我们制作交互功能时，为了提高用户体验会考虑常规套路以外的情况。例如，手机导航点开后，并不一定要点击关闭按钮关闭导航，点击导航外的空白地方也可以实现导航的关闭。那么要如何实现呢？请看视频示例：

源码如下：
<!DOCTYPE html>
<html lang="zh-Hans">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="author" content="十分钟课堂">
    <title>点击对象外的其它空间</title>
    <style>
        html {
            --font-color: #7aabd6;
            --hover-color: rgba(36, 97, 151, 0.2);
            --background-color: #246197;
            font-family: 'Courier New', Courier, monospace;
            font-size: 15px;
        }

        *,
        :before,
        :after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        ::selection {
            color: var(--background-color);
            background-color: var(--font-color);
        }

        body {
            min-height: 100vh;
        }

        .toggle-btn {
            position: fixed;
            top: 10px;
            right: 10px;
            z-index: 5;
            width: 40px;
            height: 40px;
            cursor: pointer;
            transition: background-color 0.2s linear 0s;
            border-radius: 100em;
        }

        .toggle-btn:hover {
            background-color: var(--hover-color);
        }

        .toggle-btn:before,
        .toggle-btn:after {
            content: "";
            display: block;
            width: 50%;
            height: 3px;
            background-color: var(--background-color);
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -5px);
            transition: transform 0.4s cubic-bezier(.88, .22, .17, .98) 0s, background-color 0.4s cubic-bezier(.88, .22, .17, .98) 0s;
        }

        .toggle-btn:after {
            transform: translate(-50%, 2px);
        }

        .mobile-navigation {
            color: var(--font-color);
            width: 200px;
            height: 100%;
            position: fixed;
            top: 0;
            right: 0;
            background-color: var(--background-color);
            z-index: 4;
            padding: 100px 20px 30px;
            text-align: center;
            transform: translateX(101%);
            pointer-events: none;
            opacity: 0;
            transition: transform 0.3s cubic-bezier(.56, .15, .35, .99) 0s, opacity 0s linear 0.3s, pointer-events 0s linear 0.3s;
        }

        .show-mobile-navigation .mobile-navigation {
            transform: translateX(0);
            pointer-events: unset;
            opacity: 1;
            transition: transform 0.5s cubic-bezier(.56, .15, .35, .99) 0s, opacity 0s linear 0s, pointer-events 0s linear 0s;
        }

        .show-mobile-navigation .toggle-btn:before,
        .show-mobile-navigation .toggle-btn:after {
            transform: translate(-50%, -50%) rotate(45deg);
            background-color: var(--font-color);
        }

        .show-mobile-navigation .toggle-btn:after {
            transform: translate(-50%, -50%) rotate(-45deg);
        }
    </style>
</head>

<body>
    <div class="toggle-btn"></div>
    <div class="mobile-navigation">There are the mobile navigation elements.</div>
    <script>
        const body = document.getElementsByTagName("body")[0];
        const toggleBtn = document.getElementsByClassName("toggle-btn")[0];
        toggleBtn.addEventListener("click", (event) => {
            if (!body.classList.contains("show-mobile-navigation")) {
                body.classList.add("show-mobile-navigation");
            } else {
                body.classList.remove("show-mobile-navigation");
            }
        });
        document.addEventListener("click", (event) => {
            const mobileNavigationContent = document.getElementsByClassName("mobile-navigation")[0];
            let targetElement = event.target;
            do {
                if (targetElement == mobileNavigationContent || targetElement == toggleBtn) {
                    return;
                }
                targetElement = targetElement.parentNode;
            } while (targetElement);
            if (body.classList.contains("show-mobile-navigation")) {
                body.classList.remove("show-mobile-navigation");
            }
        });
    </script>
</body>

</html>