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返回一个所有当前可用样式表集的实时列表。
Syntax
sets = document.styleSheetSets
在返回时，sets 是一个可用的样式表集的列表。
Example
Given an <ul> (list) element with the ID "sheetList", you can populate it with the names of all the available style sheet sets with code like this:
var list = document.getElementById("sheetList");
var sheets = document.styleSheetSets;
list.innerHTML = "";
for (var i = 0; i < sheets.length; i++) {
var item = document.createElement("li");
item.innerHTML = sheets[i];
list.appendChild(item);
}
Notes
The list of available style sheet sets is constructed by enumerating all the style sheets available for the document, in the order in which they're listed in the document.styleSheets attribute, adding the title of each style sheet that has a title to the list. Duplicates are dropped from the list (using a case-sensitive comparison).