What are the benefits of improving website performance?

Shopify Discussion

Topic summary

Focus: Managing Shopify’s content_for_header to reduce performance impact while preserving app functionality.

Key points:

  • content_for_header is a placeholder where Shopify and apps inject scripts/meta. Benefit: apps can add/remove their code cleanly on install/uninstall, avoiding leftover theme code.
  • Performance concern: screenshots indicate significant PageSpeed differences with/without content_for_header. Code snippets are central to the discussion.

Proposed approach (working for some):

  • Capture, filter, and conditionally output:
    • Capture: {% capture h_content %} {{ content_for_header }} {% endcapture %}.
    • Remove unwanted scripts by chaining Liquid remove filters on the same h_content output.
    • Use precise matches from View Source, escape slashes (/), and include encoded chars (e.g., \u0026).
    • Apply per-template conditions (use full comparisons: template contains ‘product’ or template contains ‘blog’, etc.).

Common pitfalls reported:

  • Not chaining multiple remove filters on the same output.
  • Incorrect escaping or string mismatches.
  • Faulty Liquid conditions (e.g., ‘or’ without repeating the left side).
  • Printing content_for_header instead of the filtered h_content in some branches.

Alternatives and notes:

  • Some delay scripts on specific pages; others block content_for_header entirely (advanced, risky, requires manual replacements).
  • A NationBuilder workaround uses + JS regex (platform-specific).
  • No built-in Shopify admin controls or confirmed REST Admin API to edit content_for_header; the request remains open/unsolved.
Summarized with AI on January 30. AI used: gpt-5.
6

This looks like a very VERY interesting technique!..but I also couldn’t get it to work, even when escaping the / in the urls, or copying them exactly as they stand in the source code.

Here’s what I did for a test:

{% capture h_content %}
{{ content_for_header }}
{% endcapture %}

{% if template contains “product” %}
{{ h_content | remove: “https://tabs.stationmade.com/registered-scripts/tabs-by-station.js?shop=hyttefeber.myshopify.com” }}
{{ h_content | remove: “https://ajax.aspnetcdn.com/ajax/jQuery/jquery-2.2.4.min.js” }}

{% else %}
{{ content_for_header }}
{% endif %}

Any ideas?