带有下拉菜单的动态导航栏会干扰下拉菜单元素的宽度
JavaScript: dynamic navigation bar with dropdown disturbs dropdown element widths
感谢您考虑这个问题。
代码可以在GitHub上找到,这里。
这里发生了一些事情,所以在我们进入代码之前,我想对它进行一些解释。
我有一个makeNavigation函数,它接受三个参数来制作导航栏:用于导航栏的项目数组,导航栏应该放置的元素id,以及大小。
在不包含页边距的情况下效果很好。然而,一旦空白的两行没有注释,那么下拉内容就会比它应该的大得多。想法吗?
另外,当窗口尽可能小地折叠,而不是只有一个下拉元素,"Home"和下拉栏是堆叠的。我为什么/怎样才能纠正这个问题?
注意:我的源代码W3 CSS和hover-master
对于变量,我们有pages和"sizes"
var pages = ["HOME","ABOUT","PAGE3","PAGE4","PAGE5","PAGE6","PAGE7","PAGE8"];
var extraSmall, small, medium, large;
extraSmall = 610;
small = 700;
medium = 800;
large = 1250;
功能:function getSizeInText(size) {
if (size > large) {
return("large")
};
if (extraSmall < size && size < medium) {
return("small")
};
if (medium <= size && size <= large) {
return("medium")
};
if (size <= extraSmall) {
return("extraSmall")
}
}
function makeNavigation(navArray, navID, size) {
var theID = document.getElementById(navID);
var mar = 8;
var pad = 2;
theID.innerHTML = null;
// theID.style.marginRight = mar + "%";
// theID.style.marginLeft = mar + "%";
theID.style.marginTop = mar/4 + "%";
if (size == "extraSmall") {
var numNav = navArray.length;
theID.innerHTML += '<li class="w3-dropdown-hover w3-centered" '+
'style="width:' + spaceAllocated + '%" >' +
'<a class="hvr-reveal navFont">' +
'<i class="fa fa-bars"></i></a>' +
'<ul id="dropDownContent" class="w3-dropdown-content" style="width:'+ spaceAllocated +'%">' +
'</ul>' + '</li>';
for (var i = 0; i < numNav; i++ ) {
document.getElementById('dropDownContent').innerHTML+=
'<li style="width:' +
(100 - 2*pad) + '%">'+
'<a class="hvr-reveal navFont" href="' + navArray[i].toLowerCase() + '.html">' +
navArray[i] + '</a></li>';
}
}
if (size == "small") {
var numNav = navArray.length;
var spaceAllocated = (100 ) / 2;
for (var i = 0; i < 1; i++) {
theID.innerHTML +=
'<li style = "width:' +
spaceAllocated +
'%"><a class="hvr-reveal navFont"' +
' href="' +
navArray[i].toLowerCase() +
'.html">' +
navArray[i] + '</a></li>';
};
theID.innerHTML += '<li class="w3-dropdown-hover w3-centered" '+
'style="width:' + spaceAllocated + '%" >' +
'<a class="hvr-reveal navFont">' +
'<i class="fa fa-bars"></i></a>' +
'<ul id="dropDownContent" class="w3-dropdown-content" style="width:'+ spaceAllocated +'%">' +
'</ul>' + '</li>';
for (var i = 1; i < numNav; i++ ) {
document.getElementById('dropDownContent').innerHTML+=
'<li style="width:' +
(100 - 2*pad) + '%">'+
'<a class="hvr-reveal navFont" href="' + navArray[i].toLowerCase() + '.html">' +
navArray[i] + '</a></li>';
}
}
if (size == "medium") {
var numNav = navArray.length;
var half = Math.floor(numNav/2);
var spaceAllocated = (100 ) / (half+1);
for (var i = 0; i < half; i++) {
theID.innerHTML +=
'<li style = "width:' +
spaceAllocated +
'%"><a class="hvr-reveal navFont"' +
' href="' +
navArray[i].toLowerCase() +
'.html">' +
navArray[i] + '</a></li>';
};
theID.innerHTML += '<li class="w3-dropdown-hover w3-centered" '+
'style="width:' + spaceAllocated + '%" >' +
'<a class="hvr-reveal navFont">' +
'<i class="fa fa-bars"></i></a>' +
'<ul id="dropDownContent" class="w3-dropdown-content" style="width:'+ spaceAllocated +'%">' +
'</ul>' + '</li>';
for (var i = half; i < numNav; i++ ) {
document.getElementById('dropDownContent').innerHTML+=
'<li style="width:' +
(100 - 2*pad) + '%">'+
'<a class="hvr-reveal navFont" href="' + navArray[i].toLowerCase() + '.html">' +
navArray[i] + '</a></li>';
}
};
if (size == "large") {
var numNav = navArray.length;
var spaceAllocated = (100 ) / numNav;
for (var i = 0; i < numNav; i++) {
theID.innerHTML +=
'<li style = "width:' +
spaceAllocated +
'%"><a class="hvr-reveal navFont"' +
' href="' +
navArray[i].toLowerCase() +
'.html">' +
navArray[i] + '</a></li>';
};
};
}
然后在HTML中:
<div class="w3-container w3-section"><ul id="navBar" class="w3-navbar w3-center"></ul></div>
<script type="text/javascript">
var windowWidth;
var size;
jQuery(document).ready(function(){
windowWidth = jQuery(window).width();
size = getSizeInText(windowWidth);
if (windowWidth > large) {}
if (windowWidth < medium) {}
if (medium <= windowWidth && windowWidth <= large) {}
});
jQuery(window).resize(function () {
windowWidth = jQuery(window).width();
size = getSizeInText(windowWidth);
if (windowWidth > large) {
makeNavigation(pages, "navBar", size);
}
if (windowWidth < medium) {
makeNavigation(pages, "navBar", size);
}
if (medium <= windowWidth && windowWidth <= large) {
makeNavigation(pages, "navBar", size);
}
});
</script>
<标题> 更新programmer5000给出了这个特殊问题的解决方案。然而,当不使用w3-css时,同样的解决方案不起作用。怎么会?
/* Drop down content */
li a, .dropbtn {
display: inline-block;
text-align: center;
text-decoration: none;
}
li.dropdown {
display: inline-block;
}
.dropdown-content {
display: none;
position: absolute;
text-align: center;
width: inherit;
z-index: 1;
}
.dropdown-content a {
text-decoration: none;
display: block;
}
.dropdown:hover .dropdown-content {
display: block;
}
<nav id ='navigation-bar'>
<ul>
<li><a href="#"> HOME </a></li>
<li class="dropdown">
<a class="dropbtn">TEST</a>
<div class="dropdown-content">
<a>1</a>
<a>2</a>
<a>3</a>
</div>
</li>
</ul>
</nav>
标题>赏金说:
2.)为什么当窗口具有最小宽度时,"HOME"会堆叠在下拉栏的顶部。
结果是这是一个特异性问题。试试这个:
@media screen and (max-width: 600px){
.w3-navbar li:not(.w3-opennav) {
width: 50% !important;
float: left !important;
}
}
那将解决那个问题。
为# 1:1.)与主导航栏元素和下拉栏元素的不同宽度
#dropDownContent li {
width: 100% !important;
}
.w3-dropdown-hover:hover .w3-dropdown-content{
position: initial;
}
对于两者来说,这只是一些奇怪的绝对位置和一些特异性问题。总共12行CSS!只需将此粘贴在<head>
末尾的样式标签中,并在评论中提及此问题或我(programmer5000)
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