摘要：Object Literal Extensions.md Declaring price and quantity twice is kind of redundant,but es6 provides a shorthand making writing this simpler. ES6 als 阅读全文

摘要：Rest and Spread Operators.md Why we need rest and spread operators? instanceof The instanceof operator tests whether the prototype property of a const 阅读全文

摘要：sublime preview html.md open In Browser what should we do if we want to preview html file in our browser? We can install a plugin called "Open In Brow 阅读全文

摘要：Default Function Parameters.md Default Function Parameters In ES5,if the argument is not specified,its value would be set to undefined . if we do this 阅读全文

摘要：Arrow Function.md Arrow Functions The basic syntax of an arrow function is as follows The code means : How create IIFEs using arrow function? Why we u 阅读全文

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摘要：variable declarations : let, const,and block scope why we redefine the way about declarations? function scope The next we can use IIFE to check var va 阅读全文