indentWidth

Size of indentation. When enabled useTabs, this option may be disregarded, since only one tab will be inserted when indented once.

Default option is 2. This can't be zero.

Example for 2

<script
  src="very-very-very-very-long-name.js"
  async
  defer
></script>

Example for 4

<script
    src="very-very-very-very-long-name.js"
    async
    defer
></script>