55 lines
1.6 KiB
Markdown
55 lines
1.6 KiB
Markdown
---
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title: Schema previews
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intro: 'You can preview upcoming features and changes to the {% data variables.product.prodname_dotcom %} GraphQL schema before they are added to the {% data variables.product.prodname_dotcom %} GraphQL API.'
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redirect_from:
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- /v4/previews
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versions:
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fpt: '*'
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ghec: '*'
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ghes: '*'
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ghae: '*'
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topics:
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- API
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---
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## About schema previews
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During the preview period, we may change some features based on developer feedback. If we do make changes, we'll announce them on the [developer blog](https://developer.github.com/changes/) without advance notice.
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To access a schema preview, you'll need to provide a custom [media type](/rest/overview/media-types) in the `Accept` header for your requests. Feature documentation for each preview specifies which custom media type to provide.
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{% note %}
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**Note:** The GraphQL schema members under preview cannot be accessed via the Explorer at this time.
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{% endnote %}
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{% for preview in graphql.previewsForCurrentVersion %}
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## {{ preview.title }}
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{{ preview.description }}
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To toggle this preview and access the following schema members, you must provide a custom media type in the `Accept` header:
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```
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{{ preview.accept_header }}
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```
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Previewed schema members:
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{% for schemaMemberPath in preview.toggled_on %}
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- `{{ schemaMemberPath }}`
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{% endfor %}
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{% if preview.announcement %}
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**Announced:** [{{ preview.announcement.date }}]({{ preview.announcement.url }})
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{% endif %}
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{% if preview.updates %}
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{% for update in preview.updates %}
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**Updated:** [{{ update.date }}]({{ update.url }})
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{% endfor %}
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{% endif %}
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{% endfor %}
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