isEmptyLine

function isEmptyLine(lineText): boolean;

Defined in: packages/engine/src/engine/ExpressionEngineSafety.ts:305

Check if a line is effectively empty (whitespace only or only markdown syntax).

Phase B: Delegates to the ExpressionLexer’s character-by-character markdown line scanner, replacing the old regex-based heuristics.

Skips lines that contain no evaluable expression:

• Whitespace-only lines
• Markdown structural markers (headings, blockquotes, lists without inline solves)
• Code block fences (```)
• MathJax block fences ($$)
• Table separator rows (|---|)
• Horizontal rules (---, ***, ___)
• Standalone wikilinks / embeds ([[…]], ![[…]])
• Whole-line comments (a line whose first non-whitespace characters are //)

Lines containing inline solves (s...) are never considered empty.

Note: a trailing #/// comment in the MIDDLE of an otherwise-evaluable line does NOT make isEmptyLine() return true, that line is still an “expression” line (skip: false). The comment is instead stripped at tokenization time (ExpressionLexer’s HASH/// handling emits a COMMENT token for the rest of the line) and then filtered out of the token stream by ExpressionEngine.prepareExpression() before parsing, so <expr> // note evaluates identically to <expr> alone.

Parameters

Parameter	Type
lineText	string

Returns

boolean