First step

First...

You will have to create an app in our developer portal before editing storefront app extension. For details, please go through this section https://shopline-developers.readme.io/docs/intro

Once you have created an app, you can now edit the content of the storefront app extension in the following section.

App extension > Storefront App Extension

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App Approval

Every changes to the storefront app extension are subject to app approval.

In other word, if you change the scripts of it, it needs to get approved before it is effective and reflected in merchant's storefront