@param

Tag Kind

Block

TSDoc Reference

@param

The @param tag is used to document a parameter of a function or method.

Example

/**
 * @param a - the first number
 * @param b - the second number
 */
export function sum(a: number, b: number) {
    return a + b;
}

Object Literals

If the type of a parameter is an object literal type, a union containing an object literal type, or an intersection containing an object literal type, property names may be separated by . to add a comment to a single level of a nested property.

/**
 * @param options - documentation for the whole parameter
 * @param options.value - documentation for the `value` property
 * @param options.nested.value - NOT supported
 */
export function configure(
    options: { value: string; nested: { value: string } } | undefined
) {}

Destructured Parameters

If your function uses destructured parameters, TypeDoc will attempt to infer the parameter name from your usage of the @param tag. For it to be successful, all parameters must be documented. If TypeDoc fails to infer the name of the destructured parameter, it will be documented as __namedParameters.

/**
 * @param options - docs
 */
export function configure({ value }: { value: string }) {}

// will be documented as if written as
export function configure(options: { value: string }) {}

TSDoc Compatibility

The TSDoc standard requires that the @param tag not include types and that the parameter name must be followed by a hyphen to separate it from the description. For improved compatibility with projects using TypeScript type annotations in JavaScript files and the JSDoc @param tag, TypeDoc does not enforce these requirements. The following @param tags will all be passed in the same way by TypeDoc.

/**
 * @param test - description
 * @param test description
 * @param {string} test - description
 * @param {string} test description
 */