sampleField

sampleField.js

// Trigger / action code here

const methodNameToAddFieldBasedOnAbove = async (z, bundle) => {
  // projectOnEachLine would be whatever the value is for that entry in
  // the project dropdown
  if (bundle.inputData.specificKeyYouCareAbout !== projectOnEachLine) {
    // Return an empty array to not display the field
    return [];
  }
  
  // Do some call here or return some field with all the standard
  // inputField keys / values. This is where you'd add your line
  // project field.
  return { ... }
}

module.exports = {
   // Key / noun / display stuff here
  operation: {
    inputFields: [
      { 
        // key / label / etc here
        key: 'specificKeyYouCareAbout',
        // This tells Zapier that whenever this field is updated we
        // should refresh the other fields. The method below will
        // get the updated field information and be executed again.
        altersDynamicFields: true, 
      },
      methodNameToAddFieldBasedOnAbove,
    ],
  },
};