Lazy loading of PDF documents (#37) (#38)

2026-09-09 11:29:14 -04:00 · 2024-10-18 04:05:31 +00:00
parent 022ea7da87
commit f24e611c4e
1 changed files with 7 additions and 2 deletions
@@ -105,9 +105,14 @@ const makeTOCItem = item => ({
 })

 export const makePDF = async file => {
-    const data = new Uint8Array(await file.arrayBuffer())
+    const transport = new pdfjsLib.PDFDataRangeTransport(file.size, [])
+    transport.requestDataRange = (begin, end) => {
+        file.slice(begin, end).arrayBuffer().then(chunk => {
+            transport.onDataRange(begin, chunk)
+        })
+    }
    const pdf = await pdfjsLib.getDocument({
-        data,
+        range: transport,
        cMapUrl: pdfjsPath('cmaps/'),
        standardFontDataUrl: pdfjsPath('standard_fonts/'),
        isEvalSupported: false,