33 lines
863 B
JavaScript
33 lines
863 B
JavaScript
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/**
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* navigation.js
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*
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* Handles toggling the navigation menu for small screens.
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*/
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( function() {
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var nav = document.getElementById( 'site-navigation' ), button, menu;
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if ( ! nav )
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return;
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button = nav.getElementsByTagName( 'h3' )[0];
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menu = nav.getElementsByTagName( 'ul' )[0];
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if ( ! button )
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return;
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// Hide button if menu is missing or empty.
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if ( ! menu || ! menu.childNodes.length ) {
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button.style.display = 'none';
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return;
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}
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button.onclick = function() {
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if ( -1 == menu.className.indexOf( 'nav-menu' ) )
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menu.className = 'nav-menu';
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if ( -1 != button.className.indexOf( 'toggled-on' ) ) {
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button.className = button.className.replace( ' toggled-on', '' );
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menu.className = menu.className.replace( ' toggled-on', '' );
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} else {
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button.className += ' toggled-on';
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menu.className += ' toggled-on';
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}
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};
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} )();
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