86 lines
2.5 KiB
Markdown
86 lines
2.5 KiB
Markdown
```typescript title="WASM"
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import { extractFromFile, initWasm } from "@kreuzberg/wasm";
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await initWasm();
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const fileInput = document.getElementById("file") as HTMLInputElement;
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const file = fileInput.files?.[0];
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if (file) {
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const result = await extractFromFile(file);
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console.log(`Metadata: ${JSON.stringify(result.metadata)}`);
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// Access common metadata fields
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if (result.metadata.title) {
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console.log(`Title: ${result.metadata.title}`);
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}
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// Access format-specific metadata
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const metadata = result.metadata;
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// For HTML files
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if (metadata.html) {
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const htmlMeta = metadata.html;
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console.log(`HTML Title: ${htmlMeta.title}`);
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console.log(`Description: ${htmlMeta.description}`);
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// Access keywords as array
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if (htmlMeta.keywords && htmlMeta.keywords.length > 0) {
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console.log(`Keywords: ${htmlMeta.keywords.join(", ")}`);
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}
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// Access canonical URL
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if (htmlMeta.canonical_url) {
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console.log(`Canonical URL: ${htmlMeta.canonical_url}`);
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}
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// Access Open Graph fields
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if (htmlMeta.open_graph) {
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if (htmlMeta.open_graph["title"]) {
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console.log(`OG Title: ${htmlMeta.open_graph["title"]}`);
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}
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if (htmlMeta.open_graph["image"]) {
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console.log(`OG Image: ${htmlMeta.open_graph["image"]}`);
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}
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}
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// Access Twitter Card fields
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if (htmlMeta.twitter_card && htmlMeta.twitter_card["card"]) {
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console.log(`Twitter Card Type: ${htmlMeta.twitter_card["card"]}`);
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}
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// Access headers
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if (htmlMeta.headers && htmlMeta.headers.length > 0) {
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console.log(`Headers: ${htmlMeta.headers.map((h: any) => h.text).join(", ")}`);
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}
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// Access links
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if (htmlMeta.links && htmlMeta.links.length > 0) {
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htmlMeta.links.forEach((link: any) => {
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console.log(`Link: ${link.href} (${link.text})`);
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});
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}
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// Access images
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if (htmlMeta.images && htmlMeta.images.length > 0) {
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htmlMeta.images.forEach((image: any) => {
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console.log(`Image: ${image.src}`);
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});
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}
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// Access structured data
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if (htmlMeta.structured_data && htmlMeta.structured_data.length > 0) {
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console.log(`Structured data items: ${htmlMeta.structured_data.length}`);
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}
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}
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// PDF-specific fields are at the top level of metadata
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if (metadata.pageCount) {
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console.log(`Pages: ${metadata.pageCount}`);
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}
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if (metadata.authors && metadata.authors.length > 0) {
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console.log(`Authors: ${metadata.authors.join(", ")}`);
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}
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}
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```
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