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// Inline header height calculation to prevent layout shift
// Note: Updates in calculateHeaderGroupHeight() and updateTransparentHeaderOffset()utilities.js should be kept in sync with this function
(function setHeaderHeighCustomProperties() {
/*
* Header calculation functions for maintaining CSS variables
* Mimic calculateHeaderGroupHeight() in utilities.js
*/
const header = document.querySelector('header-component');
const headerGroup = document.querySelector('#header-group');
const hasHeaderSection = headerGroup?.querySelector('.header-section');
if (!header || !headerGroup) return;
const headerHeight = header.offsetHeight;
// Calculate the total height of the header group
let headerGroupHeight = 0;
const children = headerGroup.children;
for (let i = 0; i < children.length; i++) {
const element = children[i];
if (element === header || !(element instanceof HTMLElement)) continue;
headerGroupHeight += element.offsetHeight;
}
// Check for transparent header special case
if (header.hasAttribute('transparent') && header.parentElement?.nextElementSibling) {
headerGroupHeight += headerHeight;
}
// Set CSS variables
document.body.style.setProperty('--header-height', `${headerHeight}px`);
document.body.style.setProperty('--header-group-height', `${headerGroupHeight}px`);
/**
* Updates CSS custom properties for transparent header offset calculation
* Mimic updateTransparentHeaderOffset() in utilities.js
*/
if (!hasHeaderSection || !header?.hasAttribute('transparent')) {
document.body.style.setProperty('--transparent-header-offset-boolean', '0');
return;
}
const hasImmediateSection = hasHeaderSection.nextElementSibling?.classList.contains('shopify-section');
const shouldApplyOffset = !hasImmediateSection ? '1' : '0';
document.body.style.setProperty('--transparent-header-offset-boolean', shouldApplyOffset);
})();
