Vue自定义插件报错

Vue自定义插件遇到的问题

// tools.js
class Tools {
	send(){
		console.log("模块化开发测试");
	}
}

Tools.install = function(Vue){
	Vue.prototype.tools = new Tools();
}

module.exports = Tools;

//main.js
import tools from "./plug/tools.js";
Vue.use(tools);

这样写插件module.exports = Tools; 导致引入报错, Uncaught TypeError: Cannot assign to read only property 'exports' of object '#