JSDoc仅描述对象值

Question

说我有这样的反对意见：

const Companies = {Mazda : {revenue:50000, employees:1000},
Honda: {revenue: 102324, employees:2031}}

此功能：

const totalRevenue = (companies) => 
Object.values(companies)
.map(companyObject => companyObject.revenue)
.reduce((total, companyRevenue)=> total + companyRevenue)

我如何使用JSDoc来告诉函数 totalRevenue companies对象是它拥有的每个键的对象，其值类型为{revenue: Number, employees: Number}

我对WebStorm可以理解的东西特别感兴趣。

Answer 1

您可以使用{Object.<string, number>}表示法描述对象中的每个键。在此处查看更多语法示例：http://usejsdoc.org/tags-type.html

针对您的特定情况：

/**
 * @param {Object.<string, {revenue: number, employees: number}>} companies
 */
const totalRevenue = (companies) => 
Object.values(companies)
.map(companyObject => companyObject.revenue)
.reduce((total, companyRevenue)=> total + companyRevenue)