我想使用 CMS (https://stackoverflow.com/a/1933623/1336540)的 getElementsByClassName 函数调用,该函数使列表可折叠并且目前仅与 getElementById 一起使用 - http://acmeous.blogspot。 com/2011/03/how-to-create-easy-collapsible-and.html
因为同一个类可以有多个 HTML 元素,CMS 使用循环来查找和处理它们。我试图调整他的代码,但由于循环使用它超出了我的 JS 能力。
原始CMS函数调用:
function toggle_visibility(className) {
var elements = getElementsByClassName(document, className),
n = elements.length;
for (var i = 0; i < n; i++) {
var e = elements[i];
if(e.style.display == 'block') {
e.style.display = 'none';
} else {
e.style.display = 'block';
}
}
}
如何转换此函数调用以将 getElementById 替换为 CMS getElementsByClassName?
if (window.addEventListener) {
window.addEventListener("load", function()
{makeCollapsible(document.getElementById('listCategories'), 1);}, false);
} else if (window.attachEvent) {
window.attachEvent("onload", function()
{makeCollapsible(document.getElementById('listCategories'), 1);});
} else {
window.onload = function()
{makeCollapsible(document.getElementById('listCategories'), 1);};
}
感谢大家阅读本文并试图帮助我!
编辑:函数makeCollapsible:
function makeCollapsible(listElement,listState){
if(listState!=null) defaultState=listState;
// removed list item bullets and the sapce they occupy
listElement.style.listStyle='none';
listElement.style.marginLeft='0';
listElement.style.paddingLeft='0';
// loop over all child elements of the list
var child=listElement.firstChild;
while (child!=null){
// only process li elements (and not text elements)
if (child.nodeType==1){
// build a list of child ol and ul elements and show/hide them
var list=new Array();
var grandchild=child.firstChild;
while (grandchild!=null){
if (grandchild.tagName=='OL' || grandchild.tagName=='UL'){
if(defaultState==1) grandchild.style.display='block';
else grandchild.style.display='none';
list.push(grandchild);
}
grandchild=grandchild.nextSibling;
}
// add toggle buttons
if(defaultState==1) {
var node=document.createElement('img');
node.setAttribute('src',expandedImage);
node.setAttribute('class','collapsibleOpen');
node.style.marginRight="5px";
node.style.display = "inline";
node.onclick=createToggleFunction(node,list);
child.insertBefore(node,child.firstChild);
} else {
var node=document.createElement('img');
node.setAttribute('src',collapsedImage);
node.setAttribute('class','collapsibleClosed');
node.style.marginRight="5px";
node.style.display = "inline";
node.onclick=createToggleFunction(node,list);
child.insertBefore(node,child.firstChild);
}
}
child=child.nextSibling;
}
}