csswg-drafts/css-exclusions/style-toggle.js at b6d2e35adba08dddf4531fec8038a6d84804654c · w3c/csswg-drafts · GitHub

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(function() {
    var defaultStyleText = 'default spec. style';
    var additionalStyleText = "additional spec. style";
    var toggle;

    function toggleStyle() {
        var st = document.getElementById('st');

        if (st.hasAttribute('disabled') === true) {
            st.removeAttribute('disabled');
            st.disabled = false;
            toggle.textContent = defaultStyleText;
        } else {
            st.setAttribute('disabled', 'true');
            st.disabled = true;
            toggle.textContent = additionalStyleText;
        }
    }

    window.onload = function() {
        var st = document.getElementById('st');
        var divHead = document.getElementById('div-head');
        var defaultText = additionalStyleText;

        toggle = document.createElement('a');

		divHead.insertBefore(toggle, divHead.firstChild);
        toggle.textContent = defaultText;
        toggle.setAttribute('class', 'toggle');
        toggle.setAttribute('href', '#');
        toggle.addEventListener("click", toggleStyle, false);
    };

})();