您好，我正在嘗試為我的網(wǎng)站創(chuàng)建一個(gè)側(cè)邊欄，該側(cè)邊欄具有隨其移動(dòng)的打開(kāi)/關(guān)閉按鈕。我的代碼基于w3school的示例，該示例中有兩個(gè)單獨(dú)的按鈕用于打開(kāi)和關(guān)閉。我不喜歡有兩個(gè)單獨(dú)的按鈕來(lái)完成任務(wù)，并且想將它們組合起來(lái)。所以我將示例修改為：如果您嘗試運(yùn)行代碼，那么當(dāng)您第一次單擊該按鈕時(shí)，側(cè)邊欄將打開(kāi)并且按鈕也會(huì)隨之打開(kāi)。這很棒，也是我想要的，問(wèn)題是關(guān)閉側(cè)邊欄時(shí)按鈕不會(huì)返回到其原始位置。側(cè)邊欄打開(kāi)和關(guān)閉沒(méi)有問(wèn)題，但似乎這行代碼不起作用document.getElementById("sidebarButton").style.Left = "0px";知道如何修復(fù)它嗎？
2 回答
胡說(shuō)叔叔
TA貢獻(xiàn)1804條經(jīng)驗(yàn) 獲得超8個(gè)贊
盡管樣式屬性在樣式表內(nèi)部不區(qū)分大小寫(xiě)，但樣式的 JavaScript API 區(qū)分大小寫(xiě)。因此，設(shè)置style.Left將不起作用，因?yàn)檎_的屬性名稱是left。
document.getElementById("sidebarButton").style.left = '0';
暮色呼如
TA貢獻(xiàn)1853條經(jīng)驗(yàn) 獲得超9個(gè)贊
你有一個(gè)拼寫(xiě)錯(cuò)誤document.getElementById("sidebarButton").style.Left應(yīng)該是document.getElementById("sidebarButton").style.left
var lastState = false;
function sideButtonClicked() {
if (!lastState) {
//open
lastState = true
document.getElementById("mySidebar").style.width = "250px";
document.getElementById("main").style.marginLeft = "250px";
document.getElementById("sidebarButton").style.left = "250px";
} else {
//close
lastState = false
document.getElementById("mySidebar").style.width = "0px";
document.getElementById("main").style.marginLeft = "0px";
document.getElementById("sidebarButton").style.left = "0px";
}
}
body {
font-family: "Lato", sans-serif;
}
.sidebar {
height: 100%;
width: 0;
position: fixed;
z-index: 1;
top: 0;
left: 0;
background-color: #111;
overflow-x: hidden;
transition: 0.5s;
padding-top: 60px;
}
.sidebar a {
padding: 8px 8px 8px 32px;
text-decoration: none;
font-size: 25px;
color: #818181;
display: block;
transition: 0.3s;
}
.sidebar a:hover {
color: #f1f1f1;
}
.openbtn {
font-size: 20px;
cursor: pointer;
position: fixed;
bottom: 50%;
left: 0;
background-color: #111;
color: white;
padding: 10px 15px;
border: none;
z-index: 1;
transition: 0.5s;
}
.openbtn:hover {
background-color: #444;
}
#main {
transition: margin-left .5s;
padding: 16px;
}
/* On smaller screens, where height is less than 450px, change the style of the sidenav (less padding and a smaller font size) */
@media screen and (max-height: 450px) {
.sidebar {
padding-top: 15px;
}
.sidebar a {
font-size: 18px;
}
}
<div id="mySidebar" class="sidebar">
<a href="#">About</a>
<a href="#">Services</a>
<a href="#">Clients</a>
<a href="#">Contact</a>
</div>
<div id="main">
<button id="sidebarButton" class="openbtn" onclick="sideButtonClicked()">?</button>
<h2>Collapsed Sidebar</h2>
<p>Click on the hamburger menu/bar icon to open the sidebar, and push this content to the right.</p>
</div>
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