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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /preload/modulepreload.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<body>
<script>
host_info = get_host_info();
function verifyNumberOfDownloads(url, number, allowTransferSizeOfZero = false) {
var numDownloads = 0;
let absoluteURL = new URL(url, location.href).href;
performance.getEntriesByName(absoluteURL).forEach(entry => {
if (entry.transferSize > 0 || allowTransferSizeOfZero) {
numDownloads++;
}
});
assert_equals(numDownloads, number, url);
}
function attachAndWaitForLoad(element) {
return new Promise((resolve, reject) => {
element.onload = resolve;
element.onerror = reject;
document.body.appendChild(element);
});
}
function attachAndWaitForError(element) {
return new Promise((resolve, reject) => {
element.onload = reject;
element.onerror = resolve;
document.body.appendChild(element);
});
}
function attachAndWaitForTimeout(element, t) {
return new Promise((resolve, reject) => {
element.onload = reject;
element.onerror = reject;
t.step_timeout(resolve, 1000);
document.body.appendChild(element);
});
}
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/dummy.js?unique';
return attachAndWaitForLoad(link).then(() => {
verifyNumberOfDownloads('resources/dummy.js?unique', 1);
// Verify that <script> doesn't fetch the module again.
var script = document.createElement('script');
script.type = 'module';
script.src = 'resources/dummy.js?unique';
return attachAndWaitForLoad(script);
}).then(() => {
verifyNumberOfDownloads('resources/dummy.js?unique', 1);
});
}, 'link rel=modulepreload');
/**
* Begin tests to ensure crossorigin value behaves the same on
* link rel=modulepreload as it does script elements.
*/
promise_test(function(t) {
document.cookie = 'same=1';
var link = document.createElement('link');
link.rel = 'modulepreload';
link.crossOrigin = 'anonymous';
link.href = 'resources/dummy.js?sameOriginAnonymous';
return attachAndWaitForLoad(link).then(() => {
verifyNumberOfDownloads('resources/dummy.js?sameOriginAnonymous', 1);
// Verify that <script> doesn't fetch the module again.
var script = document.createElement('script');
script.type = 'module';
script.crossOrigin = 'anonymous';
script.src = 'resources/dummy.js?sameOriginAnonymous';
return attachAndWaitForLoad(script);
}).then(() => {
verifyNumberOfDownloads('resources/dummy.js?sameOriginAnonymous', 1);
});
}, 'same-origin link rel=modulepreload crossorigin=anonymous');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.crossOrigin = 'use-credentials';
link.href = 'resources/dummy.js?sameOriginUseCredentials';
return attachAndWaitForLoad(link).then(() => {
verifyNumberOfDownloads('resources/dummy.js?sameOriginUseCredentials', 1);
// Verify that <script> doesn't fetch the module again.
var script = document.createElement('script');
script.type = 'module';
script.crossOrigin = 'use-credentials';
script.src = 'resources/dummy.js?sameOriginUseCredentials';
return attachAndWaitForLoad(script);
}).then(() => {
verifyNumberOfDownloads('resources/dummy.js?sameOriginUseCredentials', 1);
});
}, 'same-origin link rel=modulepreload crossorigin=use-credentials');
promise_test(function(t) {
const setCookiePromise = fetch(
`${host_info.HTTP_REMOTE_ORIGIN}/cookies/resources/set-cookie.py?name=cross&path=/preload/`,
{
mode: 'no-cors',
credentials: 'include',
});
return setCookiePromise.then(() => {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = `${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginNone`;
return attachAndWaitForLoad(link);
}).then(() => {
verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginNone`, 1, true);
// Verify that <script> doesn't fetch the module again.
var script = document.createElement('script');
script.type = 'module';
script.src = `${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginNone`;
return attachAndWaitForLoad(script);
}).then(() => {
verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginNone`, 1, true);
});
}, 'cross-origin link rel=modulepreload');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.crossOrigin = 'anonymous';
link.href = `${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginAnonymous`;
return attachAndWaitForLoad(link).then(() => {
verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginAnonymous`, 1, true);
// Verify that <script> doesn't fetch the module again.
var script = document.createElement('script');
script.type = 'module';
script.crossOrigin = 'anonymous';
script.src = `${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginAnonymous`;
return attachAndWaitForLoad(script);
}).then(() => {
verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginAnonymous`, 1, true);
});
}, 'cross-origin link rel=modulepreload crossorigin=anonymous');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.crossOrigin = 'use-credentials';
link.href = `${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginUseCredentials`;
return attachAndWaitForLoad(link).then(() => {
verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginUseCredentials`, 1, true);
// Verify that <script> doesn't fetch the module again.
var script = document.createElement('script');
script.type = 'module';
script.crossOrigin = 'use-credentials';
script.src = `${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginUseCredentials`;
return attachAndWaitForLoad(script);
}).then(() => {
verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginUseCredentials`, 1, true);
});
}, 'cross-origin link rel=modulepreload crossorigin=use-credentials');
/**
* End link rel=modulepreload crossorigin attribute tests.
*/
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/module1.js?submodule';
return attachAndWaitForLoad(link).then(() => {
verifyNumberOfDownloads('resources/module1.js?submodule', 1);
// The load event fires before (optional) submodules fetch.
verifyNumberOfDownloads('resources/module2.js', 0);
var script = document.createElement('script');
script.type = 'module';
script.src = 'resources/module1.js?submodule';
return attachAndWaitForLoad(script);
}).then(() => {
verifyNumberOfDownloads('resources/module1.js?submodule', 1);
verifyNumberOfDownloads('resources/module2.js', 1);
});
}, 'link rel=modulepreload with submodules');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/syntax-error.js';
return attachAndWaitForLoad(link);
}, 'link rel=modulepreload for a module with syntax error');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/not-exist.js';
return attachAndWaitForError(link);
}, 'link rel=modulepreload for a module with network error');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = null;
return attachAndWaitForError(link);
}, 'link rel=modulepreload with bad href attribute');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/module1.js?as-script';
link.as = 'script'
return attachAndWaitForLoad(link);
}, 'link rel=modulepreload as=script');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/module1.js?as-image';
link.as = 'image'
return attachAndWaitForError(link);
}, 'link rel=modulepreload with non-script-like as= value (image)');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/module1.js?as-xslt';
link.as = 'xslt'
return attachAndWaitForError(link);
}, 'link rel=modulepreload with non-script-like as= value (xslt)');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/module1.js?integrity-match';
link.integrity = 'sha256-+Ks3iNIiTq2ujlWhvB056cmXobrCFpU9hd60xZ1WCaA='
return attachAndWaitForLoad(link);
}, 'link rel=modulepreload with integrity match');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/module1.mjs?integrity-match';
link.integrity = 'sha256-+Ks3iNIiTq2ujlWhvB056cmXobrCFpU9hd60xZ1WCaA='
return attachAndWaitForLoad(link);
}, 'link rel=modulepreload with integrity match2');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/module1.js?integrity-doesnotmatch';
link.integrity = 'sha384-doesnotmatch'
return attachAndWaitForError(link);
}, 'link rel=modulepreload with integrity mismatch');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/module1.mjs?integrity-doesnotmatch';
link.integrity = 'sha256-dOxReWMnMSPfUvxEbBqIrjNh8ZN8n05j7h3JmhF8gQc='
return attachAndWaitForError(link);
}, 'link rel=modulepreload with integrity mismatch2');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/module1.mjs?integrity-invalid';
link.integrity = 'sha256-dOxReWMnMSPfUvxEbBqIrjNh8ZN8n05j7h3JmhF8gQc=%'
return attachAndWaitForError(link);
}, 'link rel=modulepreload with integrity mismatch3');
promise_test(function(t) {
var link1 = document.createElement('link');
var link2 = document.createElement('link');
link1.rel = 'modulepreload';
link2.rel = 'modulepreload';
link1.href = 'resources/module1.js?same-url';
link2.href = 'resources/module1.js?same-url';
return Promise.all([
attachAndWaitForLoad(link1),
attachAndWaitForLoad(link2),
]);
}, 'multiple link rel=modulepreload with same href');
promise_test(function(t) {
var link1 = document.createElement('link');
var link2 = document.createElement('link');
link1.rel = 'modulepreload';
link2.rel = 'modulepreload';
link1.href = 'resources/module2.js?child-before';
link2.href = 'resources/module1.js?child-before';
return attachAndWaitForLoad(link1)
.then(() => attachAndWaitForLoad(link2))
.then(() => new Promise(r => t.step_timeout(r, 1000)))
.then(() => {
verifyNumberOfDownloads('resources/module2.js?child-before', 1);
});
}, 'multiple link rel=modulepreload with child module before parent');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/module1.mjs?matching-media';
link.media = 'all';
return attachAndWaitForLoad(link);
}, 'link rel=modulepreload with matching media');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/module1.mjs?non-matching-media';
link.media = 'not all';
return attachAndWaitForTimeout(link, t);
}, 'link rel=modulepreload with non-matching media');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = 'resources/module1.mjs?empty-media';
link.media = '';
return attachAndWaitForLoad(link);
}, 'link rel=modulepreload with empty media');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = '';
return attachAndWaitForTimeout(link, t);
}, 'link rel=modulepreload with empty href');
promise_test(function(t) {
var link = document.createElement('link');
link.rel = 'modulepreload';
link.href = '';
link.as = 'fetch';
return attachAndWaitForTimeout(link, t);
}, 'link rel=modulepreload with empty href and invalid as= value');
promise_test(function(t) {
var link = document.createElement('link');
var script = document.createElement('script');
link.rel = 'modulepreload';
script.type = 'module';
link.href = 'resources/module1.mjs?non-matching-crossorigin';
script.src = link.href;
script.crossOrigin = 'anonymous';
document.body.append(link);
return attachAndWaitForLoad(script);
}, 'link rel=modulepreload and script with non-matching crossorigin values');
promise_test(function(t) {
var link = document.createElement('link');
var script = document.createElement('script');
link.rel = 'modulepreload';
script.type = 'module';
link.href = 'resources/module1.mjs?non-matching-crossorigin';
script.src = link.href;
link.crossOrigin = 'anonymous';
script.crossOrigin = 'use-credentials';
document.body.append(link);
return attachAndWaitForLoad(script);
}, 'link rel=modulepreload and script with non-matching crossorigin values2');
promise_test(function(t) {
var link = document.createElement('link');
var moduleScript = document.createElement('script');
var classicScript = document.createElement('script');
link.rel = 'modulepreload';
moduleScript.type = 'module';
link.href = 'resources/dummy.js?non-module script';
classicScript.src = link.href;
moduleScript.src = link.href;
document.body.append(link);
document.body.append(classicScript);
return attachAndWaitForLoad(moduleScript);
}, 'link rel=modulepreload and non-module script');
</script>
</body>