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next.js/packages/next-server/lib
Tim Neutkens 9890e06907
Dedupe only items with unique key (#5800)
Fixes #3705
Fixes #4656

- No longer automatically dedupe certain tags. Only the ones we know are *never* going to be duplicate like charSet, title etc.
- Fix `key=""` behavior, making sure that if a unique key is provided tags are deduped based on that.

For example:

```jsx
<meta property='fb:pages' content='one'>
<meta property='fb:pages' content='two'>
```

Would currently cause

```jsx
<meta property='fb:pages' content='two'>
```

### After this change:

```jsx
<meta property='fb:pages' content='one'>
<meta property='fb:pages' content='two'>
```

Then if you use next/head multiple times / want to be able to override:

```jsx
<meta property='fb:pages' content='one' key="not-unique-key">
<meta property='fb:pages' content='two' key="not-unique-key">
```

Would cause:

```jsx
<meta property='fb:pages' content='two'>
```

As `key` gets deduped correctly after this PR, similar to how React itself works.
2018-12-03 17:28:42 +01:00
..
router Use Typescript to transpile Next.js core files instead of Babel (#5747) 2018-11-28 15:03:02 +01:00
asset.js next-server (#5357) 2018-10-02 00:55:31 +02:00
constants.js Fix linter (#5350) 2018-10-20 17:00:01 +02:00
dynamic.js Remove flow types (#5704) 2018-11-21 16:04:37 +01:00
event-emitter.js Use Typescript to transpile Next.js core files instead of Babel (#5747) 2018-11-28 15:03:02 +01:00
head.js Dedupe only items with unique key (#5800) 2018-12-03 17:28:42 +01:00
loadable-capture.js next-server (#5357) 2018-10-02 00:55:31 +02:00
loadable.js next-server (#5357) 2018-10-02 00:55:31 +02:00
runtime-config.js next-server (#5357) 2018-10-02 00:55:31 +02:00
side-effect.js next-server (#5357) 2018-10-02 00:55:31 +02:00
utils.js Use Typescript to transpile Next.js core files instead of Babel (#5747) 2018-11-28 15:03:02 +01:00