JavaScript Utilities

Practical how-to guides for common JavaScript tasks in yStore storefronts. For foundational concepts (window.yui object, Alpine.js, section data), see JavaScript & Alpine.js.

window.yui Object

Full API reference — context properties, cookie helpers, form utilities, formatting methods.

Using fetch()

GET, POST JSON, POST form data, GraphQL queries and mutations — with error handling.

Building URLs in JS

BASE_URL, CURRENT_STORE_CODE, and URL construction patterns for REST and GraphQL.