jQuery 如何将元素分配给变量？
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How can I assign an element to variable?
提问by Selenir
For example: I want to create shortcut to element array
例如：我想创建元素数组的快捷方式
var $artifacts = $('.game-artifact');
but atm there aren't any elements with such class. Then comes some code, which adds elements. The question is if, after I add these elements will variable $artifacts still refer to them or it will remain null? If so, how I manage to assign a reference to function to a variable?
但是 atm 没有任何具有此类类的元素。然后是一些添加元素的代码。问题是，在我添加这些元素之后，变量 $artifacts 是否仍然引用它们，或者它会保持为空？如果是这样，我如何设法将函数的引用分配给变量？
回答by mareckmareck
回答by hsz
You can wrap it with function which will return current elements:
您可以使用将返回当前元素的函数包装它：
var artifacts = function(){
return $('.game-artifact');
};
var $artifacts = artifacts();
回答by beliha
You should use .get() over accessing the array directly, to avoid out of bound errors.
您应该使用 .get() 直接访问数组，以避免越界错误。
var lists = $("body li");
console.log(lists.length); // returns 20
console.log(lists.get(25)); // returns undefined.
console.log(lists[25]); // Generates an error.