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Add the data-callback attribute #854

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Add the data-callback attribute #854

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13 changes: 13 additions & 0 deletions ADVANCED-USAGE.md
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Expand Up @@ -156,6 +156,19 @@ your website. Make sure that your users are aware of this.

For more details, see [creating new themes][creating-new-themes].

### `data-callback`

The callback function will be invoked after loading the `iframe`.

```html
<script src="https://giscus.app/client.js"
data-repo="giscus/giscus"
...
data-callback="console.log('iframe loaded')"
...>
</script>
```

## `<meta>` tags

Your website can define additional `<meta>` tags to help giscus gather the
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2 changes: 2 additions & 0 deletions client.ts
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Expand Up @@ -88,6 +88,7 @@
const locale = attributes.lang ? `/${attributes.lang}` : '';
const src = `${giscusOrigin}${locale}/widget?${new URLSearchParams(params)}`;
const loading = attributes.loading === 'lazy' ? 'lazy' : undefined;
const onload = attributes.callback ?? undefined;

// Set up iframe element
const iframeElement = document.createElement('iframe');
Expand All @@ -98,6 +99,7 @@
allow: 'clipboard-write',
src,
loading,
onload,
};
Object.entries(iframeAttributes).forEach(
([key, value]) => value && iframeElement.setAttribute(key, value),
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