scripts:tables

Scripts can be used in forms that contain tables. Use them to:

- calculate table field values based on the values of cells in the same row.
- reference the overall sum of the values in a table column to calculate the value of a non-table field.

Unlike automatically calculated table fields, scripts allow you to define conditions and support other field types, like multiple choice.

Suppose you have a form that contains a table with a list of items available for purchase. Each item has a **Name, Price, Quantity, Subtotal,** and **Tax** field. **Tax** is a multiple choice field with three options: 0%, 5% and 7%.

The value of the **Subtotal** field can be automatically calculated and filled in with help from this piece of code:

form.onChange(['Price', 'Quantity', 'Tax']) .setValue('Subtotal', state => { const [price, quantity, taxRate] = state.changes; if (!price.value || !quantity.value) return [0]; let cost = price.value * quantity.value; const tax = taxRate.choice_name ? parseInt(taxRate.choice_name) : 0; if (taxRate.choice_name) cost += cost * (tax / 100); return [cost]; });

Let’s place two fields, **Discount** and **Grand total,** at the bottom of the table.

To automatically calculate **the Grand total** (the total after the discount), use this code:

form.onChange(['Subtotal', 'Discount']) .setValue('Grand total', state => { const [cost, discount] = state.changes; const total = cost.sum * (1 - discount.value / 100); return [total]; });

Both pieces of code can work together, creating a chain of dependent fields.

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