# JavaScript

Shopify allows apps to inject JavaScript into the online storefront. (This is facilitated by [ScriptTag](https://shopify.dev/docs/admin-api/rest/reference/online-store/scripttag) in the Shopify API.)

Mechanic supports this by allowing each task to specify its own JavaScript, to be injected into the online storefront.

<figure><img src="/files/Qg9iBvQNHn32Pe9FXRrv" alt=""><figcaption></figcaption></figure>

Here, the developer can add in their own JavaScript code, taking advantage of Liquid for mixing in data from the current store, or from the current task's options.

{% hint style="info" %}
A task's JavaScript content only has access to to the `shop` and `options` Liquid variables. The rendering context is similar to that of [task subscriptions](/core/tasks/subscriptions.md#using-liquid); Liquid code here does not have access to any data related to events, and cannot dynamically respond to any information about the visitor's current request.
{% endhint %}

![](/files/V2OTgAXVAcjGUc75VK6N)


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