IntelliJ IDEA 中 JSDoc 类型的 map-like object

Question

Following assignment

/**
 * @type {Object<string, string>}
 */
const x = { a: 'b' };

IDEA marks with warning

Initializer type {a: string} is not assignable to variable type Object<string, string>

What is the correct way to type-annotate a map-like object so that IDEA can understand it?

Answer 1

Using Object<string, string> is a right way to go , and

/**
 * @type {Object<string, string>}
 */
const x = { a: "1" };

as well as

/**
 * @type {Object.<string, string>}
 */
const x = { a: "1" };

work fine for me in 2021.2 You can also use the Google Closure Compiler record types like

*
 * @type {{a: string}}
 */
const y = { a: "1" };