添加或修改 属性 const person = {} person. オブジェクト初期化の際に使える「名前」は、以下の四種類ということになります。. Method definitions. How to Set Dynamic Property Keys with ES6 - SamanthaMing.com Destructuring assignment - JavaScript | MDN 1 min read. computed property names typescript With ES6's Shorthand Method Names, you can omit the function keyword completely. missing in computed property name - astiempo.org Dynamic object keys (computed property names) are awesome! 動的にプロパティ名を設定できるようになりました。（現代 … この動的なプロパティ名、名前を “computed property name” といいます。. document['createElement']('pre') You can also retrieve the return values as an array: var a = f (); console.log ("A is " + a); In this case, a is an array containing the values 1 and 2. JavaScript function: get: Computed property names. Introduction. ', or even ' ' (a space). ? What that means is that code that used to look like this, Both Shorthand Properties and Shorthand Method Names are just syntactic sugar over the previous ways we used to add properties to an object. computed property names ECMAScript 6, MDN. For example: In this example, the [propName] is a computed property of the rank object. Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. live music ludington, mi Twitter. Javascript: Computed Property Names (ES6) | by tejesh p That allows you to put an expression in brackets [], that will be computed and used as the property name. This is reminiscent of the bracket notation of the property accessor syntax, which you may have used to read and set properties already. Now you can use a similar syntax in object literals, too: To create a computed property, we need to add a computed property to our component object, much like the methods . JavaScript: Computed property names - techtutorialsx Computed Property Names This feature in ES2015 allows you to create property names dynamically on an object. A function that is a property on an object is called a method. Like an object literal, you can use computed properties for getters and setters of a class. For example: The get [name] is a computed property name of a getter of the Person class. At runtime, when you access the fullName property, the person object calls the getter and returns the full name. let and const bindings (complete) ECMAScript 6, MDN.
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