no-lonely-if

An else block that holds nothing but an if is an else if with one more level of indentation. Each extra condition pushes the code further to the right.

--fix rewrites it to else if. It leaves the code alone if the else block also has a comment, which would be lost.

Configure

Off by default. To turn it on:

[lint.rules]
"no-lonely-if" = "error" # or "warn"

Examples

Reported:

if (user.isAdmin) {
  showAdminPage();
} else {
  if (user.isMember) {
    showMemberPage();
  } else {
    showLogin();
  }
}

Not reported:

if (user.isAdmin) {
  showAdminPage();
} else if (user.isMember) {
  showMemberPage();
} else {
  showLogin();
}

Not reported, because the else block does something else as well:

if (user.isAdmin) {
  showAdminPage();
} else {
  if (user.isMember) {
    showMemberPage();
  }
  trackVisit(user);
}