Aspose.PDF for JavaScript via C++ 25.11

OleksandrAndriienko · OleksandrAndriienko · commit 8f7294b1a433 · 2025-11-27T15:50:56.000+01:00
diff --git a/AsposePDFforJS.js b/AsposePDFforJS.js
diff --git a/AsposePDFforJS.wasm.zip b/AsposePDFforJS.wasm.zip
diff --git a/README.md b/README.md
@@ -16,6 +16,7 @@ Add PDF processing, manipulation, and conversion features to your front-end appl
 - **Add or extract images** to and from PDF documents; remove or replace images when needed.
 - **Concatenate**, **split**, or **reorganize** PDF files; delete specific or blank pages.
 - **Linearize** PDF documents for web optimization and **optimize** internal structure and resources.
+- **Crop** PDF-pages.
 - **Convert** PDF documents to:
   - **Office formats:** DOC, DOCX, XLS, XLSX, PPTX, DOCX with Enhanced Recognition Mode
   - **Web formats:** SVG, SVG (ZIP), XPS, EPUB
diff --git a/example.html b/example.html
@@ -308,6 +308,10 @@ <h2>Aspose.PDF for JavaScript via C++</h2>
         <label for="filePdfDeleteTables">DEL TABLES<span class="tooltip">Delete tables from a PDF-file</span></label>
         <input type="file" id="filePdfDeleteTables" accept="application/pdf" onchange="ffilePdfDeleteTables(event)">
       </div>
+      <div class="column">
+        <label for="fileCropPages">CROP<span class="tooltip">Crop PDF-pages</span></label>
+        <input type="file" id="fileCropPages" accept="application/pdf" onchange="ffileCropPages(event)">
+      </div>
     </div>
   </div>
 
@@ -1320,6 +1324,17 @@ <h2>Aspose.PDF for JavaScript via C++</h2>
     file_reader.readAsArrayBuffer(e.target.files[0]);
   }
 
+  var ffileCropPages = function (e) {
+    const file_reader = new FileReader();
+    file_reader.onload = (event) => {
+      const json = AsposePdfCropPages(event.target.result, e.target.files[0].name, 2.1, "ResultPdfCropPages.pdf");
+      if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
+      else document.getElementById('output').textContent = json.errorText;
+      DownloadFile(json.fileNameResult, "application/pdf");
+    }
+    file_reader.readAsArrayBuffer(e.target.files[0]);
+  }
+
 </script>
 
 <script>
diff --git a/example_worker.html b/example_worker.html
@@ -97,6 +97,7 @@
       <option value="AsposePdfUnembedFonts">Unembed fonts a PDF-file</option>
       <option value="AsposePdfOptimizeFileSize">Optimize size of PDF-file with image compression quality</option>
       <option value="AsposePdfDeleteTables">Delete tables from a PDF-file</option>
+      <option value="AsposePdfCropPages">Crop PDF-pages</option>
 
     <optgroup label="Metadata PDF">
       <option value="AsposePdfSetInfo">Set info (metadata) in a PDF-file</option>
@@ -334,7 +335,7 @@
             // AsposePdfReplaceFont, AsposePdfDeleteHiddenText, AsposePdfAddWatermark, AsposePdfDeleteWatermarks,
             // AsposePdfMergeLayers, AsposePdfFlatten, AsposePdfReplaceTextPages, AsposePdfMakeBooklet,
             // AsposePdfMakeNUp, AsposePdfDeleteBlankPages, AsposePdfAddStampPages, AsposePdfEmbedFonts, AsposePdfUnembedFonts,
-            // AsposePdfOptimizeFileSize, AsposePdfDeleteTables,
+            // AsposePdfOptimizeFileSize, AsposePdfDeleteTables, AsposePdfCropPages,
             DownloadFile(json.fileNameResult, "application/pdf", params[0]);
         }
       }
@@ -662,6 +663,11 @@
           transfer = [event.target.result];
           params = [event.target.result, ffile.name, imageQuality, `Result${operation}.pdf`];
           break;
+        case 'AsposePdfCropPages':
+          const marginPages = 5;
+          transfer = [event.target.result];
+          params = [event.target.result, ffile.name, marginPages, `Result${operation}.pdf`];
+          break;
         default:
           // AsposePdfOptimize, AsposePdfAddPageNum, AsposePdfConvertToGrayscale, AsposePdfAConvertToPDF,
           // AsposePdfRemoveMetadata, AsposePdfRepair, AsposePdfOptimizeResource, AsposePdfDeleteAnnotations,
diff --git a/snippets/AsposePdfCropPages.html b/snippets/AsposePdfCropPages.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta charset="UTF-8">
+  <title>Aspose.PDF for JavaScript via C++</title>
+</head>
+
+<body>
+  <label for="fileCropPages">Choose a PDF-file to crop PDF-pages</label>
+  <input type="file" id="fileCropPages" accept="application/pdf" onchange="ffileCropPages(event)">
+  <br>
+  <pre id="output"></pre>
+</body>
+<!-- Load and initiate Aspose.PDF for JavaScript via C++ -->
+<script type="text/javascript" async src="AsposePDFforJS.js"></script>
+<script type="text/javascript">
+/// [Code snippet]
+  var ffileCropPages = function (e) {
+    const file_reader = new FileReader();
+    file_reader.onload = (event) => {
+      /*Crop PDF-pages and save the "ResultRotation.pdf"*/
+      const json = AsposePdfCropPages(event.target.result, e.target.files[0].name, 0, "ResultPdfCropPages.pdf");
+      if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult
+      else document.getElementById('output').textContent = json.errorText;
+      /*Make a link to download the result file*/
+      DownloadFile(json.fileNameResult, "application/pdf");
+    };
+    file_reader.readAsArrayBuffer(e.target.files[0]);
+  };
+/// [Code snippet]
+</script>
+
+</html>
diff --git a/snippets/AsposePdfCropPages_worker.html b/snippets/AsposePdfCropPages_worker.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta charset="UTF-8">
+  <title>Aspose.PDF for JavaScript via C++</title>
+</head>
+
+<body>
+  <label for="fileCropPages">Choose a PDF-file to crop PDF-pages</label>
+  <input type="file" id="fileCropPages" accept="application/pdf" onchange="ffileCropPages(event)">
+  <br>
+  <pre id="output">please wait for loading...</pre>
+</body>
+
+<script type="text/javascript">
+/// [Code snippet]
+  /*Create Web Worker*/
+  const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
+  AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
+  AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
+    (evt.data == 'ready') ? 'loaded!' :
+      (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/pdf", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;
+
+  /*Event handler*/
+  const ffileCropPages = e => {
+    const file_reader = new FileReader();
+    file_reader.onload = event => {
+      const margin = 0.5;
+      /*Crop PDF-pages and save the "ResultPdfCropPages.pdf" - Ask Web Worker*/
+      AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfCropPages', "params": [event.target.result, e.target.files[0].name, margin, "ResultPdfCropPages.pdf"] }, [event.target.result]);
+    };
+    file_reader.readAsArrayBuffer(e.target.files[0]);
+  };
+/// [Code snippet]
+
+  /*Make a link to download the result file*/
+  const DownloadFile = (filename, mime, content) => {
+      mime = mime || "application/octet-stream";
+      var link = document.createElement("a"); 
+      link.href = URL.createObjectURL(new Blob([content], {type: mime}));
+      link.download = filename;
+      link.innerHTML = "Click here to download the file " + filename;
+      document.body.appendChild(link); 
+      document.body.appendChild(document.createElement("br"));
+      return filename;
+    }
+</script>
+
+</html>
