在第一行文本末尾切換箭頭

如何在第一行文本末尾添加箭頭？我希望它在崩潰時指向下方，並在展開時指向它。如下圖所示。感謝您的幫助，謝謝！在第一行文本末尾切換箭頭

$(".expander").click(function() { 
 
    if ($(this).hasClass("expander")) { 
 
     $(this).removeClass("expander"); 
 
    } 
 
    else { 
 
     $(this).addClass("expander"); 
 
    } 
 
});

.expander { 
 
    height: 1em; 
 
    overflow: hidden; 
 
    cursor: pointer; 
 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<div class="expander"> 
 
    Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32. 
 
</div>

代碼從here

來源

2017-07-04 Eelyn

僅供參考，你可以簡化'click'處理程序，以單行：'$（本）.toggleClass（「擴展」）' –

一種方法：

$(".expander").click(function() { 
 
    if ($(this).hasClass("expander")) { 
 
    $(this).removeClass("expander"); 
 
    $(".panel").addClass("open"); 
 
    } else { 
 
    $(this).addClass("expander"); 
 
    $(".panel").removeClass("open"); 
 
    } 
 
});

.panel { 
 
    position: relative; 
 
} 
 

 
.expander { 
 
    height: 1em; 
 
    overflow: hidden; 
 
    cursor: pointer; 
 
    position: relative; 
 
    padding-right: 50px; 
 
} 
 

 
.panel:after { 
 
    content: "V"; 
 
    position: absolute; 
 
    top: 0; 
 
    right: 0; 
 
    font-family: sans-serif; 
 
} 
 

 
.panel.open:after { 
 
    transform: rotate(180deg); 
 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<div class="panel"> 
 
    <div class="expander"> 
 
    Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up 
 
    one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum 
 
    et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 
 
    1.10.32. 
 
    </div> 
 
</div>

來源

2017-07-04 09:31:21 sol

謝謝你的回答，它是有效的。 – Eelyn

採取可以使用<details>.標籤。該標籤指定了用戶可以按需查看或隱藏的附加細節。

details summary::-webkit-details-marker { 
 
    background: #fff; 
 
    color: green; 
 
    font-size: 200%; 
 
    float: right; 
 
    
 
}

<details> 
 
    <summary> Contrary to popular belief , Lorem Ipsum is not..</summary> 
 
    
 
    <p>Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. </p> 
 
</details>

來源

2017-07-04 09:28:35

我看到這個代碼在線，但是可以通過使用'detail'來改變箭頭的位置嗎？ – Eelyn

我們可以改變從右到左的位置不確定我們可以在展開時將展開圖標移到底部。可以改變圖標的顏色或替換爲背景圖像。 –

您可以使用僞元素根據類expander

見代碼片段創建的箭頭並更改：

$(".expander").click(function() { 
 
    if ($(this).hasClass("expander")) { 
 
    $(this).removeClass("expander"); 
 
    } else { 
 
    $(this).addClass("expander"); 
 
    } 
 
});

div { 
 
    padding: 0 10px; 
 
} 
 

 
.expander { 
 
    height: 1em; 
 
    overflow: hidden; 
 
    cursor: pointer; 
 
} 
 

 
div::after { 
 
    content: ''; 
 
    width: 0; 
 
    height: 0; 
 
    border: 8px solid; 
 
    border-color: #000 transparent transparent transparent; 
 
    position: absolute; 
 
    right: 0px; 
 
    top: 15px; 
 
} 
 

 
.expander::after { 
 
    top: 10px; 
 
    border-color: transparent transparent transparent #000; 
 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<div class="expander"> 
 
    Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up 
 
    one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum 
 
    et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 
 
    1.10.32. 
 
</div>

來源

2017-07-04 09:30:43 Chiller

謝謝你的回答，這是有效的。 – Eelyn

在第一行文本末尾切換箭頭

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