feat: cache check IOS result

Author: Donaldcwl

lib/utils.js

@@ -186,8 +186,11 @@ export function drawImageInCanvas(img) {
  * see: https://stackoverflow.com/a/9039885
  * @returns {boolean} isIOS device
  */
-function isIOS() {
-  return [
+export function isIOS() {
+  if (isIOS.cachedResult !== undefined) {
+    return isIOS.cachedResult;
+  }
+  isIOS.cachedResult = [
     'iPad Simulator',
     'iPhone Simulator',
     'iPod Simulator',
@@ -197,6 +200,7 @@ function isIOS() {
   ].includes(navigator.platform)
   // iPad on iOS 13 detection
   || (navigator.userAgent.includes('Mac') && 'ontouchend' in document);
+  return isIOS.cachedResult;
 }
 
 /**
@@ -213,6 +217,9 @@ export async function drawFileInCanvas(file) {
     }
     img = await createImageBitmap(file);
   } catch (e) {
+    if (process.env.BUILD === 'development') {
+      console.error(e);
+    }
     const dataUrl = await getDataUrlFromFile(file);
     img = await loadImage(dataUrl);
   }