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require-param-name.md

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require-param-name

Requires that all @param tags have names.

The @param tag requires you to specify the name of the parameter you are documenting. You can also include the parameter's type, enclosed in curly brackets, and a description of the parameter.

JSDoc

Options

contexts

Set this to an array of strings representing the AST context (or an object with context and comment properties) where you wish the rule to be applied. Overrides the default contexts (see below). Set to "any" if you want the rule to apply to any jsdoc block throughout your files (as is necessary for finding function blocks not attached to a function declaration or expression, i.e., @callback or @function (or its aliases @func or @method) (including those associated with an @interface).

See the "AST and Selectors" section of our README for more on the expected format.

Context and settings

Context ArrowFunctionExpression, FunctionDeclaration, FunctionExpression; others when contexts option enabled
Tags param
Aliases arg, argument
Recommended true
Options contexts

Failing examples

The following patterns are considered problems:

/**
 * @param
 */
function quux (foo) {

}
// Message: There must be an identifier after @param type.

/**
 * @param {string}
 */
function quux (foo) {

}
// Message: There must be an identifier after @param tag.

/**
 * @param {string}
 */
function quux (foo) {

}
// "jsdoc/require-param-name": ["error"|"warn", {"contexts":["any"]}]
// Message: There must be an identifier after @param tag.

/**
 * @function
 * @param {string}
 */
// "jsdoc/require-param-name": ["error"|"warn", {"contexts":["any"]}]
// Message: There must be an identifier after @param tag.

/**
 * @callback
 * @param {string}
 */
// "jsdoc/require-param-name": ["error"|"warn", {"contexts":["any"]}]
// Message: There must be an identifier after @param tag.

/**
 * @param foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"tagNamePreference":{"param":false}}}
// Message: Unexpected tag `@param`

Passing examples

The following patterns are not considered problems:

/**
 * @param foo
 */
function quux (foo) {

}

/**
 * @param foo
 */
function quux (foo) {

}
// "jsdoc/require-param-name": ["error"|"warn", {"contexts":["any"]}]

/**
 * @param {string} foo
 */
function quux (foo) {

}

/**
 * @function
 * @param
 */

/**
 * @callback
 * @param
 */

/**
 * @param {Function} [processor=data => data] A function to run
 */
function processData(processor) {
  return processor(data)
}

/** Example with multi-line param type.
*
* @param {function(
*   number
* )} cb Callback.
*/
function example(cb) {
  cb(42);
}