How to use the Set Variable block

The Set Variable block is a versatile tool that allows you to assign, manipulate, and manage variables dynamically in workflows. Below is a comprehensive guide explaining its functionalities and use cases.

The Set Variable block enables you to:

1. Assign predefined values or custom values to variables.
2. Manipulate variables using JavaScript expressions.
3. Transform variables for specific operations (e.g., calculations, string transformations).
4. Fetch specific data from lists using index mapping.
5. Reset or append values to variables dynamically during execution.

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Custom Values

You can set a variable with:

• Plain text (e.g., Welcome to our service!).
• Dynamic JavaScript code for advanced operations.

Examples:

'John' + ' Smith'
// Returns: "John Smith"

const base = 'https://example.com/';
const endpoint = 'api';
return base + endpoint;
// Returns: "https://example.com/api"

Note: If the return keyword is omitted, it is automatically added.

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Expressions with Existing Variables

Apply operations directly on variables to compute new values.

Examples:

• Add a Value to a Variable:

  Copy

  {{Score}} + 5
  

• Compute a Sum of Variables:

  Copy

  {{Score}} + {{Answer}}
  

• Extract First Name from Full Name:

  Copy

  {{FullName}}.split(' ')[0]
  

• Transform to Uppercase:

  Copy

  {{Name}}.toUpperCase()
  

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Predefined Value Options

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Empty

Resets the variable to its uninitialized state.

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Append Values

Converts the variable into a list and appends new values.

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Environment Name

Sets the variable as web or whatsapp based on the user’s platform.

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Transcript

Saves the conversation transcript into a variable. Useful for sending recaps or providing AI context.

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Result ID

Assigns the unique ID corresponding to the current user interaction.

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Random ID

Generates a unique ID using the CUID algorithm.

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Pop

The Pop operation removes the last item from the list variable you provide, and stores that item in the Popped item variable. It is particularly useful when you want to build a loop that processes list items one by one.

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Shift

The Shift operation removes the first item from the list variable you provide, and stores that item In the Shifted item variable. It is particularly useful when you want to build a loop that processes list items one by one.

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Moment of the Day

Sets the variable with values like:

• morning
• afternoon
• evening
• night

This is determined based on the user’s local time.

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Advanced Operations

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Map Item with Same Index

Fetch data from a corresponding index in two parallel lists.

Example:

• Scenario: You have two lists:
  • Labels: [Action, Drama, Comedy]
  • IDs: [123, 456, 789]
• When the user selects “Drama,” the variable Selected ID is set to 456.

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Date and Time Presets

Assign date values:

• Yesterday, Now, or Tomorrow in ISO format.
• Optional timezone adjustments.

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Client-Side Execution

Run custom JavaScript on the user’s browser to access client-specific properties.

Example: Fetch the user’s geolocation:

function getLocation() {
  return new Promise((resolve) => {
    navigator.geolocation.getCurrentPosition(
      (position) => resolve(`${position.coords.latitude}, ${position.coords.longitude}`),
      (error) => resolve('error'),
      { enableHighAccuracy: true, timeout: 5000 }
    );
  });
}

const coords = await getLocation();
if (coords === 'error') {
  return 'Unable to get location';
}
return coords;

Note: Enable “Execute on Client” to use browser-specific features.

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Save in Results

By default, variables are session-specific. Enabling this option will save the variable in the Submissions table for future reference.