Pfeile am Ende der ersten Textzeile umschalten

Question

Wie füge ich Pfeile am Ende der ersten Zeile hinzu? Und ich möchte, dass es nach unten zeigt, wenn es zusammenfällt, und nach oben zeigen, wenn es erweitert wird. Wie unten gezeigt. Schätze deine Hilfe, danke!

$(".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>

-Code genommen von here

Answer 1

Ein Ansatz:

$(".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>

Answer 2

Sie <details>. Tag verwenden können. Das Tag gibt zusätzliche Details an, die der Benutzer bei Bedarf anzeigen oder ausblenden kann.

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>

Answer 3

Sie Pseudo-Element verwenden können, den Pfeil zu erstellen und sie nach der expander

Siehe Code-Schnipsel Klasse ändern:

$(".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>