fix: export error message from the UPNG lib

circle.yml

@@ -27,9 +27,6 @@ jobs:
       - run:
           name: upload coverage
           command: bash <(curl -s https://codecov.io/bash)
-      - run:
-          name: build
-          command: npm run build
       - run:
           name: release
           command: npm run semantic-release || true

example/index.ts

@@ -1,43 +1,47 @@
-import qrcodeParser from "../src";
+import qrcodeParser from '../src'
 
-const fileElement = document.getElementById("file");
+const fileElement = document.getElementById('file')
 fileElement.addEventListener(
-  "change",
+  'change',
   (e) => {
-    let files: FileList = <FileList>(<HTMLInputElement>e.target).files;
-    qrcodeParser(files[0]).then((res) => {
-      console.log(res);
-      document.getElementById("content3").innerText = res;
-    });
+    const files: FileList = <FileList>(<HTMLInputElement>e.target).files
+    qrcodeParser(files[0])
+      .then((res) => {
+        document.getElementById('content3').innerText = res
+      })
+      .catch((err) => {
+        // eslint-disable-next-line no-console
+        console.log('error', err)
+      })
   },
-  false
-);
+  false,
+)
 
-document.getElementById("parse-image-url").addEventListener(
-  "click",
+document.getElementById('parse-image-url').addEventListener(
+  'click',
   () => {
-    const url = (<HTMLInputElement>document.getElementById("image-url")).value;
+    const url = (<HTMLInputElement>document.getElementById('image-url')).value
 
-    if (!url) return;
+    if (!url) return
 
     qrcodeParser(url).then((res) => {
-      document.getElementById("content1").innerText = res;
-    });
+      document.getElementById('content1').innerText = res
+    })
   },
-  false
-);
+  false,
+)
 
-document.getElementById("parse-image-base64").addEventListener(
-  "click",
+document.getElementById('parse-image-base64').addEventListener(
+  'click',
   () => {
-    const url = (<HTMLInputElement>document.getElementById("image-base64"))
-      .value;
+    const url = (<HTMLInputElement>document.getElementById('image-base64'))
+      .value
 
-    if (!url) return;
+    if (!url) return
 
     qrcodeParser(url).then((res) => {
-      document.getElementById("content2").innerText = res;
-    });
+      document.getElementById('content2').innerText = res
+    })
   },
-  false
-);
+  false,
+)

package.json

@@ -19,7 +19,7 @@
     "prepublishOnly": "npm run build",
     "test:cov": "jest --coverage",
     "test": "jest",
-    "lint": "eslint \"{src,test}/**/*.ts\"",
+    "lint": "eslint \"{src,test,example}/**/*.ts\"",
     "example": "vite",
     "build:example": "vite build",
     "build": "microbundle && npm run build:umd",

src/utils.ts

@@ -7,13 +7,22 @@ export const blob2text = async(blob: Blob): Promise<string> => {
     myReader.readAsArrayBuffer(blob)
     myReader.addEventListener('loadend', () => {
       const buffer = myReader.result
-      const img = UPNG.decode(buffer as ArrayBuffer)
-      const rgba = UPNG.toRGBA8(img)[0]
-      const code = jsQR(new Uint8ClampedArray(rgba), img.width, img.height)
-      if (code !== null)
-        resolve(code.data)
-      else
-        reject(new Error('decode failed'))
+      try {
+        const img = UPNG.decode(buffer as ArrayBuffer)
+        const rgba = UPNG.toRGBA8(img)[0]
+        const code = jsQR(new Uint8ClampedArray(rgba), img.width, img.height)
+        if (code !== null)
+          return resolve(code.data)
+        else
+          return reject(new Error('decode failed'))
+      }
+      catch (err) {
+        if (typeof err === 'string')
+          return reject(new Error(err))
+
+        if (err instanceof Error)
+          return reject(new Error(err.message))
+      }
     })
   })
 }
@@ -29,12 +38,10 @@ export const isBase64 = (str: string): boolean => {
 
 // Copy from https://github.com/sindresorhus/is-url-superb
 export const isUrl = (string: string): boolean => {
-  if (typeof string !== 'string')
-    throw new TypeError('Expected a string')
+  if (typeof string !== 'string') throw new TypeError('Expected a string')
 
   string = string.trim()
-  if (string.includes(' '))
-    return false
+  if (string.includes(' ')) return false
 
   try {
     new URL(string) // eslint-disable-line no-new