Language services formatting for `else` on newline

Search Terms

• format else
• formatted else
• fomatter newline
• formatting newline

Suggestion

When the formatting option for the opening brace on newline for control blocks is true, it would make sense to have the else on it's online as well.

Use Cases

Using typescript-formatter with VS Code, and from command line.

Examples

My tsfmt.json is:

{
    "baseIndentSize": 0,
    "indentSize": 4,
    "tabSize": 4,
    "indentStyle": 2,
    "newLineCharacter": "\n",
    "convertTabsToSpaces": true,
    "insertSpaceAfterCommaDelimiter": true,
    "insertSpaceAfterSemicolonInForStatements": true,
    "insertSpaceBeforeAndAfterBinaryOperators": true,
    "insertSpaceAfterConstructor": false,
    "insertSpaceAfterKeywordsInControlFlowStatements": true,
    "insertSpaceAfterFunctionKeywordForAnonymousFunctions": false,
    "insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis": false,
    "insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets": false,
    "insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces": true,
    "insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces": false,
    "insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces": false,
    "insertSpaceAfterTypeAssertion": false,
    "insertSpaceBeforeFunctionParenthesis": false,
    "insertSpaceBeforeTypeAnnotation": false,
    "placeOpenBraceOnNewLineForFunctions": true,
    "placeOpenBraceOnNewLineForControlBlocks": true
}

I get results like this:

if(condition)
{
     console.log('condition true');
} else if(otherCondition)
{
     console.log('other condition is true');
} else 
{
     console.log('condition not true');
}

For people using "placeOpenBraceOnNewLineForControlBlocks": true, the expected behaviour (IMHO) would be:

if(condition)
{
     console.log('condition true');
} 
else if(otherCondition)
{
     console.log('other condition is true');
} 
else 
{
     console.log('condition not true');
}

Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

Start by locating the formatter entry points used by TypeScript formatting in VS Code and the command-line typescript-formatter, then trace handling for control-block braces. Compare the current and expected examples; done means the configured newline style places else on its own line without changing other formatting behavior.