为什么对齐项目不沿交叉轴居中？答案

【问题标题】：Why isn't align-items centering along the cross axis?为什么对齐项目不沿交叉轴居中？
【发布时间】：2019-11-11 11:33:12
【问题描述】：

在我的移动视图中，我将 .nav-links(container) 显示 flex 和 flow-direction 设置为 column。现在，我添加了 align-items 以将交叉轴设置为居中，但它没有在容器中居中显示。我尝试在 li 元素周围放置一个边框并将宽度设置为 100%，但它似乎在左侧显示了一个边距。我已将边距设置为 0 并检查以确保但无济于事。到目前为止，我只在 chrome 上测试过这个。任何想法都会非常感谢。

const navSlide = () => {
    const burger = document.querySelector(".burger");
    const nav = document.querySelector(".nav-links");
    const navLinks = document.querySelectorAll(".nav-links li");

    burger.addEventListener("click", ()=>{
        // Toggle Nav
        nav.classList.toggle("nav-active");

        // Animate Links
        navLinks.forEach((link, index) => {
            if(link.style.animation){
                link.style.animation = ""
            }
            else {
                link.style.animation = `navLinkFade 0.5s ease forwards ${index / 7 + .5}s`;
            }
        });

        //burger Animation
        burger.classList.toggle("toggle");


    });

    
}

navSlide();

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

nav{
    display: flex;
    justify-content: space-around;
    align-items: center;
    min-height: 8vh;
    background-color: rgb(83, 54, 110);
    font-family: 'Raleway', sans-serif;
}

.logo{
    color: rgba(226, 226, 226);
    text-transform: uppercase;
    letter-spacing: 5px;
    font-size: 20px;
}

.nav-links{
    display: flex;
    justify-content: space-around;
    width: 30%;
}

.nav-links li{
    list-style: none;
}

.nav-links a{
    color: rgba(226, 226, 226);
    text-decoration: none;
    letter-spacing: 3px;
    font-weight: bold;
    font-size: 14px;
}
.burger{
    display: none;
}
.burger div{
    width: 25px;
    height: 3px;;
    background-color: rgba(226, 226, 226);
    margin: 5px;
    transition: all 0.3s ease;
}

@media screen and (max-width:1024px){
    .nav-links{
        width: 60%;
    }
}

@media screen and (max-width:768px){
    body{
        overflow-x: hidden;
    }

    .nav-links{
        position: absolute;
        right: 0px;
        height: 92vh;
        top: 8vh;
        background-color: rgb(83, 54, 110);
        flex-direction: column;
        align-items: center;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
    }

    .nav-links li{
        opacity: 0;
    }


    .burger{
        display: block;
        cursor: pointer;
    }
}

.nav-active{
    transform: translateX(0%);
}

@keyframes navLinkFade{
    from{
        opacity: 0;
        transform: translateX(50px);
    }
    to{
        opacity: 1;
        transform: translateX(100px);
    }
}

.toggle .line1{
    transform: rotate(-45deg) translate(-5px, 6px);
}
.toggle .line2{
    opacity: 0;
}
.toggle .line3{
    transform: rotate(45deg) translate(-5px, -6px);
}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link href="https://fonts.googleapis.com/css?family=Raleway&display=swap" rel="stylesheet">
    <link rel="stylesheet" type="text/css" href="normalize.css">
    <link rel="stylesheet" type="text/css" href="style.css">
    <title>Sushi Gen</title>
</head>
<body>
    <nav>
        <div class="logo">
            <h4>Sushi Gen</h4>
        </div>
        <ul class="nav-links">
            <li>
                <a href="#">Home</a>
            </li>
            <li>
                <a href="#">Home</a>
            </li>
            <li>
                <a href="#">Home</a>
            </li>
            <li>
                <a href="#">Home</a>
            </li>
        </ul>
        <div class="burger">
            <div class="line1"></div>
            <div class="line2"></div>
            <div class="line3"></div>
        </div>
    </nav>

    <script src="sushiGen.js"></script>
</body>
</html>

【问题讨论】：

标签： javascript html css flexbox

【解决方案1】：

似乎是由 li 上的 translateX 引起的 - 您正在将它从中间移动 100px 到右侧。

如果您删除该动画，那么您的链接将居中：

const navSlide = () => {
    const burger = document.querySelector(".burger");
    const nav = document.querySelector(".nav-links");
    const navLinks = document.querySelectorAll(".nav-links li");

    burger.addEventListener("click", ()=>{
        // Toggle Nav
        nav.classList.toggle("nav-active");

        // Animate Links
        navLinks.forEach((link, index) => {
            if(link.style.animation){
                link.style.animation = ""
            }
            else {
                link.style.animation = `navLinkFade 0.5s ease forwards ${index / 7 + .5}s`;
            }
        });

        //burger Animation
        burger.classList.toggle("toggle");


    });

    
}

navSlide();

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

nav{
    display: flex;
    justify-content: space-around;
    align-items: center;
    min-height: 8vh;
    background-color: rgb(83, 54, 110);
    font-family: 'Raleway', sans-serif;
}

.logo{
    color: rgba(226, 226, 226);
    text-transform: uppercase;
    letter-spacing: 5px;
    font-size: 20px;
}

.nav-links{
    display: flex;
    justify-content: space-around;
    width: 30%;
}

.nav-links li{
    list-style: none;
}

.nav-links a{
    color: rgba(226, 226, 226);
    text-decoration: none;
    letter-spacing: 3px;
    font-weight: bold;
    font-size: 14px;
}
.burger{
    display: none;
}
.burger div{
    width: 25px;
    height: 3px;;
    background-color: rgba(226, 226, 226);
    margin: 5px;
    transition: all 0.3s ease;
}

@media screen and (max-width:1024px){
    .nav-links{
        width: 60%;
    }
}

@media screen and (max-width:768px){
    body{
        overflow-x: hidden;
    }

    .nav-links{
        position: absolute;
        right: 0px;
        height: 92vh;
        top: 8vh;
        background-color: rgb(83, 54, 110);
        flex-direction: column;
        align-items: center;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
    }

    .nav-links li{
        opacity: 0;
    }


    .burger{
        display: block;
        cursor: pointer;
    }
}

.nav-active{
    transform: translateX(0%);
}

@keyframes navLinkFade{
    from{
        opacity: 0;
    }
    to{
        opacity: 1;
    }
}

.toggle .line1{
    transform: rotate(-45deg) translate(-5px, 6px);
}
.toggle .line2{
    opacity: 0;
}
.toggle .line3{
    transform: rotate(45deg) translate(-5px, -6px);
}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link href="https://fonts.googleapis.com/css?family=Raleway&display=swap" rel="stylesheet">
    <link rel="stylesheet" type="text/css" href="normalize.css">
    <link rel="stylesheet" type="text/css" href="style.css">
    <title>Sushi Gen</title>
</head>
<body>
    <nav>
        <div class="logo">
            <h4>Sushi Gen</h4>
        </div>
        <ul class="nav-links">
            <li>
                <a href="#">Home</a>
            </li>
            <li>
                <a href="#">Home</a>
            </li>
            <li>
                <a href="#">Home</a>
            </li>
            <li>
                <a href="#">Home</a>
            </li>
        </ul>
        <div class="burger">
            <div class="line1"></div>
            <div class="line2"></div>
            <div class="line3"></div>
        </div>
    </nav>

    <script src="sushiGen.js"></script>
</body>
</html>

【讨论】：