diff --git a/packages/api/src/console.ts b/packages/api/src/console.ts
index 2ce46088..ef0351a4 100644
--- a/packages/api/src/console.ts
+++ b/packages/api/src/console.ts
@@ -97,10 +97,11 @@ export class MiaoScriptConsole implements Console {
                     MiaoScriptConsole.sourceMaps[fileName] = null
                     let sourceLine = base.read(fileName).split('\n')
                     let lastLine = sourceLine[sourceLine.length - 1]
+                    // lastLine is similar //# sourceMappingURL=data:application/json;base64,
                     if (lastLine.startsWith('//# sourceMappingURL=')) {
                         let sourceContent = null
                         let sourceMappingURL = lastLine.split('sourceMappingURL=', 2)[1]
-                        if (sourceMappingURL.startsWith('data:application/jsonbase64,')) {
+                        if (sourceMappingURL.startsWith('data:application/json;base64,')) {
                             sourceContent = String.fromCharCode(...Array.from(base64.toByteArray(sourceMappingURL.split(',', 2)[1])))
                         } else if (sourceMappingURL.startsWith('http')) {
                             // TODO
@@ -122,6 +123,9 @@ export class MiaoScriptConsole implements Console {
             }
         } catch (error) {
             console.debug('search source map', fileName, 'line', lineNumber, 'error:', error)
+            if (global.debug) {
+                console.ex(error)
+            }
         }
         return {
             fileName,
diff --git a/packages/common/src/qrcode.ts b/packages/common/src/qrcode.ts
index c5a11466..ac816743 100644
--- a/packages/common/src/qrcode.ts
+++ b/packages/common/src/qrcode.ts
@@ -504,22 +504,22 @@ export enum QRErrorCorrectLevel {
 // QRMaskPattern
 //---------------------------------------------------------------------
 
-var QRMaskPattern = {
-    PATTERN000: 0,
-    PATTERN001: 1,
-    PATTERN010: 2,
-    PATTERN011: 3,
-    PATTERN100: 4,
-    PATTERN101: 5,
-    PATTERN110: 6,
-    PATTERN111: 7
+export enum QRMaskPattern {
+    PATTERN000 = 0,
+    PATTERN001 = 1,
+    PATTERN010 = 2,
+    PATTERN011 = 3,
+    PATTERN100 = 4,
+    PATTERN101 = 5,
+    PATTERN110 = 6,
+    PATTERN111 = 7
 }
 
 //---------------------------------------------------------------------
 // QRUtil
 //---------------------------------------------------------------------
 
-var QRUtil = {
+export const QRUtil = {
 
     PATTERN_POSITION_TABLE: [
         [],