The correct syntax for writing comments in JavaScript

If you want your tools to work with you, use JSDoc. It is what Intellisense draws from. It enables TypeScript-like type checking regardless of whether or not you’re actually using TypeScript.

Example from my PDW :

/**
 * Singleton pattern.
 * @returns the PDW
 */
public static getInstance(): PDW {
    if (!PDW.instance) {
        PDW.instance = new PDW();
    }
    return PDW.instance;
}

Source

Sources

Jsdoc cheatsheet

Use JSDoc: Index