Shorthand Property and Method Names in JavaScript | ES6 ES6's "Computed Property Names" feature allows you to have an expression (a piece of code that results in a single value like a variable or function invocation) be computed as a property name on an object. 语法，另外还可以使用 [] 传入一个结果为字符串的表达式。 使用 . Computed Property Names is an ES6 feature which allows the names of object properties in JavaScript object literal notation to be determined dynamically, i.e. JavaScriptのオブジェクトのキーを角カッコ[brackets]で囲う記法 … Usage % of. The Mozilla docs is … Computed Property Names in JavaScript - ui.dev How to Set Dynamic Property Keys with ES6 - SamanthaMing.com Previously, we had to do 2 steps - create the object literal and then use the bracket notation. I am not sure which version and I do not own a Mac myself to provide any more detail. The statement [a, b] = f () assigns the results of the function to the variables in brackets, in order: a is set to 1 and b is set to 2. In this tutorial we will check how use computed property names to create objects with property names that result from computing an expression, as the name implies. Contribute to discountry/ES6-for-React development by creating an account on GitHub. Data is missing for the ES6 computed property names feature. The function we provided will be used as the getter function for the property vm.b: console .log (vm.b) vm.a = 2. console .log (vm.b) You can open the console and play with the example vm yourself. Javascript: Computed Property Names (ES6) | by tejesh p computed property names typescript - marketaf.com この動的なプロパティ名、名前を “computed property name” といいます。. JavaScript function: get: Computed property names. computed property names mdn JavaScript Computed Properties In JavaScript, a setter can be used to execute a function whenever a specified property is attempted to be changed. Using a computed property name var expr = 'foo'; var obj = { get [expr]() { return 'bar'; } }; console.log(obj.foo); // "bar" Smart / self-overwriting / lazy getters. getter - JavaScript | MDN If the computation is expensive to run, consider memoizing it. computed property names mdn generators ECMAScript 6, MDN. windows 11 forcing microsoft account / silent authentication oauth2 / computed property names typescript. Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. This is one of the best features of ES6 I have seen, because it allows you to write more declarative and beautiful code. 添加或修改 属性 const person = {} person. They are called "computed property names" From MDN: Starting with ECMAScript 2015, the object initializer syntax also supports computed property names. ES6+ for React Gitbook. computed property names mdn. Share. 857k 118 118 gold badges 1150 1150 … computed property names ECMAScript 6, MDN. ES2015 | Web | Google Developers Follow edited Jan 16, 2016 at 19:43. 2019-04-17. nam e = '美国队长' 使用 [] 添加或修改 属性 … computed property names typescript

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