44 lines
1.1 KiB
JavaScript
44 lines
1.1 KiB
JavaScript
/**
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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 container, button, menu;
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container = document.getElementById( 'site-navigation' );
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if ( ! container ) {
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return;
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}
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button = container.getElementsByTagName( 'button' )[0];
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if ( 'undefined' === typeof button ) {
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return;
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}
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menu = container.getElementsByTagName( 'ul' )[0];
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// Hide menu toggle button if menu is empty and return early.
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if ( 'undefined' === typeof menu ) {
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button.style.display = 'none';
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return;
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}
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menu.setAttribute( 'aria-expanded', 'false' );
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if ( -1 === menu.className.indexOf( 'nav-menu' ) ) {
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menu.className += ' nav-menu';
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}
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button.onclick = function() {
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if ( -1 !== container.className.indexOf( 'toggled' ) ) {
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container.className = container.className.replace( ' toggled', '' );
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button.setAttribute( 'aria-expanded', 'false' );
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menu.setAttribute( 'aria-expanded', 'false' );
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} else {
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container.className += ' toggled';
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button.setAttribute( 'aria-expanded', 'true' );
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menu.setAttribute( 'aria-expanded', 'true' );
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}
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};
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} )();
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