plus/indent-binary-ops

Rule Details

Indentation for binary operators in multiline expressions. This is a supplement to the indent rule. They are supposed to be used together with the same indentation size.

Options

Same as the indent rule, it takes an option for the indentation size.

For example, for 2-space indentation:

{
  "@stylistic/indent": ["error", 2],
  "@stylistic/indent-binary-ops": ["error", 2]
}

Or for tabbed indentation:

{
  "@stylistic/indent": ["error", "tab"],
  "@stylistic/indent-binary-ops": ["error", "tab"]
}

This rule works by:

• Only check for binary operations that are multiline.
• Align the indentation of the second line with the same indentation of the first line (handled by the indent rule)
• In some conditions (e.g. last line ends with an open bracket), the indentation of the second line will be one level increased to the first line's indentation.

Examples

Examples of incorrect code for this rule:

/*eslint indent-binary-ops: ["error", 2]*/

if (a
    && b
      && c
    && (d
          || e
            || f
          )
) {
  foo()
}

incorrect

Examples of correct code for this rule:

/*eslint indent-binary-ops: ["error", 2]*/

if (a
  && b
  && c
  && (d
    || e
    || f
  )
) {
  foo()
}

correct