div滾動條沉底

<div id="chatContent" class="chat">
</div>

<pre name="code" class="css">.chat {
    background-color: #dcdde0;
    box-sizing: border-box;
    max-height: 6.1rem;
    overflow: auto;
    padding: 5px 8px;

}

/**js代碼**/

<pre name="code" class="javascript">function scrollToBottom(){
    var content = $("#chatContent");
    content.scrollTop(content.get(0).scrollHeight);
}