In JavaScript, there are some meaningless variable/value, which means, in logic expression, those meaningless variables will return false for ever.
Those meaningless variables include: NULL, 0, false, NAN, “”. and also the special “undefined”
Summary on 20080613: the meaningless variable in JavaScript
最新推荐文章于 2024-07-24 11:14:26 发布
本文介绍了JavaScript中被视为逻辑表达式中永远为假的无效变量，包括NULL、0、false、NAN、空字符串及特殊值undefined，并解释了它们在编程实践中的意义。
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