n8n-expression-syntax

Fix n8n expression syntax errors by validating {{}} usage and applying .body notation for webhook data access. Use bracket notation for spaces and special characters to ensure correct data mapping and prevent silent workflow failures.

n8n cross-node data mapping returns undefined when node references lack proper casing or quotes. Validate $node references using correct syntax patterns to ensure data flows accurately between workflow nodes without runtime errors.

The correct syntax for n8n expressions wraps $json and $now variables in double curly braces {{}}. Validating this structure prevents miswired data flows and ensures the expression editor parses dynamic variables correctly.

Debug n8n expressions that fail silently by verifying {{}} usage and checking bracket notation for special characters. Apply debugging guidance to validate webhook data access patterns and cross-node references to reduce runtime errors.

n8n requires quotes for node references containing spaces or special characters in expressions. Using proper bracket notation and quoted strings ensures cross-node data mapping parses correctly and prevents syntax validation failures.

You can validate n8n expressions before running workflows by editing the target field and checking the result in the expression editor. Confirming correct {{}} syntax beforehand prevents miswired data flows and silent failures.