jquery - elem.is (':checked' ) vs elem.prop ('checked' )

Question

这个问题已经有答案了:

Which way to test if an element is checked is better? .is(':checked') or .prop('checked') (3 个回答)

已关闭 6 年前。

正如标题所示，elem.is(':checked') 之间有什么区别？和elem.prop('checked') .

我个人使用elem.is(':checked')因为函数is解释说我要返回 bool 值。

我什么时候应该选择其中之一？为什么？

Answer 1

答案基于This SO Question .

如果您使用的是 1.6.0 或更高版本，prop('checked') 是最直接的 jQuery 方法。 jQuery 不必解析和处理选择器来确定要做什么。

Note: The degree to which prop is more direct than is varies by browser. prop isn't just a direct check of a property, it does go through a couple of levels of indirection first; and is isn't necessarily hugely complex: On WebKit browsers, for instance, is can be fairly direct as WebKit provides a function to test whether an element matches a selector, and supports :checked natively; on Firefox (and, I suspect, IE), is results in a huge number of function calls as this seemingly-simple selector works its way through the guts of Sizzle.

测试结果: jQuery prop('checked') vs. is(':checked')