HTML初学者小知识2

网页内嵌

代码以及演示如下

代码

<div id="tab_1">
    <iframe src="div.html"
            height="500"
            width="1200"
            frameborder="0"
            scrolling="0"
    ></iframe>
</div>

演示

php页面代码如下

<p><iframe src="链接" style="width:100%;height:465px;"></iframe></p>

HTML+CSS实现简单的相册自适应UI

HTML代码

<!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>css实现图片排版效果</title>
        <link rel="stylesheet" href="css的位置">
    </head>
    <body>

        <div class="centent">
            <div class="main">
                <div class="img">
                    <img src="链接" >
                </div>
            </div>
            <div class="main">
                <div class="img">
                    <img src="链接" >
                </div>
            </div>
            <div class="main">
                <div class="img">
                    <img src="链接" >
                </div>
            </div>
            <div class="main">
                <div class="img">
                    <img src="链接" >
                </div>
            </div>
        </div>
    </body>
</html>

css代码

body {
    padding: 15px;
    min-width: 320px;
}

.img>img {
    width: 100%;
    height: 100%;
    border-radius: 5px;
    object-fit: cover;
}

.img {
    display: flex;
    width: 90%;
    height: 90%;
    align-items: center;
    border-radius: 5px;
}

.main {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 25%;
    height: 250px;
    max-width: 25%;
}

.centent {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    height: auto;
    min-height: 320px;
}

@media screen and (max-width: 1000px) {
    .main {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 33.3%;
        height: 250px;
        max-width: 33.3%;
    }

    body {
        padding: 5px;
    }
}

@media screen and (max-width: 756px) {
    .main {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 50%;
        height: 250px;
        max-width: 50%;
    }

    body {
        padding: 8px;
    }
}

@media screen and (max-width: 500px) {
    body {
        padding: 3px;
    }
}

@media screen and (max-width: 350px) {
    body {
        padding: 0px;
    }
}