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[英]JavaScript code working on other browsers but not working on IE11, why?
[英]why my code don't working in IE11
在Internet Explorer 11中 ,當我單擊按鈕外部時,該子菜單不會隱藏,但在Google Chrome和Firefox中可以正常工作。
http://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_onclick_dropdown
<!DOCTYPE html>
<html>
<head>
<style>
.dropbtn {
background-color: #4CAF50;
color: white;
padding: 16px;
font-size: 16px;
border: none;
cursor: pointer;
}
.dropbtn:hover, .dropbtn:focus {
background-color: #3e8e41;
}
.dropdown {
position: relative;
display: inline-block;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
overflow: auto;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}
.dropdown-content a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}
.dropdown-content a:hover {background-color: #f1f1f1}
.show {display:block;}
</style>
</head>
<body>
<h2>Clickable Dropdown</h2>
<p>Click on the button to open the dropdown menu.</p>
<div class="dropdown">
<button id="myBtn" class="dropbtn">Dropdown</button>
<div id="myDropdown" class="dropdown-content">
<a href="#home">Home</a>
<a href="#about">About</a>
<a href="#contact">Contact</a>
</div>
</div>
<script>
// Get the button, and when the user clicks on it, execute myFunction
document.getElementById("myBtn").onclick = function() {myFunction()};
// myFunction toggles between adding and removing the show class, which is used to hide and show the dropdown content
function myFunction() {
document.getElementById("myDropdown").classList.toggle("show");
}
// Close the dropdown if the user clicks outside of it
window.onclick = function(event) {
if (!event.target.matches('.dropbtn')) {
var dropdowns = document.getElementsByClassName("dropdown-content");
var i;
for (i = 0; i < dropdowns.length; i++) {
var openDropdown = dropdowns[i];
if (openDropdown.classList.contains('show')) {
openDropdown.classList.remove('show');
}
}
}
}
</script>
</body>
</html>
event.target.matches
在Internet Explorer中不存在。 Element.matches()
的Browser Compatibility表顯示,從IE 9開始,可以使用此方法,但使用非標准名稱msMatchesSelector
。
因此,請嘗試:
window.onclick = function(event) {
matches = event.target.matches ? event.target.matches('.dropbtn') : event.target.msMatchesSelector('.dropbtn');
if (!matches) {
var dropdowns = document.getElementsByClassName("dropdown-content");
var i;
for (i = 0; i < dropdowns.length; i++) {
var openDropdown = dropdowns[i];
if (openDropdown.classList.contains('show')) {
openDropdown.classList.remove('show');
}
}
}
}
您可以使用jQuery庫獲取跨瀏覽器兼容的代碼,這些代碼也可以在IE中使用。
就您而言,用以下代碼替換<script>
:
<script src="//code.jquery.com/jquery-1.12.3.min.js"></script>
<script>
$(function(){
$(document).click(function(event){
if(!$(event.target).is('#myBtn')
&& !$(event.target).is('#myDropdown a')) {
$('#myDropdown').hide();
}
if($(event.target).is('#myBtn')) {
$('#myDropdown').toggle();
}
});
});
</script>
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