Decorator babel 与 typescript 兼容

decorator.js

export function decoratorName() {
  return function(target, prop, descriptor) {
    if (descriptor) {
      if (descriptor.value) {
        // Typescript & @decorator method() { }
        const originFunction = descriptor.value;
        descriptor.value = function(...args) {
          // @TODO:
          return originFunction(...args);
        };
      }
      // Babel only: @decorator method = () => {}
      const { initializer } = descriptor;
      descriptor.initializer = function() {
        const originFunction = initializer.call(this);
        return function(...args) {
          return originFunction(...args);
        };
      };
    }
    return descriptor;
  };
}