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skip comment nodes for placeChild #4128

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merged 3 commits into from
Dec 29, 2023
Merged

skip comment nodes for placeChild #4128

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857ba60
skip comment nodes for placeChild
JoviDeCroock Sep 7, 2023
0f12d8d
golf
JoviDeCroock Nov 10, 2023
b1c6ce5
Merge branch 'main' into skip-comment-nodes
JoviDeCroock Dec 29, 2023
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6 changes: 5 additions & 1 deletion src/diff/children.js
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Original file line number Diff line number Diff line change
Expand Up @@ -367,7 +367,11 @@ function insert(parentVNode, oldDom, parentDom) {
oldDom = parentVNode._dom;
}

return oldDom && oldDom.nextSibling;
do {
oldDom = oldDom && oldDom.nextSibling;
} while (oldDom != null && oldDom.nodeType === 8);

return oldDom;
}

/**
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11 changes: 10 additions & 1 deletion test/browser/hydrate.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -50,11 +50,11 @@ describe('hydrate()', () => {
beforeEach(() => {
scratch = setupScratch();
attributesSpy = spyOnElementAttributes();
clearLog();
});

afterEach(() => {
teardown(scratch);
clearLog();
});

it('should reuse existing DOM', () => {
Expand Down Expand Up @@ -92,6 +92,7 @@ describe('hydrate()', () => {
scratch
);
expect(scratch.innerHTML).to.equal('<p><i>0</i><b>1</b></p>');
expect(getLog()).to.deep.equal(['Comment.remove()']);
});

it('should reuse existing DOM when given components', () => {
Expand Down Expand Up @@ -458,5 +459,13 @@ describe('hydrate()', () => {
scratch.innerHTML = '<p>hello <!-- c -->foo</p>';
hydrate(<p>hello {'foo'}</p>, scratch);
expect(scratch.innerHTML).to.equal('<p>hello foo</p>');
expect(getLog()).to.deep.equal(['Comment.remove()']);
});

it('should skip over multiple comment nodes', () => {
scratch.innerHTML = '<p>hello <!-- a --><!-- b -->foo</p>';
hydrate(<p>hello {'foo'}</p>, scratch);
expect(scratch.innerHTML).to.equal('<p>hello foo</p>');
expect(getLog()).to.deep.equal(['Comment.remove()', 'Comment.remove()']);
});
});
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