# valid-jsdoc

此规则是 ESLint v5.10.0 中的 deprecated。

JSDoc 从 JavaScript 代码中特殊格式的注释生成应用程序编程接口 (API) 文档。例如，这是一个函数的 JSDoc 注释：

/**
 * Add two numbers.
 * @param {number} num1 The first number.
 * @param {number} num2 The second number.
 * @returns {number} The sum of the two numbers.
 */
function add(num1, num2) {
    return num1 + num2;
}

如果由于输入错误而导致注释无效，则文档将不完整。

如果因为修改函数定义时注释没有更新而导致注释不一致，那么读者可能会感到困惑。

# 规则详情

此规则强制执行有效且一致的 JSDoc 注释。它报告以下任何问题：

缺少参数标签：@arg、@argument 或 @param
与函数或方法相比，注释中参数名称的顺序不一致
缺少返回标签：@return 或 @returns
缺少参数或返回类型
缺少参数或返回描述
语法错误

此规则不会报告缺少的类、函数或方法的 JSDoc 注释。

**注意：**此规则不支持 Google Closure 文档工具的所有用例。因此，某些代码（例如 (/**number*/ n => n * 2);）将被标记为缺少适当的函数 JSDoc 注释，即使 /**number*/ 旨在作为函数的类型提示而不是文档块。如果您以这种方式使用类型提示，我们不建议使用此规则。

此规则的错误代码示例：

/*eslint valid-jsdoc: "error"*/

// expected @param tag for parameter num1 but found num instead
// missing @param tag for parameter num2
// missing return type
/**
 * Add two numbers.
 * @param {number} num The first number.
 * @returns The sum of the two numbers.
 */
function add(num1, num2) {
    return num1 + num2;
}

// missing brace
// missing @returns tag
/**
 * @param {string name Whom to greet.
 */
function greet(name) {
    console.log("Hello " + name);
}

// missing parameter type for num1
// missing parameter description for num2
/**
 * Represents a sum.
 * @constructor
 * @param num1 The first number.
 * @param {number} num2
 */
function sum(num1, num2) {
    this.num1 = num1;
    this.num2 = num2;
}

此规则的正确代码示例：

/*eslint valid-jsdoc: "error"*/
/*eslint-env es6*/

/**
 * Add two numbers.
 * @param {number} num1 The first number.
 * @param {number} num2 The second number.
 * @returns {number} The sum of the two numbers.
 */
function add(num1, num2) {
    return num1 + num2;
}

// default options allow missing function description
// return type `void` means the function has no `return` statement
/**
 * @param {string} name Whom to greet.
 * @returns {void}
 */
function greet(name) {
    console.log("Hello " + name);
}

// @constructor tag allows missing @returns tag
/**
 * Represents a sum.
 * @constructor
 * @param {number} num1 The first number.
 * @param {number} num2 The second number.
 */
function sum(num1, num2) {
    this.num1 = num1;
    this.num2 = num2;
}

// class constructor allows missing @returns tag
/**
 * Represents a sum.
 */
class Sum {
    /**
     * @param {number} num1 The first number.
     * @param {number} num2 The second number.
     */
    constructor(num1, num2) {
        this.num1 = num1;
        this.num2 = num2;
    }
}

// @abstract tag allows @returns tag without `return` statement
class Widget {
    /**
    * When the state changes, does it affect the rendered appearance?
    * @abstract
    * @param {Object} state The new state of the widget.
    * @returns {boolean} Is current appearance inconsistent with new state?
    */
    mustRender (state) {
        throw new Error("Widget subclass did not implement mustRender");
    }
}

// @override tag allows missing @param and @returns tags
class WonderfulWidget extends Widget {
    /**
     * @override
     */
    mustRender (state) {
        return state !== this.state; // shallow comparison
    }
}

# 选项

此规则有一个对象选项：

"prefer" 强制由一个对象指定的一致的文档标签，其属性意味着而不是键使用值（例如，"return": "returns" 意味着而不是 @return 使用 @returns）
"preferType" 强制由一个对象指定的一致类型字符串，其属性意味着而不是键使用值（例如，"object": "Object" 意味着而不是 object 使用 Object）
"requireReturn" 需要一个返回标签：true（默认）即使函数或方法没有 return 语句（此选项值不适用于构造函数） false 当且仅当函数或方法具有 return 语句或返回值时，例如async 函数（此选项值确实适用于构造函数）
"requireReturnType": false 允许在返回标签中缺少类型
"matchDescription" 指定（作为字符串）一个正则表达式来匹配每个 JSDoc 注释中的描述（例如，".+" 需要描述；此选项不适用于参数或返回标签中的描述）
"requireParamDescription": false 允许在参数标签中缺少描述
"requireReturnDescription": false 允许在返回标签中缺少描述
"requireParamType": false 允许在参数标签中缺少类型

# prefer

带有示例 "prefer": { "arg": "param", "argument": "param", "class": "constructor", "return": "returns", "virtual": "abstract" } 选项的此规则的其他错误代码示例：

/*eslint valid-jsdoc: ["error", { "prefer": { "arg": "param", "argument": "param", "class": "constructor", "return": "returns", "virtual": "abstract" } }]*/
/*eslint-env es6*/

/**
 * Add two numbers.
 * @arg {int} num1 The first number.
 * @arg {int} num2 The second number.
 * @return {int} The sum of the two numbers.
 */
function add(num1, num2) {
    return num1 + num2;
}

/**
 * Represents a sum.
 * @class
 * @argument {number} num1 The first number.
 * @argument {number} num2 The second number.
 */
function sum(num1, num2) {
    this.num1 = num1;
    this.num2 = num2;
}

class Widget {
    /**
     * When the state changes, does it affect the rendered appearance?
     * @virtual
     * @argument {Object} state The new state of the widget.
     * @return {boolean} Is current appearance inconsistent with new state?
     */
    mustRender (state) {
        throw new Error("Widget subclass did not implement mustRender");
    }
}

# preferType

带有示例 "preferType": { "Boolean": "boolean", "Number": "number", "object": "Object", "String": "string" } 选项的此规则的其他错误代码示例：

/*eslint valid-jsdoc: ["error", { "preferType": { "Boolean": "boolean", "Number": "number", "object": "Object", "String": "string" } }]*/
/*eslint-env es6*/

/**
 * Add two numbers.
 * @param {Number} num1 The first number.
 * @param {Number} num2 The second number.
 * @returns {Number} The sum of the two numbers.
 */
function add(num1, num2) {
    return num1 + num2;
}

/**
 * Output a greeting as a side effect.
 * @param {String} name Whom to greet.
 * @returns {void}
 */
function greet(name) {
    console.log("Hello " + name);
}

class Widget {
    /**
     * When the state changes, does it affect the rendered appearance?
     * @abstract
     * @param {object} state The new state of the widget.
     * @returns {Boolean} Is current appearance inconsistent with new state?
     */
    mustRender (state) {
        throw new Error("Widget subclass did not implement mustRender");
    }
}

# requireReturn

带有 "requireReturn": false 选项的此规则的其他错误代码示例：

/*eslint valid-jsdoc: ["error", { "requireReturn": false }]*/

// unexpected @returns tag because function has no `return` statement
/**
 * @param {string} name Whom to greet.
 * @returns {string} The greeting.
 */
function greet(name) {
    console.log("Hello " + name);
}

// add @abstract tag to allow @returns tag without `return` statement
class Widget {
    /**
     * When the state changes, does it affect the rendered appearance?
     * @param {Object} state The new state of the widget.
     * @returns {boolean} Is current appearance inconsistent with new state?
     */
    mustRender (state) {
        throw new Error("Widget subclass did not implement mustRender");
    }
}

带有 "requireReturn": false 选项的此规则的附加正确代码示例：

/*eslint valid-jsdoc: ["error", { "requireReturn": false }]*/

/**
 * @param {string} name Whom to greet.
 */
function greet(name) {
    console.log("Hello " + name);
}

# requireReturnType

带有 "requireReturnType": false 选项的此规则的附加正确代码示例：

/*eslint valid-jsdoc: ["error", { "requireReturnType": false }]*/

/**
 * Add two numbers.
 * @param {number} num1 The first number.
 * @param {number} num2 The second number.
 * @returns The sum of the two numbers.
 */
function add(num1, num2) {
    return num1 + num2;
}

# requireParamType

带有 "requireParamType": false 选项的此规则的附加正确代码示例：

/*eslint valid-jsdoc: ["error", { "requireParamType": false }]*/

/**
 * Add two numbers.
 * @param num1 The first number.
 * @param num2 The second number.
 * @returns {number} The sum of the two numbers.
 */
function add(num1, num2) {
    return num1 + num2;
}

# matchDescription

带有示例 "matchDescription": ".+" 选项的此规则的其他错误代码示例：

/*eslint valid-jsdoc: ["error", { "matchDescription": ".+" }]*/

// missing function description
/**
 * @param {string} name Whom to greet.
 * @returns {void}
 */
function greet(name) {
    console.log("Hello " + name);
}

# requireParamDescription

带有 "requireParamDescription": false 选项的此规则的附加正确代码示例：

/*eslint valid-jsdoc: ["error", { "requireParamDescription": false }]*/

/**
 * Add two numbers.
 * @param {int} num1
 * @param {int} num2
 * @returns {int} The sum of the two numbers.
 */
function add(num1, num2) {
    return num1 + num2;
}

# requireReturnDescription

带有 "requireReturnDescription": false 选项的此规则的附加正确代码示例：

/*eslint valid-jsdoc: ["error", { "requireReturnDescription": false }]*/

/**
 * Add two numbers.
 * @param {number} num1 The first number.
 * @param {number} num2 The second number.
 * @returns {number}
 */
function add(num1, num2) {
    return num1 + num2;
}

# 何时不使用

如果您不使用 JSDoc，那么您可以安全地关闭此规则。

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