Typescript - 逗号运算符左侧未使用，没有副作用 - 如何在hookrouter的路由中使用常量代替字符串？

Posted 2021-04-26

import React from "react";
import Users from "./components/Users";
import Contact from "./components/Contact";
import About from "./components/About";
const routes = {
  "/": () => <Users />,
  "/about": () => <About />,
  "/contact": () => <Contact />
};
export default routes;

请问如何在路由中使用常量代替字符串，如下图所示。

const root = "/";

const routes = {
  `${root}`: () => <Users />,
};

当我尝试上面的代码时，我得到了以下错误。

Left side of comma operator is unused and has no side effects

答案

语法为 计算后的属性名称 在一个对象的字面意思是 [someExpression]，不 `${someExpression}`:

const root = "/";

const routes = {
  [root]: () => <Users />,
};

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