摘要： 1，传统事件模型例：onclick可以被覆盖：document.body.onclick = function(){console.log('num1');}document.body.onclick = function(){console.log('num2');}结果：num2销毁方式：doc... 阅读全文

摘要： “A value is an entity that takes on one of nine types. There are nine types (Undefined, Null, Boolean, String, Number, Object, Reference, List, and Completion).”1，Reference The internal Reference type is not a language data type. The Reference type is used to explain the behaviour of such operator.. 阅读全文