How to create custom Validation for UI Component Form? I want to create Validation for maximum character, not for max-word which is already available in Magento 2. if any body knows please share the procedure.Thanks

  • Can you please share your code where you want to add? Commented Aug 1, 2018 at 18:02
  • @RohanHapani <item name="validation" xsi:type="array"> <item name="required-entry" xsi:type="boolean">true</item> <item name="validate-length" xsi:type="boolean">true</item> Here i want to limit my character. i want that form sould only accept 250 character . </item>
    – sudo55
    Commented Aug 1, 2018 at 18:13
  • please check my answer and let me know if any issue. Commented Aug 1, 2018 at 18:42

1 Answer 1


Try to do like this :

<item name="validation" xsi:type="array">
<item name="required-entry" xsi:type="boolean">true</item>
<item name="max_text_length" xsi:type="number">250</item>

clean cache and check it.

  • thank you, its working. do you know how i can create my own validation?
    – sudo55
    Commented Aug 1, 2018 at 18:50
  • 1
    Happy Coding !! :) You can accept this answer for helpful to other developer. Commented Aug 1, 2018 at 18:51
  • Yes. You can create custom validation by js. You can take reference from here. inchoo.net/magento-2/build-your-custom-form-validation-rule Commented Aug 1, 2018 at 18:53
  • Now, You can Re-accept answer if this answer is useful in this above question ;) Commented Aug 1, 2018 at 19:10
  • 1
    Yes. I can give answer. But, you can create new question for that. Because, what's your question that I already gave answer and it's 100% working as you said. So, you can accept it. It's better if you create new question. So, for other user it's easy to get answer of this question :) Commented Aug 2, 2018 at 17:59

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