js @decorator All In One

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js @decorator All In One

Decorators for ES6 classes

https://github.com/tc39/proposal-decorators

function deco (target) {
  target.flag = true;
}

@deco
class Test {
  constructor (name = 'Eric') {
    this.name = name;
  }
  getName () {
    return this.name;
  }
  static readName = 'Eric';
}

Test.name;
// 'Test'
Test.readName;
// 'Eric';
Test.flag;
// 

function deco (target) {
  // 原型链
  target.prototype.flag = true;
}

@deco
class Test {
  constructor (name = 'Eric') {
    this.name = name;
  }
}

const test = new Test();

test.name;
//
test.flag;
// 

TypeScript Decorators

https://www.typescriptlang.org/docs/handbook/decorators.html

Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option in your 'tsconfig' or 'jsconfig' to remove this warning.ts(1219)
class Test

function deco (target) {
    target.flag = true;
}
@deco
class Test {
    constructor (name = 'Eric') {
        this.name = name;
    }
    getName () {
        return this.name;
    }
    static readName = 'Eric';
}
console.log('@deco', Test.flag);

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