max-depth.md

规则名	规则类型	关联规则
max-depth	suggestion	complexity max-len max-lines max-lines-per-function max-nested-callbacks max-params max-statements

Many developers consider code difficult to read if blocks are nested beyond a certain depth.

规则详解

This rule enforces a maximum depth that blocks can be nested to reduce code complexity.

配置项

This rule has a number or object option:

• "max" (default 4) enforces a maximum depth that blocks can be nested

Deprecated: The object property maximum is deprecated; please use the object property max instead.

max

选项 { "max": 4 } 默认值的 错误 代码示例：

/*eslint max-depth: ["error", 4]*/

function foo() {
    for (;;) { // Nested 1 deep
        while (true) { // Nested 2 deep
            if (true) { // Nested 3 deep
                if (true) { // Nested 4 deep
                    if (true) { // Nested 5 deep
                    }
                }
            }
        }
    }
}

选项 { "max": 4 } 默认值的 正确 代码示例：

::: correct

/*eslint max-depth: ["error", 4]*/

function foo() {
    for (;;) { // Nested 1 deep
        while (true) { // Nested 2 deep
            if (true) { // Nested 3 deep
                if (true) { // Nested 4 deep
                }
            }
        }
    }
}

Note that class static blocks do not count as nested blocks, and that the depth in them is calculated separately from the enclosing context.

Examples of incorrect code for this rule with { "max": 2 } option:

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

function foo() {
    if (true) { // Nested 1 deep
        class C {
            static {
                if (true) { // Nested 1 deep
                    if (true) { // Nested 2 deep
                        if (true) { // Nested 3 deep
                        }
                    }
                }
            }
        }
    }
}

Examples of correct code for this rule with { "max": 2 } option:

::: correct

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

function foo() {
    if (true) { // Nested 1 deep
        class C {
            static {
                if (true) { // Nested 1 deep
                    if (true) { // Nested 2 deep
                    }
                }
            }
        }
    }
}