Fix WebAudio stop error on early audio-button end

.changeset/audio-stop-bug.md

@@ -0,0 +1,5 @@
+---
+"@jspsych/plugin-audio-button-response": patch
+---
+
+Prevent WebAudio stop error when trials end early by removing ended listeners before stopping playback.

contributors.md

@@ -28,6 +28,7 @@ The following people have contributed to the development of jsPsych by writing c
 * Andy Heusser - https://github.com/andrewheusser
 * Angus Hughes - https://github.com/awhug
 * jade - https://github.com/jadeddelta
+* Stephen M. Jerge - https://github.com/stephenmjerge
 * Gustavo Juantorena - https://github.com/GEJ1
 * Chris Jungerius - https://github.com/cjungerius
 * George Kachergis - https://github.com/kachergis
@@ -72,4 +73,4 @@ The following people have contributed to the development of jsPsych by writing c
 * Shaobin Jiang - https://github.com/Shaobin-Jiang
 * Haotian Tu - https://github.com/thtTNT
 * Joshua Unrau - https://github.com/joshunrau
-* Victor Zhang - https://github.com/vzhang03
+* Victor Zhang - https://github.com/vzhang03

packages/plugin-audio-button-response/src/index.ts

@@ -291,13 +291,13 @@ class AudioButtonResponsePlugin implements JsPsychPlugin<Info> {
 
   // method to end trial when it is time
   private end_trial = () => {
-    // stop the audio file if it is playing
-    this.audio.stop();
-
     // remove end event listeners if they exist
     this.audio.removeEventListener("ended", this.end_trial);
     this.audio.removeEventListener("ended", this.enable_buttons);
 
+    // stop the audio file if it is playing
+    this.audio.stop();
+
     // gather the data to store for the trial
     var trial_data = {
       rt: this.response.rt,