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实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/css/style1.css">
</head>
<body>
<p>单行</p>
<div class="container flex flex-start">
    <span class="ietm">tiem1</span>
    <span class="ietm">tiem2</span>
    <span class="ietm">tiem3</span>
</div>
<P>多行</P>
<div class="container flex flex-start wrap"></div>
<span class="item">弹性元素 1</span>
<span class="item">弹性元素 2</span>
<span class="item">弹性元素 3</span>
<span class="item">弹性元素 4</span>
<span class="item">弹性元素 5</span>
<span class="item">弹性元素 6</span>

</body>
</html>

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实例

/*弹性容器通用样式*/
.container {
    border: 2px dashed red;
    margin: 15px;
    background: #cdc;
}


/*弹性元素通用样式*/
.item {
    box-sizing: border-box;
    border: 1px solid;
    padding: 20px;
    background: #ede;
}

/*块级弹性容器*/
.flex {
    display: flex;
}

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实例

a {
    padding: 5px 10px;
    margin: 0 5px;
    border-radius: 5px 5px 0 0;
    text-decoration-line: none;
    background-color: lightgreen;
    box-shadow: 2px 0 1px #888;
    color: black;
}

a:hover,
/*tab切换进也会激活*/a:focus,
a:active {
    background-color: orangered;
    color: white;
}

nav {
    display: flex;
    border-bottom: 1px solid gray;
}

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实例

@import "public.css";


.row {
    flex-direction: row;
}

.row-reverse {
    flex-direction: row-reverse;
}

.column {
    flex-direction: column;
}

.column-reverse {
    flex-direction: column-reverse;
}

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实例

@import "style2.css";


    outline: 1px solid #ccc;

    margin: 10px;
    padding: 10px;
}


body, nav, main, article {
    display: flex;
}


body, article {
    flex-direction: column;
}


footer {
    border-top: 1px solid #ccc;
}


nav {
    padding-bottom: 0;
}

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实例

@import "public.css";

.container {
    width: 500px;
}


.nowrap {
    flex-direction: row;
    flex-wrap: nowrap;
}

.wrap {
    flex-direction: row;
    flex-wrap: wrap;
}

.wrap-reverse {
    flex-direction: row;
    flex-wrap: wrap-reverse;
}

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实例

@import "public.css";


.container {
    width: 500px;
}


.nowrap {
    /*flex-direction: row;*/
    /*flex-wrap: nowrap;*/


    flex-flow: row nowrap;
}


.item {
    /*min-width: 0;*/
}



.wrap {
    /*flex-direction: row;*/
    /*flex-wrap: wrap;*/


    flex-flow: row wrap;
}

.wrap-reverse {
    /*flex-direction: row;*/
    /*flex-wrap: wrap-reverse;*/

 flex-flow: row wrap-reverse;
}

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实例

@import "public.css";


.container {
    width: 550px;
}


.wrap {
    flex-wrap: wrap;
}

.flex-start {
    justify-content: flex-start;
}

.flex-end {
    justify-content: flex-end;
}

.center {
    justify-content: center;
}

.space-between {
    justify-content: space-between;
}


.space-around {
    justify-content: space-around;
}

.space-evenly {
    justify-content: space-evenly;
}

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实例

@import "public.css";





.container {
    width: 550px;
    height: 300px;
}


    .wrap {
    flex-wrap: wrap;
}

.stretch {
    align-items: stretch;

}


.flex-start {
    align-items: flex-start;
}

.flex-end {
    align-items: flex-end;
}

.center {
    align-items: center;
}


.wrap-stretch {

    align-content: stretch;
}


.wrap-flex-start {
    align-content: flex-start;
}

.wrap-flex-end {
    align-content: flex-end;
}


.wrap-center {
    align-content: center;
}

/*5. space-between*/
.wrap-space-between {
    align-content: space-between;
}

/*6. space-around*/
.wrap-space-around {
    align-content: space-around;
}

/*7. space-evenly*/
.wrap-space-evenly {
    align-content: space-evenly;
}


.all-align {
    justify-content: space-around;
    align-content: space-around;
}

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Correction status:qualified

Teacher's comments:作业中不必再放运行按钮, 实际上也运行不了, 是不是呢?
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