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<html>
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<head>
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<script src="/dist/tesseract.dev.js"></script>
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</head>
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<body>
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<div>
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<input type="file" id="uploader">
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<button id="download-pdf" disabled="true">Download PDF</button>
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</div>
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<textarea id="board" readonly rows="8" cols="80">Upload an image file</textarea>
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<script type="module">
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const { createWorker } = Tesseract;
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const worker = await createWorker({
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corePath: '/node_modules/tesseract.js-core',
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workerPath: "/dist/worker.dev.js",
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logger: m => console.log(m),
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});
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const uploader = document.getElementById('uploader');
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const dlBtn = document.getElementById('download-pdf');
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let pdf;
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const recognize = async ({ target: { files } }) => {
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await worker.loadLanguage('eng');
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await worker.initialize('eng');
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const res = await worker.recognize(files[0],{pdfTitle: "Example PDF"},{pdf: true});
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pdf = res.data.pdf;
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const text = res.data.text;
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const board = document.getElementById('board');
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board.value = text;
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dlBtn.disabled = false;
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};
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const downloadPDF = async () => {
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const filename = 'tesseract-ocr-result.pdf';
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const blob = new Blob([new Uint8Array(pdf)], { type: 'application/pdf' });
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if (navigator.msSaveBlob) {
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// IE 10+
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navigator.msSaveBlob(blob, filename);
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} else {
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const link = document.createElement('a');
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if (link.download !== undefined) {
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const url = URL.createObjectURL(blob);
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link.setAttribute('href', url);
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link.setAttribute('download', filename);
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link.style.visibility = 'hidden';
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document.body.appendChild(link);
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link.click();
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document.body.removeChild(link);
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}
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}
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};
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uploader.addEventListener('change', recognize);
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dlBtn.addEventListener('click', downloadPDF);
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</script>
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</body>
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</html>
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