enforce a maximum file length (max-lines)

强制文件的最大行数 (max-lines)

Some people consider large files a code smell. Large files tend to do a lot of things and can make it hard following what’s going. While there is not an objective maximum number of lines considered acceptable in a file, most people would agree it should not be in the thousands. Recommendations usually range from 100 to 500 lines.

有些人把大文件看作是一种代码味道。大文件可以做很多事情，也很难跟踪到底发生了什么。虽然没有一个客观的被认为是可接受的最大行数，大多数人会同意文件中的行数不应该不受限制。通常建议 100 到 500 行。

Rule Details

This rule enforces a maximum number of lines per file, in order to aid in maintainability and reduce complexity.

该规则强制文件的最大行数，以提高可维护性和降低复杂度。

Options

This rule has a number or object option:

该规则有一个数字或对象选项：

code

Examples of incorrect code for this rule with a max value of 2:

最大行数为 2 的 错误 代码示例：

/*eslint max-lines: ["error", 2]*/
var a,
    b,
    c;

/*eslint max-lines: ["error", 2]*/

var a,
    b,c;

/*eslint max-lines: ["error", 2]*/
// a comment
var a,
    b,c;

Examples of correct code for this rule with a max value of 2:

最大行数为 2 的 正确 代码示例：

/*eslint max-lines: ["error", 2]*/
var a,
    b, c;

/*eslint max-lines: ["error", 2]*/

var a, b, c;

/*eslint max-lines: ["error", 2]*/
// a comment
var a, b, c;

skipBlankLines

Examples of incorrect code for this rule with the { "skipBlankLines": true } option:

选项 { "skipBlankLines": true } 的 错误 代码示例：

/*eslint max-lines: ["error", {"max": 2, "skipBlankLines": true}]*/

var a,
    b,
    c;

Examples of correct code for this rule with the { "skipBlankLines": true } option:

选项 { "skipBlankLines": true } 的 正确 代码示例：

/*eslint max-lines: ["error", {"max": 2, "skipBlankLines": true}]*/

var a,
    b, c;

skipComments

Examples of incorrect code for this rule with the { "skipComments": true } option:

选项 { "skipComments": true } 的 错误 代码示例：

/*eslint max-lines: ["error", {"max": 2, "skipComments": true}]*/
// a comment
var a,
    b,
    c;

Examples of correct code for this rule with the { "skipComments": true } option:

选项 { "skipComments": true } 的 正确 代码示例：

/*eslint max-lines: ["error", {"max": 2, "skipComments": true}]*/
// a comment
var a,
    b, c;

When Not To Use It

You can turn this rule off if you are not concerned with the number of lines in your files.

如果你并不关心文件中的行数，你可以关闭此规则。

Further reading

Compatibility

Version

This rule was introduced in ESLint 2.12.0.

该规则在 ESLint 2.12.0 中被引入。

Resources