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I need to validate a field in a custom form. The field should be not required, and should validate if the content entered in it are numbers. I added the validation on the form which works. What does not work is the validation of this field.

<input type="number" class="product-quantity" name="qty" data-validate="{ required: false, number: true }"/>

I have tried using number and using validate-number but it does not help. After typing for example abc the validation passes.

Thank you in advance for your help!

2 Answers 2

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Would you be able to post the entire form code?

I suspect that you are missing the initialization of the mage/validation library.

Please see here

In order for the validation rules to work. You must initialize the library within the scope of the form

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  • Check comment below.
    – mrcl
    Apr 22, 2022 at 11:44
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@Ocastro I have something like that. As I said. The other rules work correctly. Only on this field neither number nor validate-number validation works for me.

<script type="text/x-magento-init">
        {
            "#ask-container": {
                "VENDOR_MODULE/js/askAboutAvailability": {
                     "telephone": "<?= $block->getConfigData("telephone"); ?>",
                     "ajaxRequestUrl": "<?= $escaper->escapeUrl($block->getPostUrl()) ?>"
            }
       }
  }
</script>

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