Source code
Revision control
Copy as Markdown
Other Tools
Test Info:
- This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/the-img-element/Image-constructor.html - WPT Dashboard Interop Dashboard
<!DOCTYPE HTML>
<title>DOM Image constructor Test</title>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
<meta name="assert" content="Tests the Image constructor for the img-element">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
test(function() {
var img = new Image();
assert_true(img != undefined);
}, "Image constructor works");
test(function() {
assert_equals(Image.prototype, HTMLImageElement.prototype);
}, "Image and HTMLImageElement share a prototype");
test(function() {
assert_true((new Image()).localName === "img");
}, "Image localName is img");
test(function() {
}, "Image namespace URI is correct");
test(function() {
assert_equals(Image.name, "Image", "Image name should be Image (not HTMLImageElement)");
assert_equals(Object.getPrototypeOf(Image), Function.prototype, "Image's prototype is Function.prototype");
assert_equals(Image.prototype, HTMLImageElement.prototype, "Image.prototype is same as HTMLImageElement.prototype");
assert_equals(Object.getPrototypeOf(new Image()), HTMLImageElement.prototype, "new Image()'s prototype is HTMLImageElement.prototype ");
assert_equals(Object.getPrototypeOf(Image.prototype), HTMLElement.prototype, "Image.prototype's prototype is HTMLElement.prototype");
const desc = Object.getOwnPropertyDescriptor(Image, "prototype");
assert_false(desc.configurable, "Image.prototype is not configurable");
assert_false(desc.enumerable, "Image.prototype is not enumerable");
assert_false(desc.writable, "Image.prototype is not writable");
}, "NamedConstructor creates the correct object structure.");
</script>