I have a phtml file with a form that used data-mage-init

<form data-mage-init='{"validation": {}}' class="form" id="custom-form" method="post" autocomplete="off">

and then I initialize a knockout component at the bottom of the page

<script type="text/x-magento-init">
        "#custom-form": {
            "Magento_Ui/js/core/app": {
               "components": {
                    "mycomponent": {
                        "component": "Company_Module/js/mycomponent"

For some reason the validation only works when I remove the "x-magento-init" script at the bottom. I had to make the validation work by calling click using knockoutjs on the button and validating in the component When the "x-magento-init" script is on the page, the submit call on the validation never seems to happen. I can't figure out why? Anyone know?

1 Answer 1


If you want to use validation in UI component you need to use data-bind="mageInit: {'validation': {}}" instead of data-mage-init='{"validation":{}}'.

So you form tag should looks like this:

<form data-bind="mageInit: {'validation': {}}" class="form" id="custom-form" method="post" autocomplete="off"> </form>

  • This answer should be accepted. Commented Oct 24, 2018 at 18:06
  • Can't believe this isn't documented better in the Dev Docs. Thanks a lot! Commented Dec 14, 2020 at 11:06
  • Thank you so much it is really awesome. I have spent 2 days on this but was not been able to find a solution. Commented Apr 29, 2022 at 9:29

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