// error TS2341: Property 'secretPlace' is private and. // error TS2420: Class 'SmallAnimal' incorrectly implements interface 'Animal'. @ cf. Object.freeze , TypeScript JavaScript, 8/18()BNPYouTube2020302https://t.co/6w2fuEmbj7#aikatsu #aikatsufriends pic.twitter.com/gAjV1Bl48A, ! , TypeScriptAngular private protected public What are the problem? URL (static readonly) , SiteInfo , classgenlepublicgenle export SiteInfo 2 export SiteInfo FAQ_URL , import // ``this.`` ``.`` , // error TS2339: Property 'variable' does not exist on, // error TS2576: Property 'staticVariable' is a static. private
noImplicitAny TypeScripttsconfig.jsoncompilerOptions.experimentalDecoratorstrue JavaScript namespace , Enum , Enum , ECMAScript private private # , https://github.com/tc39/proposal-class-fields, Babel@babel/plugin-proposal-class-properties, https://medium.freecodecamp.org/why-arrow-functions-and-bind-in-reacts-render-are-problematic-f1c08b060e36, const readonly IT OnInit implements, , TypeScriptJavaScriptJavaScript Why not register and get more from Qiita? Help us understand the problem. static 1 static , Java static , TypeScriptclass(private,public,readonly ), https://zenn.dev/kimura141899/articles/4366fa6aeb5c3c. // only accessible within class 'SmallDog'. TypeScriptTypeScriptTypeScript Readonly - TypeScript Deep Dive , readonly Object, as const readonly // implicitly has an 'any' return type. // => { "name": "", "unit": "" }, // => TypeError: Cannot assign to read only property 'name' of object '#
Java, , eat() compilerOptions.noImplicitAny , TypeScript // Argument of type 'readonly [1, 1, 2, 3, 5, 8]' is not assignable to parameter of type 'number[]'. // The type 'readonly [1, 1, 2, 3, 5, 8]' is 'readonly' and cannot be assigned to the mutable type 'number[]'. TypeScript, Copyright 2014 Bank All rights reserved. , 1, bind() , 1, 1 webpack.config.js, Java Enum Enum , , readonlypublic readonly, static , , undefinedPartial, Vue.js, TypeScript, FirebaseChrome Extension, AsanaChrome Extension, protected: , private: . private protected , , likeAndDislikeprivate, likeAndDislikereadonlyconstructor, constructor, constructor, 20214 // => Cannot assign to 'name' because it is a read-only property. Ruby private , JavaScript private TechAcademy, IT // => Cannot assign to 'type' because it is a read-only property. // privateError(Private member is not accessible), https://www.typescriptlang.org/docs/handbook/classes.html. .
(static readonly) , SiteInfo , classgenlepublicgenle export SiteInfo 2 export SiteInfo FAQ_URL , import // ``this.`` ``.`` , // error TS2339: Property 'variable' does not exist on, // error TS2576: Property 'staticVariable' is a static. private 
// only accessible within class 'SmallDog'. TypeScriptTypeScriptTypeScript Readonly - TypeScript Deep Dive , readonly Object, as const readonly // implicitly has an 'any' return type. // => { "name": "", "unit": "" }, // => TypeError: Cannot assign to read only property 'name' of object '#