Add Custom code/ CSS correctly
Learn where to add your Custom code/ CSS so you won't lose them whenver updating to the latest theme version
File assets/custom.css.liquid: Add Custom CSS here.
File snippets/custom-code-head.liquid: Add Custom Code such as tracking script, meta tag before closing tag </head>.
File snippets/custom-code-body.liquid: Add Custom Code such as tracking script before closing tag </body>.
If you made any customizations in these files:
Any files created by a 3rd-party app or customized codes from merchants/dev teams;
theme.liquid snippets;
then you would need to manually copy the Custom code/CSS over to the updated theme. There is currently no way around this with Shopify.
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