Field arrays

Felte supports creating fields from arrays by adding an index to its name. There's a few things to consider when working with field arrays:

• A field's name that belongs to an array must refer to an object, for example: "interests.0.value". This is how Felte differentiates between field arrays and multiple checkboxes.
• When setting initial values, Felte will only consider arrays of objects as arrays of fields. Empty arrays will be treated as a checkbox field without any value initially selected. It's better to not set an initial value for field arrays if no field should be initially rendered.
• Felte does not keep the same objects on update, so Index should be used instead of For.

createForm also returns some helpers to manage field arrays:

• addField to add a field at a specific index, or at the end if no index is provided.
• unsetField to remove a field completely from your stores.
• swapFields to swap the position of two fields.
• moveField to move a field from one position to another.

TODO: A proper API to handle field arrays is still being developed.