valid-jsdoc

JSDoc 从 JavaScript 代码中经过特殊格式化的注释生成应用编程接口（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;
}
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如果由于输入错误而导致注释无效，则文档将不完整。

🌐 If comments are invalid because of typing mistakes, then documentation will be incomplete.

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。

🌐 If comments are inconsistent because they are not updated when function definitions are modified, then readers might become confused.

规则详情

🌐 Rule Details

此规则强制执行有效且一致的 JSDoc 注释。它会报告以下任何问题：

🌐 This rule enforces valid and consistent JSDoc comments. It reports any of the following problems:

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。

🌐 This rule does not report missing JSDoc comments for classes, functions, or methods.

注意: 该规则并不支持 Google Closure 文档工具的所有使用场景。因此，一些代码如 (/**number*/ n => n * 2); 会被标记为缺少适当的函数 JSDoc 注释，即使 /**number*/ 是用作类型提示而不是函数的文档块。如果你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：

🌐 Examples of incorrect code for this rule:

/*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;
}
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符合此规则的正确代码示例：

🌐 Examples of correct code for this rule:

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

/**
 * 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
    }
}
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选项

🌐 Options

此规则有一个对象选项：

🌐 This rule has an object option:

"prefer" 强制执行由对象指定的一致文档标签，其属性的含义是用值代替键（例如，"return": "returns" 意味着用 @returns 代替 @return）
"preferType" 强制执行由对象指定的一致类型字符串，其属性的含义是用值替代键（例如，"object": "Object" 意味着用 Object 替代 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 函数或方法包含 return 语句或返回一个值，例如 async 函数（此选项值适用于构造函数）
"requireReturnType": false 允许在返回标签中省略类型
"matchDescription" 指定（作为字符串）用于匹配每个 JSDoc 注释中描述的正则表达式（例如，".+" 需要一个描述；此选项不适用于参数或返回标签中的描述）
"requireParamDescription": false 允许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 允许在参数标签中省略类型

prefer

此规则的其他错误代码示例以及示例 "prefer": { "arg": "param", "argument": "param", "class": "constructor", "return": "returns", "virtual": "abstract" } 选项：

🌐 Examples of additional incorrect code for this rule with sample "prefer": { "arg": "param", "argument": "param", "class": "constructor", "return": "returns", "virtual": "abstract" } options:

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

/**
 * Add two numbers.
 * @arg {number} num1 The first number.
 * @arg {number} num2 The second number.
 * @return {number} 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");
    }
}
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preferType

此规则的额外错误代码示例及示例 "preferType": { "Boolean": "boolean", "Number": "number", "object": "Object", "String": "string" } 选项：

🌐 Examples of additional incorrect code for this rule with sample "preferType": { "Boolean": "boolean", "Number": "number", "object": "Object", "String": "string" } options:

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

/**
 * 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");
    }
}
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requireReturn

使用 "requireReturn": false 选项时，该规则的其他错误代码示例：

🌐 Examples of additional incorrect code for this rule with the "requireReturn": false option:

/*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");
    }
}
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此规则使用 "requireReturn": false 选项的额外正确代码示例：

🌐 Example of additional correct code for this rule with the "requireReturn": false option:

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

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

此规则使用 "requireReturnType": false 选项的额外正确代码示例：

🌐 Example of additional correct code for this rule with the "requireReturnType": false option:

/*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;
}
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requireParamType

使用 "requireParamType": false 选项时，此规则的额外正确代码示例：

🌐 Example of additional correct code for this rule with the "requireParamType": false option:

/*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;
}
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matchDescription

此规则的额外错误代码示例，使用示例选项 "matchDescription": ".+"：

🌐 Example of additional incorrect code for this rule with a sample "matchDescription": ".+" option:

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

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

此规则使用 "requireParamDescription": false 选项的额外正确代码示例：

🌐 Example of additional correct code for this rule with the "requireParamDescription": false option:

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

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

此规则使用 "requireReturnDescription": false 选项的额外正确代码示例：

🌐 Example of additional correct code for this rule with the "requireReturnDescription": false option:

/*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;
}
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何时不使用

🌐 When Not To Use It

如果你不使用 JSDoc，那么你可以安全地关闭此规则。

🌐 If you aren’t using JSDoc, then you can safely turn this rule off.

版本

此规则是在 ESLint v0.4.0 中引入，并在 v9.0.0-alpha.0 中删除。

进阶读物

Use JSDoc: Index
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