4 files changed, 25 insertions, 36 deletions

diff --git a/webAO/utils/calculateApngLength.js b/webAO/utils/calculateApngLength.js
index d6a40b6..6b9aed2 100644
--- a/webAO/utils/calculateApngLength.js
+++ b/webAO/utils/calculateApngLength.js
@@ -1,7 +1,7 @@
 /**
-	 * Adds up the chunk delays to find out how long a APNG is
-	 * @param {data} apngFile the APNG data
-	 */
+   * Adds up the chunk delays to find out how long a APNG is
+   * @param {data} apngFile the APNG data
+   */
 const calculateApngLength = (apngFile) => {
   const d = new Uint8Array(apngFile);
   // https://wiki.mozilla.org/APNG_Specification#.60fcTL.60:_The_Frame_Control_Chunk
@@ -9,20 +9,20 @@ const calculateApngLength = (apngFile) => {
   for (let i = 0; i < d.length; i++) {
     // Find fcTL header (66 63 54 4C)
     if (d[i] === 0x66
-					&& d[i + 1] === 0x63
-					&& d[i + 2] === 0x54
-					&& d[i + 3] === 0x4C) {
+          && d[i + 1] === 0x63
+          && d[i + 2] === 0x54
+          && d[i + 3] === 0x4C) {
       // numerator and denominator
-      const delay_num = Number(d[i + 23]);
-      const delay_den = Number(d[i + 25]);
+      const delayNum = Number(d[i + 23]);
+      const delayDen = Number(d[i + 25]);
       let delay;
       // minimum is 100ms
-      if (delay_den == 0)
-        delay = delay_num / 100;
+      if (delayDen === 0)
+        delay = delayNum / 100;
       else
-        delay = delay_num / delay_den;
+        delay = delayNum / delayDen;
 
-      duration = duration + delay;
+      duration += delay;
     }
   }
   return duration * 10;
diff --git a/webAO/utils/calculateGifLength.js b/webAO/utils/calculateGifLength.js
index 1df0ba9..ca0e1e1 100644
--- a/webAO/utils/calculateGifLength.js
+++ b/webAO/utils/calculateGifLength.js
@@ -1,8 +1,8 @@
 /**
-	 * Adds up the frame delays to find out how long a GIF is
-	 * I totally didn't steal this
-	 * @param {data} gifFile the GIF data
-	 */
+   * Adds up the frame delays to find out how long a GIF is
+   * I totally didn't steal this
+   * @param {data} gifFile the GIF data
+   */
 const calculateGifLength = (gifFile) => {
   const d = new Uint8Array(gifFile);
   // Thanks to http://justinsomnia.org/2006/10/gif-animation-duration-calculation/
@@ -11,9 +11,9 @@ const calculateGifLength = (gifFile) => {
   for (let i = 0; i < d.length; i++) {
     // Find a Graphic Control Extension hex(21F904__ ____ __00)
     if (d[i] === 0x21
-				&& d[i + 1] === 0xF9
-				&& d[i + 2] === 0x04
-				&& d[i + 7] === 0x00) {
+        && d[i + 1] === 0xF9
+        && d[i + 2] === 0x04
+        && d[i + 7] === 0x00) {
       // Swap 5th and 6th bytes to get the delay per frame
       const delay = (d[i + 5] << 8) | (d[i + 4] & 0xFF);
 
diff --git a/webAO/utils/fileExistsSync.js b/webAO/utils/fileExistsSync.js
deleted file mode 100644
index 1d7fde2..0000000
--- a/webAO/utils/fileExistsSync.js
+++ /dev/null
@@ -1,11 +0,0 @@
-const fileExistsSync = (url) => {
-  try {
-    const http = new XMLHttpRequest();
-    http.open('HEAD', url, false);
-    http.send();
-    return http.status != 404;
-  } catch (e) {
-    return false;
-  }
-};
-export default fileExistsSync;
diff --git a/webAO/utils/getAnimLength.js b/webAO/utils/getAnimLength.js
index aa303cf..f9d793f 100644
--- a/webAO/utils/getAnimLength.js
+++ b/webAO/utils/getAnimLength.js
@@ -1,11 +1,11 @@
 import calculatorHandler from './calculatorHandler';
-import fileExists from './fileExists.js';
-import { requestBuffer } from '../services/request.js';
+import fileExists from './fileExists';
+import { requestBuffer } from '../services/request';
 /**
-	 * Gets animation length. If the animation cannot be found, it will
-	 * silently fail and return 0 instead.
-	 * @param {string} filename the animation file name
-	 */
+   * Gets animation length. If the animation cannot be found, it will
+   * silently fail and return 0 instead.
+   * @param {string} filename the animation file name
+   */
 
 const getAnimLength = async (url) => {
   const extensions = ['.gif', '.webp', '.apng'];