From f6092343df715027072b7e3e4fe537632d4dfb54 Mon Sep 17 00:00:00 2001
From: Harrie van der Lubbe <harrie@mindd.eu>
Date: Sun, 22 Dec 2019 04:58:19 +0000
Subject: [PATCH] only add js (checked by hash) once - to prevent multiple
 listeners added through queued tasks adding more than once

---
 src/LaravelViewBinder.php | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/LaravelViewBinder.php b/src/LaravelViewBinder.php
index 6a2b5ec..4dc39b2 100644
--- a/src/LaravelViewBinder.php
+++ b/src/LaravelViewBinder.php
@@ -34,14 +34,23 @@ public function __construct(Dispatcher $event, $views)
 
     /**
      * Bind the given JavaScript to the view.
+     * Tracks if Javascript has already been added
+     * by keeping hashes of the js code to check against in the view data
      *
      * @param string $js
      */
     public function bind($js)
     {
         foreach ($this->views as $view) {
-            $this->event->listen("composing: {$view}", function () use ($js) {
-                echo "<script>{$js}</script>";
+            $this->event->listen("composing: {$view}", function ($view) use ($js) {
+                $data = $view->getData();
+                $hashes = isset($data['hashes']) ? $data['hashes'] : [];
+                $hash = md5($js);
+                if (!in_array($hash,$hashes)) {
+                    $hashes[] = md5($js);
+                    $view->with('hashes',$hashes);
+                    echo "<script>{$js}</script>";
+                }
             });
         }
     }