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fix(pat-inject): Fix problem with inserting table rows. #1238

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Apr 3, 2025
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fix(pat-inject): Fix problem with inserting table rows. #1238

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6 changes: 3 additions & 3 deletions src/pat/inject/inject.js
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Original file line number Diff line number Diff line change
Expand Up @@ -459,15 +459,15 @@ const inject = {
/* Called after the XHR has succeeded and we have a new $sources
* element to inject.
*/
const wrapper = document.createElement("div");
const wrapper = document.createElement("template");
if ($sources.length > 0) {
const method = cfg.sourceMod === "content" ? "innerHTML" : "outerHTML";
// There might be multiple sources, so we need to loop over them.
// Access them with "innerHTML" or "outerHTML" depending on the sourceMod.
const sources_string = [...$sources].map(source => source[method]).join("\n");
wrapper.innerHTML = sources_string;

for (const img of wrapper.querySelectorAll("img")) {
for (const img of wrapper.content.querySelectorAll("img")) {
events.add_event_listener(
img,
"load",
Expand All @@ -481,7 +481,7 @@ const inject = {
}

// Copy, because after insertion wrapper.children is empty.
const source_nodes = [...wrapper.childNodes];
const source_nodes = [...wrapper.content.childNodes];

// Now the injection actually happens.
if (this._inject(trigger, source_nodes, target, cfg)) {
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55 changes: 55 additions & 0 deletions src/pat/inject/inject.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1868,6 +1868,61 @@ describe("pat-inject", function () {
});
});

describe("9.6 - injecting tables.", function () {
let spy_ajax;

beforeEach(function () {
spy_ajax = jest.spyOn($, "ajax").mockImplementation(() => deferred);
});

afterEach(function () {
spy_ajax.mockRestore();
});

it("9.6.1 - Correctly injects table rows", async function () {
// Table rows <tr> can only be childs of <tbodys> or <thead> elements.
// If they are childs of <table> elements, the browser implicitly adds a <tbody> element.
// Table rows cannot be childs of <div> elements or others.
// There is one exception though - they can be directly added to <template> elements.
// This test checks this problem which popped up during the 9.10 release cycle and was fixed in:
// https://github.com/Patternslib/Patterns/pull/1238

document.body.innerHTML = `
<a class="pat-inject"
href="test.html"
data-pat-inject="
source: tr::element;
target: table;
">link</a>
<table>
</table>
`;

answer(`
<html>
<body>
<table>
<tr><td>wohoo</td></tr>
</table>
</body>
</html>
`);

const inject = document.querySelector(".pat-inject");

pattern.init($(inject));
await utils.timeout(1); // wait a tick for async to settle.

inject.click();
await utils.timeout(1); // wait a tick for async to settle.


console.log(document.body.outerHTML);

const injected = document.querySelectorAll("table tr");
expect(injected.length).toBe(1);
});
});
});

describe("10 - Error handling", () => {
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