         const content = guideContents[i];
            content.hidden = 'until-found';
            content.addEventListener('beforematch', function () {
                toggle(content.id);
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        if (window.location.hash) {
            const anchors = document.getElementsByName(window.location.hash.substring(1));
            if (anchors.length == 1 && anchors[0].children.length > 0) {
                anchors[0].children[0].click();
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        }

        showPreview();
