Uncaught TypeError: Constr is not a constructor Error adminpanel Magento 2.

When you are dealing with Magento 2 ui_component modification for a text input field with the custom component, Sometimes you might have faced the issue like,

Uncaught TypeError: Constr is not a constructor layout.js line no xx.

You can resolve this issue by just adding a proper javascript object to your js file.

For Text input field, You need to add ‘Magento_Ui/js/form/element/abstract’ Object in your JS file.

Let’s an example of ui_component with form field input type,

You have created a custom js file for your field at a location, app/code/Package/Modulename/view/adminhtml/web/js/form/custom-field.js

Wrong Format of Used JS file,

  • Resolution Use ‘Magento_Ui/js/form/element/abstract’ to define your custom js file.In Magento 2 adminhtml  area UI Form Component,


    Each individual form element has a corresponding view model object.  For text input fields, these view models come from the constructor function returned by the Magento_Ui/js/form/element/abstract RequireJS module.

    The correct format for JS file for text field,

    You can rid of the error using correct JS format dependency.