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$evaluateExpression(expression: string, itemIndex?: number)#

Evaluates a given string as expression.

If you don't provide itemIndex, n8n uses:

  • The data from item 0 in the Function node.
  • The data from the current item in the Function Item node.

Example:

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items[0].json.variable1 = $evaluateExpression('{{1+2}}');
items[0].json.variable2 = $evaluateExpression($node["Set"].json["myExpression"], 1);

return items;