diff --git a/scribe.js b/scribe.js
index 2ca4dce..c7e0af1 100644
--- a/scribe.js
+++ b/scribe.js
@@ -98,10 +98,14 @@ const extractText = async (files, langs = ['eng'], outputFormat = 'txt', options
  * @public
  */
 async function writeDebugImages(ctx, compDebugArrArr, filePath) {
-  await drawDebugImages({ ctx, compDebugArrArr, context: 'node' });
-  const buffer0 = ctx.canvas.toBuffer('image/png');
-  const fs = await import('fs');
-  fs.writeFileSync(filePath, buffer0);
+  if (typeof process === 'undefined') {
+    throw new Error('This function is only available in Node.js.');
+  } else {
+    await drawDebugImages({ ctx, compDebugArrArr, context: 'node' });
+    const buffer0 = ctx.canvas.toBuffer('image/png');
+    const fs = await import('fs');
+    fs.writeFileSync(filePath, buffer0);
+  }
 }
 
 /**
@@ -111,39 +115,43 @@ async function writeDebugImages(ctx, compDebugArrArr, filePath) {
  * @returns
  */
 async function dumpDebugImages(dir) {
-  if (typeof process === 'undefined') throw new Error('This function is only available in Node.js.');
-
-  if (!DebugData.debugImg.Combined || DebugData.debugImg.Combined.length === 0) {
-    console.log('No debug images to dump.');
-    return;
-  }
+  if (typeof process === 'undefined') {
+    throw new Error('This function is only available in Node.js.');
+  } else {
+    if (!DebugData.debugImg.Combined || DebugData.debugImg.Combined.length === 0) {
+      console.log('No debug images to dump.');
+      return;
+    }
 
-  const { createCanvas } = await import('canvas');
-  const canvasAlt = createCanvas(200, 200);
-  const ctxDebug = canvasAlt.getContext('2d');
+    const { createCanvas } = await import('canvas');
+    const canvasAlt = createCanvas(200, 200);
+    const ctxDebug = canvasAlt.getContext('2d');
 
-  for (const [name, imgArr] of Object.entries(DebugData.debugImg)) {
-    if (!imgArr || imgArr.length === 0) continue;
-    for (let i = 0; i < imgArr.length; i++) {
-      const filePath = `${dir}/${name}_${i}.png`;
-      await writeDebugImages(ctxDebug, [imgArr[i]], filePath);
+    for (const [name, imgArr] of Object.entries(DebugData.debugImg)) {
+      if (!imgArr || imgArr.length === 0) continue;
+      for (let i = 0; i < imgArr.length; i++) {
+        const filePath = `${dir}/${name}_${i}.png`;
+        await writeDebugImages(ctxDebug, [imgArr[i]], filePath);
+      }
     }
   }
 }
 
 async function dumpHOCR(dir) {
-  if (typeof process === 'undefined') throw new Error('This function is only available in Node.js.');
-
-  const activeCurrent = ocrAll.active;
+  if (typeof process === 'undefined') {
+    throw new Error('This function is only available in Node.js.');
+  } else {
+    const activeCurrent = ocrAll.active;
+
+    const fs = await import('fs');
+    for (const [name, pages] of Object.entries(ocrAll)) {
+      ocrAll.active = pages;
+      const hocrStr = await exportData('hocr');
+      fs.writeFileSync(`${dir}/${name}.hocr`, hocrStr);
+    }
 
-  const fs = await import('fs');
-  for (const [name, pages] of Object.entries(ocrAll)) {
-    ocrAll.active = pages;
-    const hocrStr = await exportData('hocr');
-    fs.writeFileSync(`${dir}/${name}.hocr`, hocrStr);
+    ocrAll.active = activeCurrent;
   }
-
-  ocrAll.active = activeCurrent;
 }
 
 class data {