ts es6异常捕获装饰器

App.ts

import Catch from './catched'

const getDataErrorHandler = (error, ctx) => {
  ctx.errorMessage = error.message
}


class App {
  errorMessage = ''

  componentDidMount() {
     this.getData();
  }
  
  @Catch(getDataErrorHandler)
  async getData() {
    const data = await api.getData() // throws Error
    return data
  }
  
  
  @Catch
  wrongMethod() {
    const a = 10
    a = 20  // throws TypeError
  }
}

catched.ts

function Catch(localHandler) {
    return function(target, key, descriptor) {
        const originalMethod = descriptor.value

        descriptor.value = async function(...args) {
            try {
                return await originalMethod.apply(this, args)
            } catch (error) {
                const { handler } = catchDecoratorStore
                
                if (localHandler) {
                    localHandler.call(null, error, this)
                } else if(handler) {
                    handler.call(null, error, this)
                } else {
                    console.warn(error.message)
                }
            }
        }

        return descriptor
    }
}

export default Catch