Bug 255764 – Support of multiple contexts for JSON+LD content in script element (square brackets)

• Status: RESOLVED
• Resolution: MOVED
• Component: JavaScriptCore

[Karl Dubost]

The advanced context usage for JSON+LD authorizes the use of an array.
https://w3c.github.io/json-ld-syntax/#advanced-context-usage

Nothing is said in the section about a restriction in embedding JSON+LD in html documents
https://w3c.github.io/json-ld-syntax/#embedding-json-ld-in-html-documents


So the square bracket syntax is failing in Safari:

```
data:text/html,%20%20%20%20<script%20type="application/ld+json">[{"@context":%20"https://schema.org"}]</script>
```

with 

```
TypeError: undefined is not an object (evaluating 'r["@context"].toLowerCase')
```

while this is working.

```
<script type="application/ld+json">{"@context": "https://schema.org"}</script>
```

The minimal test case to reproduce the issue is

```
<script type="application/ld+json">[]</script>
```


In both Chrome and Firefox, this syntax is accepted.

[Radar WebKit Bug Importer]

<rdar://problem/108352610>

[Karl Dubost]

I have moved the radar to Safari, as this is not handled on WebKit side, but Safari side.

[Xidorn Quan]

Karl, is there anywhere the progress of the issue can be tracked publicly?

[Karl Dubost]

Oh yes I dropped the ball about that. 

So one side WebKit doesn't suport JSON+LD in the engine.
And the other Safari just needs the data as-is, so basically not to evaluate but just load it. 

Let see if there's an intermediary solution here.

[Karl Dubost]

Xidorn, 
Do you know about an app or a current website with a usage for this construct/syntax?

[Xidorn Quan]

Yes, Canva's logout templates page currently uses this syntax: https://www.canva.com/templates/ (If you have Canva account, you need to logout or use private mode to access).

I think we are fixing it, so I can't say how long it would keep being like it. Its current content is:
```
[{"@context":"https:\u002F\u002Fschema.org","@type":"WebSite","url":"https:\u002F\u002Fwww.canva.com\u002Ftemplates\u002F","potentialAction":[{"@type":"SearchAction","target":"https:\u002F\u002Fwww.canva.com\u002Ftemplates\u002Ftemplates\u002F?query={search_term_string}","query-input":"required name=search_term_string"}]}]
```

[Karl Dubost]

Thanks a lot!

[Karl Dubost]

Xidorn, this is still being discussed to find the origin of the issue and if it is something to fix on Safari side.

[Karl Dubost]

Xidorn, this is still being discussed to find the origin of the issue and if it is something to fix on Safari side.