JS function to generate JSDoc type hint from an object instance

generateJSDocsFromObj.js

export function generateJSDocsFromObj(obj) {
	if (typeof obj !== "object") {
		return typeof obj;
	}
	if (obj instanceof Array) {
		if (obj.length <= 0) {
			return "any[]";
		} else {
			return generateJSDocsFromObj(obj[0]);
		}
	}
	let result = {};
	for (key in obj) {
		result[key] = generateJSDocsFromObj(obj[key]);
	}
	return JSON.stringify(result).replace(/\"/g, "").replace(/\,/g, ";");
}

usage.js

import { generateJSDocsFromObj } from "./generateJSDocsFromObj.js";

/** @type {{a:number;b:{c:{d:string}}}} */
const object = {
	a: 1,
	b: {
		c: {
			d: "hello world"
		}
	}
};


console.log(generateJSDocsFromObj(object)); // {a:number;b:{c:{d:string}}}