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docs(ivy): add anchor-node insert before/after difference (#35207) 

PR Close #35207
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Misko Hevery 2020-02-06 20:59:19 -08:00
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aio/content/guide/ivy-compatibility.md
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@ -82,3 +82,9 @@ Please note that these constants are not meant to be used by 3rd party library o
* `DebugElement.classes` returns `undefined` for classes that were added and then subsequently removed (previously, classes added and later removed would have a value of `false`). * `DebugElement.classes` returns `undefined` for classes that were added and then subsequently removed (previously, classes added and later removed would have a value of `false`).
* If selecting the native `<option>` element in a `<select>` where the `<option>`s are created via `*ngFor`, use the `[selected]` property of an `<option>` instead of binding to the `[value]` property of the `<select>` element (previously, you could bind to either.) [details](guide/ivy-compatibility-examples#select-value-binding) * If selecting the native `<option>` element in a `<select>` where the `<option>`s are created via `*ngFor`, use the `[selected]` property of an `<option>` instead of binding to the `[value]` property of the `<select>` element (previously, you could bind to either.) [details](guide/ivy-compatibility-examples#select-value-binding)
* Embedded views (such as ones created by `*ngFor`) are now inserted in front of anchor DOM comment node (e.g. `<!--ng-for-of-->`) rather than behind it as was the case previously.
In most cases this does not have any impact on rendered DOM.
In some cases (such as animations delaying the removal of an embedded view) any new embedded views will be inserted after the embedded view being animated away.
This difference only last while the animation is active, and might alter the visual appearance of the animation.
Once the animation is finished the resulting rendered DOM is identical to that rendered with View Engine.