Sidenav默认打开而不是OnClick

我发现这个Sidenav在互联网上，我想用我的应用程序！链接到此：http://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_sidenav_none Sidenav默认打开而不是OnClick

<!DOCTYPE html> 
<html> 
<style> 
body { 
    font-family: "Lato", sans-serif; 
} 

.sidenav { 
    display: none; 
    height: 100%; 
    width: 250px; 
    position: fixed; 
    z-index: 1; 
    top: 0; 
    left: 0; 
    background-color: #111; 
    overflow-x: hidden; 
    padding-top: 60px; 
} 

.sidenav a { 
    padding: 8px 8px 8px 32px; 
    text-decoration: none; 
    font-size: 25px; 
    color: #818181; 
    display: block; 
    transition: 0.3s 
} 

.sidenav a:hover, .offcanvas a:focus{ 
    color: #f1f1f1; 
} 

.sidenav .closebtn { 
    position: absolute; 
    top: 0; 
    right: 25px; 
    font-size: 36px; 
    margin-left: 50px; 
} 

@media screen and (max-height: 450px) { 
    .sidenav {padding-top: 15px;} 
    .sidenav a {font-size: 18px;} 
} 
</style> 
<body> 

<div id="mySidenav" class="sidenav"> 
    <a href="javascript:void(0)" class="closebtn" onclick="closeNav()">&times;</a> 
    <a href="#">About</a> 
    <a href="#">Services</a> 
    <a href="#">Clients</a> 
    <a href="#">Contact</a> 
</div> 

<h2>Sidenav Example</h2> 
<p>Click on the element below to open the side navigation menu.</p> 
<span style="font-size:30px;cursor:pointer" onclick="openNav()">&#9776; open</span> 

<script> 
function openNav() { 
    document.getElementById("mySidenav").style.display = "block"; 
} 

function closeNav() { 
    document.getElementById("mySidenav").style.display = "none"; 
} 
</script> 

</body> 
</html>

但是，在sidenav当按钮被激活才开放，但我想它是默认打开的。我需要为此更改什么语法？

来源

2016-11-24 Anna Jeanine

你尝试自己做任何事 – thekodester

所有你需要做的就是删除默认情况下隐藏sidenav的CSS

.sidenav { 
    //display: none; - remove this line 
    height: 100%; 
    width: 250px; 
    position: fixed; 
    z-index: 1; 
    top: 0; 
    left: 0; 
    background-color: #111; 
    overflow-x: hidden; 
    padding-top: 60px; 
}

来源

2016-11-24 13:46:54 hairmot

太棒了！我会尽快接受这个答案 –

Sidenav默认打开而不是OnClick

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