enforce a maximum depth that blocks can be nested (max-depth)

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

Rule Details

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

Options

This rule has a number or object option:

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

max

Examples of incorrect code for this rule with the default { "max": 4 } option:

/*eslint max-depth: ["error", 4]*/
/*eslint-env es6*/

function foo() {
    for (;;) { // Nested 1 deep
        let val = () => (param) => { // Nested 2 deep
            if (true) { // Nested 3 deep
                if (true) { // Nested 4 deep
                    if (true) { // Nested 5 deep
                    }
                }
            }
        };
    }
}

Examples of correct code for this rule with the default { "max": 4 } option:

/*eslint max-depth: ["error", 4]*/
/*eslint-env es6*/

function foo() {
    for (;;) { // Nested 1 deep
        let val = () => (param) => { // Nested 2 deep
           if (true) { // Nested 3 deep
                if (true) { // Nested 4 deep
                }
            }
        };
    }
}

Version

This rule was introduced in ESLint 0.0.9.

Resources