DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (c68fe15a81fc)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269
<!DOCTYPE html>
<html>
<head>
<title>Shadow DOM: HTMLSlotElement interface</title>
<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">
<meta name="assert" content="HTMLSlotElement must exist on window with name attribute and getAssignedNode() method">
<link rel="help" href="https://w3c.github.io/webcomponents/spec/shadow/#the-slot-element">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id="log"></div>
<script>

test(function () {
    assert_true('HTMLSlotElement' in window, 'HTMLSlotElement must be defined on window');
    assert_equals(HTMLSlotElement.prototype.__proto__, HTMLElement.prototype, 'HTMLSlotElement should inherit from HTMLElement');
    assert_true(document.createElement('slot') instanceof HTMLSlotElement, 'slot element should be an instance of HTMLSlotElement');
    assert_true(document.createElement('slot') instanceof HTMLElement, 'slot element should be an instance of HTMLElement');
}, 'HTMLSlotElement must be defined on window');

test(function () {
    assert_true('name' in HTMLSlotElement.prototype, '"name" attribute must be defined on HTMLSlotElement.prototype');

    var slotElement = document.createElement('slot');
    assert_equals(slotElement.name, '', '"name" attribute must return the empty string when "name" content attribute is not set');

    slotElement.setAttribute('name', 'foo');
    assert_equals(slotElement.name, 'foo', '"name" attribute must return the value of the "name" content attribute');

    slotElement.name = 'bar';
    assert_equals(slotElement.name, 'bar', '"name" attribute must return the assigned value');
    assert_equals(slotElement.getAttribute('name'), 'bar', '"name" attribute must update the "name" content attribute');
}, '"name" attribute on HTMLSlotElement must reflect "name" attribute');

function testSlotOutsideShadowTree(options)
{
    test(function () {
        assert_true('assignedNodes' in HTMLSlotElement.prototype, '"assignedNodes" method must be defined on HTMLSlotElement.prototype');

        var slotElement = document.createElement('slot');
        assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes() must return an empty array when the slot element is not in any tree');

        document.body.appendChild(slotElement);
        assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes() must return an empty array when the slot element is in a document tree');

    }, 'assignedNodes(' + (options ? JSON.stringify(options) : '')
        + ') on a HTMLSlotElement must return an empty array when the slot element is not in a tree or in a document tree');
}

testSlotOutsideShadowTree(null);
testSlotOutsideShadowTree({flattened: false});
testSlotOutsideShadowTree({flattened: true});

function testSingleLevelOfSlotting(options)
{
    test(function () {
        assert_true('assignedNodes' in HTMLSlotElement.prototype, '"assignedNodes" method must be defined on HTMLSlotElement.prototype');

        var shadowHost = document.createElement('div');
        var child = document.createElement('p');

        var shadowRoot = shadowHost.attachShadow({mode: 'open'});
        var slotElement = document.createElement('slot');
        shadowRoot.appendChild(slotElement);

        assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes() must return an empty array when there are no nodes in the shadow tree');

        shadowHost.appendChild(child);
        assert_array_equals(slotElement.assignedNodes(options), [child], 'assignedNodes() on a default slot must return an element without slot element');

        child.setAttribute('slot', 'foo');
        assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes() on a default slot must not return an element with non-empty slot attribute');

        child.setAttribute('slot', '');
        assert_array_equals(slotElement.assignedNodes(options), [child], 'assignedNodes() on a default slot must return an element with empty slot attribute');

        slotElement.setAttribute('name', 'bar');
        assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes() on a named slot must not return an element with empty slot attribute');

        slotElement.setAttribute('name', '');
        assert_array_equals(slotElement.assignedNodes(options), [child], 'assignedNodes() on an empty name slot must return an element with empty slot attribute');

    }, 'assignedNodes(' + (options ? JSON.stringify(options) : '') + ') must return the list of assigned nodes when none of the assigned nodes themselves are slots');
}

testSingleLevelOfSlotting(null);
testSingleLevelOfSlotting({flattened: false});
testSingleLevelOfSlotting({flattened: true});

function testMutatingSlottedContents(options)
{
    test(function () {
        var shadowHost = document.createElement('div');
        var p = document.createElement('p');
        var b = document.createElement('b');
        shadowHost.appendChild(p);
        shadowHost.appendChild(b);

        var shadowRoot = shadowHost.attachShadow({mode: 'open'});
        var slotElement = document.createElement('slot');
        shadowRoot.appendChild(slotElement);

        assert_array_equals(slotElement.assignedNodes(options), [p, b], 'assignedNodes must return the distributed nodes');

        slotElement.name = 'foo';
        assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes must be empty when there are no matching elements for the slot name');

        b.slot = 'foo';
        assert_array_equals(slotElement.assignedNodes(options), [b], 'assignedNodes must return the nodes with the matching slot name');

        p.slot = 'foo';
        assert_array_equals(slotElement.assignedNodes(options), [p, b], 'assignedNodes must return the nodes with the matching slot name in the tree order');

        slotElement.removeAttribute('name');
        assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes must be empty for a default slot when all elements have "slot" attributes specified');

    }, 'assignedNodes(' + (options ? JSON.stringify(options) : '') + ') must update when slot and name attributes are modified');
}

testMutatingSlottedContents(null);
testMutatingSlottedContents({flattened: false});
testMutatingSlottedContents({flattened: true});

function testMutatingSlotName(options)
{
    test(function () {
        var shadowHost = document.createElement('div');
        var child = document.createElement('span');
        shadowHost.appendChild(child);

        var shadowRoot = shadowHost.attachShadow({mode: 'open'});
        var slotElement = document.createElement('slot');
        slotElement.name = 'foo';
        shadowRoot.appendChild(slotElement);

        assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes must be empty when there are no matching elements for the slot name');

        slotElement.removeAttribute('name');
        assert_array_equals(slotElement.assignedNodes(options), [child], 'assignedNodes must be empty when there are no matching elements for the slot name');

    }, 'assignedNodes(' + (options ? JSON.stringify(options) : '') + ') must update when a default slot is introduced dynamically by a slot rename');
}

testMutatingSlotName(null);
testMutatingSlotName({flattened: false});
testMutatingSlotName({flattened: true});

function testInsertingAndRemovingSlots(options)
{
    test(function () {
        var shadowHost = document.createElement('div');
        var p = document.createElement('p');
        var text = document.createTextNode('');
        var comment = document.createComment('');
        var processingInstruction = document.createProcessingInstruction('target', 'data');
        var b = document.createElement('b');
        shadowHost.appendChild(p);
        shadowHost.appendChild(text);
        shadowHost.appendChild(comment);
        shadowHost.appendChild(processingInstruction);
        shadowHost.appendChild(b);

        var shadowRoot = shadowHost.attachShadow({mode: 'open'});

        var firstSlotElement = document.createElement('slot');
        shadowRoot.appendChild(firstSlotElement);

        var secondSlotElement = document.createElement('slot');
        shadowRoot.appendChild(secondSlotElement);

        assert_array_equals(firstSlotElement.assignedNodes(options), [p, text, b],
            'assignedNodes on a default slot must return the elements without slot attributes and text nodes');
        assert_array_equals(secondSlotElement.assignedNodes(options), [],
            'assignedNodes on the second unnamed slot element must return an empty array');

        shadowRoot.removeChild(firstSlotElement);
        assert_array_equals(firstSlotElement.assignedNodes(options), [],
            'assignedNodes on a detached formerly-default slot must return an empty array');
        assert_array_equals(secondSlotElement.assignedNodes(options), [p, text, b],
            'assignedNodes on the second unnamed slot element after removing the first must return the elements without slot attributes and text nodes');

        shadowRoot.removeChild(secondSlotElement);
        shadowRoot.appendChild(secondSlotElement);
        assert_array_equals(firstSlotElement.assignedNodes(options), [],
            'Removing and re-inserting a default slot must not change the result of assignedNodes on a detached slot');
        assert_array_equals(secondSlotElement.assignedNodes(options), [p, text, b],
            'Removing and re-inserting a default slot must not change the result of assignedNodes');

        shadowRoot.insertBefore(firstSlotElement, secondSlotElement);
        assert_array_equals(firstSlotElement.assignedNodes(options), [p, text, b],
            'assignedNodes on a newly inserted unnamed slot element must return the elements without slot attributes and text nodes');
        assert_array_equals(secondSlotElement.assignedNodes(options), [],
            'assignedNodes on formerly-first but now second unnamed slot element must return an empty array');

    }, 'assignedNodes(' + (options ? JSON.stringify(options) : '') + ') must update when slot elements are inserted or removed');
}

testInsertingAndRemovingSlots(null);
testInsertingAndRemovingSlots({flattened: false});
testInsertingAndRemovingSlots({flattened: true});

test(function () {
    var outerHost = document.createElement('div');
    var outerChild = document.createElement('span');
    outerHost.appendChild(outerChild);

    var outerShadow = outerHost.attachShadow({mode: 'closed'});
    var innerHost = document.createElement('div');
    var outerSlot = document.createElement('slot');
    var innerChild = document.createElement('b');
    outerShadow.appendChild(innerHost);
    innerHost.appendChild(outerSlot);
    innerHost.appendChild(innerChild);

    var innerShadow = innerHost.attachShadow({mode: 'closed'});
    var innerSlot = document.createElement('slot');
    innerShadow.appendChild(innerSlot);

    assert_array_equals(outerSlot.assignedNodes(), [outerChild], 'assignedNodes() on a default slot must return the assigned nodes');
    assert_array_equals(outerSlot.assignedNodes({flatten: false}), [outerChild], 'assignedNodes({flatten: false}) on a default slot must return the assigned nodes');
    assert_array_equals(outerSlot.assignedNodes({flatten: true}), [outerChild], 'assignedNodes({flatten: true}) on a default slot must return the assigned nodes if they are not themselves slots');

    assert_array_equals(innerSlot.assignedNodes(), [outerSlot, innerChild], 'assignedNodes() on a default slot must return the assigned nodes');
    assert_array_equals(innerSlot.assignedNodes({flatten: false}), [outerSlot, innerChild], 'assignedNodes({flatten: false}) on a default slot must return the assigned nodes');
    assert_array_equals(innerSlot.assignedNodes({flatten: true}), [outerChild, innerChild], 'assignedNodes({flatten: true}) on a default slot must return the distributed nodes');

    outerSlot.name = 'foo';
    assert_array_equals(outerSlot.assignedNodes(), [], 'assignedNodes() on a named slot must return an empty array if there are no matching elements');
    assert_array_equals(outerSlot.assignedNodes({flatten: false}), [], 'assignedNodes({flatten: false}) on a named slot must return an empty array if there are no matching elements');
    assert_array_equals(outerSlot.assignedNodes({flatten: true}), [], 'assignedNodes({flatten: true}) on a named slot must return an empty array if there are no matching elements');

    assert_array_equals(innerSlot.assignedNodes(), [outerSlot, innerChild], 'assignedNodes() on a default slot must return the assigned nodes');
    assert_array_equals(innerSlot.assignedNodes({flatten: false}), [outerSlot, innerChild], 'assignedNodes({flatten: false}) on a default slot must return the assigned nodes');
    assert_array_equals(innerSlot.assignedNodes({flatten: true}), [innerChild], 'assignedNodes({flatten: true}) on a default slot must return the distributed nodes');

    outerChild.slot = 'foo';
    assert_array_equals(outerSlot.assignedNodes(), [outerChild], 'assignedNodes() on a named slot must return matching elements');
    assert_array_equals(outerSlot.assignedNodes({flatten: false}), [outerChild], 'assignedNodes({flatten: false}) on a named slot must return matching elements');
    assert_array_equals(outerSlot.assignedNodes({flatten: true}), [outerChild], 'assignedNodes({flatten: true}) on a named slot must return matching elements');

    assert_array_equals(innerSlot.assignedNodes(), [outerSlot, innerChild], 'assignedNodes() on a default slot must return the assigned nodes');
    assert_array_equals(innerSlot.assignedNodes({flatten: false}), [outerSlot, innerChild], 'assignedNodes({flatten: false}) on a default slot must return the assigned nodes');
    assert_array_equals(innerSlot.assignedNodes({flatten: true}), [outerChild, innerChild], 'assignedNodes({flatten: true}) on a default slot must return the distributed nodes');

    var newInnerSlot = document.createElement('slot');
    innerShadow.insertBefore(newInnerSlot, innerSlot);
    assert_array_equals(newInnerSlot.assignedNodes(), [outerSlot, innerChild], 'assignedNodes() on a default slot must return the assigned nodes');
    assert_array_equals(newInnerSlot.assignedNodes({flatten: false}), [outerSlot, innerChild], 'assignedNodes({flatten: false}) on a default slot must return the assigned nodes');
    assert_array_equals(newInnerSlot.assignedNodes({flatten: true}), [outerChild, innerChild], 'assignedNodes({flatten: true}) on a default slot must return the distributed nodes');

    assert_array_equals(innerSlot.assignedNodes(), [], 'assignedNodes() on a nameless slot element which appears after a default slot must return an empty array');
    assert_array_equals(innerSlot.assignedNodes({flatten: false}), [], 'assignedNodes({flatten: false}) on a nameless slot element which appears after a default slot must return an empty array');
    assert_array_equals(innerSlot.assignedNodes({flatten: true}), [], 'assignedNodes({flatten: true}) on a nameless slot element which appears after a default slot must return an empty array');

    innerShadow.removeChild(newInnerSlot);
    assert_array_equals(newInnerSlot.assignedNodes(), [], 'assignedNodes() must return an empty array when the slot element is not in any tree');
    assert_array_equals(newInnerSlot.assignedNodes({flatten: false}), [], 'assignedNodes({flatten: false}) must return an empty array when the slot element is not in any tree');
    assert_array_equals(newInnerSlot.assignedNodes({flatten: true}), [], 'assignedNodes({flatten: true}) must return an empty array when the slot element is not in any tree');

    assert_array_equals(innerSlot.assignedNodes(), [outerSlot, innerChild], 'assignedNodes() on a default slot must return the assigned nodes');
    assert_array_equals(innerSlot.assignedNodes({flatten: false}), [outerSlot, innerChild], 'assignedNodes({flatten: false}) on a default slot must return the assigned nodes');
    assert_array_equals(innerSlot.assignedNodes({flatten: true}), [outerChild, innerChild], 'assignedNodes({flatten: true}) on a default slot must return the distributed nodes');

}, 'assignedNodes({flatten: true}) must return the distributed nodes, and assignedNodes() and assignedNodes({flatten: false}) must returned the assigned nodes');

</script>
</body>
</html>