Pawel Kozlowski f2dc32e5c7 fix(core): don't wrap <tr> and <col> elements into a required parent (#29219)
BREAKING CHANGE:

Certain elements (like `<tr>` or `<col>`) require parent elements to be of a certain type by the HTML specification
(ex. <tr> can only be inside <tbody> / <thead>). Before this change Angular template parser was auto-correcting
"invalid" HTML using the following rules:
- `<tr>` would be wrapped in `<tbody>` if not inside `<tbody>`, `<tfoot>` or `<thead>`;
- `<col>` would be wrapped in `<colgroup>` if not inside `<colgroup>`.

This meachanism of automatic wrapping / auto-correcting was problematic for several reasons:
- it is non-obvious and arbitrary (ex. there are more HTML elements that has rules for parent type);
- it is incorrect for cases where `<tr>` / `<col>` are at the root of a component's content, ex.:

```html
<projecting-tr-inside-tbody>
  <tr>...</tr>
</projecting-tr-inside-tbody>
```

In the above example the `<projecting-tr-inside-tbody>` component culd be "surprised" to see additional
`<tbody>` elements inserted by Angular HTML parser.

PR Close #29219
2019-03-14 03:07:01 -04:00
2019-01-11 11:15:59 -08:00

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