg" alt="">
                    </a>
                </div>
                <div class="swiper-slide">
                    <a href="#">
                        <img src="images/b_03.jpg" alt="">
                    </a>
                </div>
                <div class="swiper-slide">
                    <a href="#">
                        <img src="images/b_04.jpg" alt="">
                    </a>
                </div>
                <div class="swiper-slide">
                    <a href="#">
                        <img src="images/b_05.jpg" alt="">
                    </a>
                </div>
                <div class="swiper-slide">
                    <a href="#">
                        <img src="images/b_06.jpg" alt="">
                    </a>
                </div>

            </div>
            <!-- Add Pagination -->
            <div class="swiper-pagination"></div>
            <!-- Add Arrows -->
            <div class="swiper-button-next"></div>
            <div class="swiper-button-prev"></div>
        </div>
    </div>


    <div class="box">
        <!-- Swiper -->
        <div class="swiper-container two">
            <div class="swiper-wrapper">
                <div class="swiper-slide">
                    <a href="#">
                        <img src="images/b_01.jpg" alt="">
                    </a>
                </div>
                <div class="swiper-slide">
                    <a href="#">
                        <img src="images/b_02.jpg" alt="">
                    </a>
                </div>
                <div class="swiper-slide">
                    <a href="#">
                        <img src="images/b_03.jpg" alt="">
                    </a>
                </div>
                <div class="swiper-slide">
                    <a href="#">
                        <img src="images/b_04.jpg" alt="">
                    </a>
                </div>
                <div class="swiper-slide">
                    <a href="#">
                        <img src="images/b_05.jpg" alt="">
                    </a>
                </div>
                <div class="swiper-slide">
                    <a href="#">
                        <img src="images/b_06.jpg" alt="">
                    </a>
                </div>

            </div>
            <!-- Add Pagination -->
            <div class="swiper-pagination"></div>
            <!-- Add Arrows -->
            <div class="swiper-button-next"></div>
            <div class="swiper-button-prev"></div>
        </div>
    </div>
    <script src="js/swiper-bundle.min.js"></script>
    <!-- 要放到插件的下面 -->
    <!-- Initialize Swiper -->
    <script>
        var swiper = new Swiper('.one', {
            slidesPerView: 1,
            // 自动播放
            autoplay: {
                delay: 2000, //2秒切换一次
                stopOnLastSlide: true, //如果设置为true,当切换到最后一个slide时停止自动切换。(loop模式下无效)。
                disableOnInteraction: false, //用户操作(拖拉)swiper之后,是否禁止autoplay。默认为true:停止。
            },
            // 小红色的背景是30px 可去掉
            spaceBetween: 30,
            // 是否循环播放 false为不循环
            loop: true,
            pagination: {
                // 小圆点 
                el: '.swiper-pagination',
                // 是否可点击 true为可点击 false为不可点击
                clickable: true,
            },
            navigation: {
                nextEl: '.swiper-button-next',
                prevEl: '.swiper-button-prev',
            },
            keyboard: true, //设置开启键盘来控制Swiper切换。
            //设为true时,能使用键盘的方向键控制slide切换。
        });
        var swiper = new Swiper('.two', {
            slidesPerView: 1,
            // 自动播放
            autoplay: {
                delay: 5000, //2秒切换一次
                stopOnLastSlide: true, //如果设置为true,当切换到最后一个slide时停止自动切换。(loop模式下无效)。
                disableOnInteraction: false, //用户操作(拖拉)swiper之后,是否禁止autoplay。默认为true:停止。
            },
            // 小红色的背景是30px 可去掉
            spaceBetween: 30,
            // 是否循环播放 false为不循环
            loop: true,
            pagination: {
                // 小圆点 
                el: '.swiper-pagination',
                // 是否可点击 true为可点击 false为不可点击
                clickable: true,
            },
            navigation: {
                nextEl: '.swiper-button-next',
                prevEl: '.swiper-button-prev',
            },
            keyboard: true, //设置开启键盘来控制Swiper切换。
            //设为true时,能使用键盘的方向键控制slide切换。
        });
    </script>
</body>

</html>

效果展示

在这里插入图片描述

12-本地存储使用

<!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>Document</title>
</head>

<body>
    <script>
        // 存储数据 localStorage.setItem('键','值')
        // localStorage.setItem('uname', 'pink老师')
        // localStorage.setItem('age', '18')


        // 获取数据  localStorage.getItem('键')
        //console.log(localStorage.getItem('uname'));

        // 删除数据 localStorage.removeItem('键')
        // localStorage.removeItem('uname');

        // 1.存储复杂数据类型(引用数据类型)  // 复杂数据类型一定要转换为JSON字符串再进行存储
        let obj = {
                uname: '刘德华',
                age: 18,
                address: '黑马程序员'
            }
            // console.log(JSON.stringify(obj));
        localStorage.setItem('obj', JSON.stringify(obj));

        // 2.获取复杂数据类型 JSON.parce() 将JSON字符串转换为对象
        //console.log(localStorage.getItem('obj')); //localStorage.getItem('obj')是个字符串 
        // console.log(typeof(localStorage.getItem('obj')));  //string
        console.log(JSON.parse(localStorage.getItem('obj')));

        let object = {
                age: 18
            }
            //本地存储只能存储字符串,所以需要转换 转换为JSON字符串
        localStorage.setItem('key', JSON.stringify(object))
            // 获取过来的值是字符串,不是对象了没有办法直接使用,因此首先需要把字符串转换为对象
            // JSON.parse()
        console.log(JSON.parse(localStorage.getItem('key')))


        //JSON 字符串 属性和值都是双引号包含
        // let obj = {
        //     "uname": "刘德华",
        //     "age": "18",
        //     "address": "黑马程序员"
        // }
    </script>
</body>

</html>

13-自定义属性

<!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>Document</title>
</head>

<body>
    <div class="box" data-index="0" data-name="andy"></div>
    <script>
        // 设置自定义属性  规范写法 data-开头
        let box = document.querySelector('.box');
        box.setAttribute('myid', 10)
            // 获取自定义属性
        console.log(box.getAttribute('myid'));
        console.log(box.dataset); // dataset是一个对象
        // 获取自定义属性的值 利用 对象.属性 的方式获取
        console.log(box.dataset.index);
    </script>
</body>

</html>

最后

以上就是缥缈小海豚为你收集整理的Web API 实用案例02-延迟函数setTimeout()定时器03-自动消失的广告案例效果展示04-递归函数05-利用递归实现setInterval06-js执行机制07-location对象08-5秒后跳转的页面效果展示09-location.searchtarget.htmllocation.hashlocation.reload()10-history对象11-我们需要一个轮播图效果展示12-本地存储使用13-自定义属性的全部内容,希望文章能够帮你解决Web API 实用案例02-延迟函数setTimeout()定时器03-自动消失的广告案例效果展示04-递归函数05-利用递归实现setInterval06-js执行机制07-location对象08-5秒后跳转的页面效果展示09-location.searchtarget.htmllocation.hashlocation.reload()10-history对象11-我们需要一个轮播图效果展示12-本地存储使用13-自定义属性所遇到的程序开发问题。

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