Code Node

Execute code to customize data processing. This node provides JavaScript programming capabilities to manipulate the input data freely.

Parameters

code

The code to execute and return a value using `return` keyword, similar to a function. The code has access to input data as `input` variable. The code is executed in a secure sandbox environment, so it cannot access external libraries or APIs.

Examples

Basic Data Processing

// Access input items:
const processedItems = items.map((item) => ({
  ...item,
  fullName: item.firstName + " " + item.lastName,
  isActive: item.status === "active",
}));

return processedItems;

Complex Data Processing

// Access input data:
// Transform input object into a formatted summary
const { firstName, lastName, age, email, address } = input;

return {
  fullName: `${firstName} ${lastName}`,
  contactInfo: {
    email: email?.toLowerCase(),
    displayEmail: email
      ? `${firstName.toLowerCase()}.${lastName.toLowerCase()}@example.com`
      : null,
  },
  location: address
    ? {
        city: address.city,
        country: address.country,
        formatted: `${address.city}, ${address.country}`,
      }
    : null,
  ageGroup: age < 18 ? "minor" : age < 65 ? "adult" : "senior",
  timestamp: new Date().toISOString(),
};

Complex Business Logic

// Complex scoring algorithm
function calculateScore(user) {
let score = 0;

// Activity score
if (user.lastLoginAt) {
const daysSinceLogin = (Date.now() - new Date(user.lastLoginAt)) / (1000 _ 60 _ 60 \* 24);
score += Math.max(0, 100 - daysSinceLogin);
}

// Engagement score
score += (user.actionsCount || 0) \* 2;

// Premium bonus
if (user.isPremium) {
score \*= 1.5;
}

return Math.round(score);
}

const scoredUsers = users.map(user => ({
...user,
score: calculateScore(user),
tier: calculateScore(user) > 150 ? "gold" :
calculateScore(user) > 50 ? "silver" : "bronze"
}));

return scoredUsers;

Data Validation and Filtering

// Comprehensive data validation
function validateUser(user) {
  const errors = [];

  if (!user.email || !user.email.includes("@")) {
    errors.push("Invalid email");
  }

  if (!user.name || user.name.length < 2) {
    errors.push("Name too short");
  }

  if (user.age && (user.age < 0 || user.age > 120)) {
    errors.push("Invalid age");
  }

  return errors;
}

const validationResults = inputData.map((user) => {
  const errors = validateUser(user);
  return {
    ...user,
    isValid: errors.length === 0,
    validationErrors: errors,
  };
});

// Return only valid users or all with validation status
return validationResults.filter((user) => user.isValid);