I am working on JavaScript add-on. while trying to read HTML loaded on the browser via chrome's developer tool -> element tab.

the code was executing fine. but I can't see attribute. it is a just simple custom attribute, right?

this question is only for the knowledge base.

enter image description here

on save button there should have extra attribute "data-mage-init" which help to execute some javascript.

  • 2
    check by view source(Ctrl + U).
    – kunj
    Commented May 23, 2018 at 13:24
  • @kunj thanks it worked. but do you know why it not working in element tab? is it bug from chrome? FireFox also don't show "data-mage-init" in inspector. Commented May 23, 2018 at 13:55
  • Not Sure about it but Magento call this js for that vendor/magento/module-ui/view/base/web/js/lib/knockout/bindings/mage-init.js And this file calls this one. lib/web/mage/apply/main.js Main JS process for data-mage-init and I think remove that attribute from HTML.
    – kunj
    Commented May 23, 2018 at 14:09

1 Answer 1


Magento removing that data-mage-init attribute from lib/web/mage/apply/main.js this file and from this function:

function getData(el) {
        var data = el.getAttribute(dataAttr);


        return {
            el: el,
            data: JSON.parse(data)

You can see el.removeAttribute(dataAttr); code in that function.

I think Magento removing that for security and minify HTML. Maybe there are other reasons for that.

  • 1
    That is correct +1. Commented May 23, 2018 at 14:37

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