From f1a6fd81eb5961470d9936197bc6b51b71dfa939 Mon Sep 17 00:00:00 2001
From: Xmader <xmader@outlook.com>
Date: Sat, 7 Nov 2020 20:53:31 -0500
Subject: [PATCH] refactor: remove unused anti-detection code

---
 src/anti-detection.ts | 32 --------------------------------
 src/btn.ts            | 13 -------------
 2 files changed, 45 deletions(-)

diff --git a/src/anti-detection.ts b/src/anti-detection.ts
index aeed983..134920e 100644
--- a/src/anti-detection.ts
+++ b/src/anti-detection.ts
@@ -47,35 +47,3 @@ export function hookNative<T extends object, M extends (keyof T)> (
     })
   }
 }
-
-export const hideFromArrFilter = (() => {
-  const l = new Set()
-
-  const qsaHook = (_fn) => {
-    return function (...args) {
-      const nodes = _fn.apply(this, args)
-      const results = Array.prototype.filter.call(nodes, (e) => !l.has(e))
-
-      results.forEach((e) => {
-        Object.defineProperty(e, 'querySelectorAll', {
-          value: qsaHook,
-        })
-      })
-
-      // convert back to a NodeList/HTMLCollection instead of an Array
-      Object.setPrototypeOf(results, Object.getPrototypeOf(nodes))
-
-      // eslint-disable-next-line @typescript-eslint/no-unsafe-return
-      return results
-    }
-  }
-  hookNative(Element.prototype, 'querySelectorAll', qsaHook)
-  hookNative(document, 'querySelectorAll', qsaHook)
-
-  hookNative(Element.prototype, 'getElementsByClassName', qsaHook)
-  hookNative(document, 'getElementsByClassName', qsaHook)
-
-  return (item: any) => {
-    l.add(item)
-  }
-})()
diff --git a/src/btn.ts b/src/btn.ts
index b3464ca..717c7f7 100644
--- a/src/btn.ts
+++ b/src/btn.ts
@@ -1,6 +1,5 @@
 
 import { loadMscore, WebMscore } from './mscore'
-import { hideFromArrFilter } from './anti-detection'
 import i18n from './i18n'
 
 type BtnElement = HTMLButtonElement
@@ -42,11 +41,6 @@ export class BtnList {
   constructor (private templateBtn: BtnElement) { }
 
   private antiDetectionText = 'Download'
-  private firstBtn = true
-
-  private hide (el: HTMLElement) {
-    hideFromArrFilter(el)
-  }
 
   add (options: BtnOptions): BtnElement {
     const btn = this.templateBtn.cloneNode(true) as HTMLButtonElement
@@ -71,13 +65,6 @@ export class BtnList {
         },
       })
     })
-    // hide this button from Array.prototype.filter
-    if (this.firstBtn) {
-      this.firstBtn = false
-    } else {
-      this.hide(btn)
-      this.hide(textNode)
-    }
 
     const setText = (str: string): void => {
       textNode.textContent = str