Invalid HTML element nesting is corrected, but only for some elements?

[Hurtak]

It seems that the node-html-parser is doing some kind of correction of elements that have invalid HTML nesting, but only in some cases?

// valid HTML - nesting kept
const parsedA = parse(`<div>foo<div>bar</div></div>`);
console.log(parsedA.outerHTML); // `<div>foo<div>bar</div></div>`

// invalid HTML (p nested inside of p) - nesting changed
const parsedB = parse(`<p>foo<p>bar</p></p>`);
console.log(parsedB.outerHTML); // `<p>foo</p><p>bar</p>`

// invalid HTML (ul nested inside of p) - nesting kept
const parsedB = parse(`<p>foo<ul><li>bar</li></ul></p>`);
console.log(parsedB.outerHTML); // `<p>foo<ul><li>bar</li></ul></p>`

I found this issues #211 from @lehtu that says there is invalid nesting correction, but it only says it fixes the a tag, but the code above suggests that it is also happening for other elements like p? Shouldn't this be consistent - meaning either fix all invalid nesting or do not fix any invalid nesting?

[taoqf]

@Hurtak https://html.spec.whatwg.org/multipage/grouping-content.html#the-p-element According to this, ul,p,div could not nest inside p.
even though, I have added an option preserveTagNesting for this case:

it('Valid HTML p nested inside of p', function () {
	// invalid HTML (p nested inside of p) - nesting changed
	const root = parse(`<p>foo<p>bar</p></p>`, { preserveTagNesting: true });
	root.outerHTML.should.equal('<p>foo<p>bar</p></p>');
});

[Hurtak]

Seems to have fixed the case on our side, thank you for fixing.