use javascript standard style

browser-entry.js

@@ -15,42 +15,43 @@ var lastElement = null
 var lastView = null
 var lastLesson = null
 
-watch(state, function refreshView() {
+watch(state, function refreshView () {
+  var element = null
   if (state.view() === 'lesson') {
     if (lastLesson !== state.selectedLesson() || lastView !== 'lesson') {
       lastLesson = state.selectedLesson()
       var lesson = state.getLesson(state.selectedLesson())
       if (lesson) {
-        var element = LessonView(state, lesson)
+        element = LessonView(state, lesson)
         setView(element)
       } else {
         state.view.set('index')
       }
     }
   } else if (state.view() !== lastView) {
-    var element = IndexView(state)
+    element = IndexView(state)
     setView(element)
     scrollSelectedIntoView()
   }
   lastView = state.view()
 })
 
-function scrollSelectedIntoView() {
+function scrollSelectedIntoView () {
   var selected = document.querySelector('.-selected')
   if (selected) {
     if (selected.scrollIntoViewIfNeeded) {
-      selected.scrollIntoViewIfNeeded() 
+      selected.scrollIntoViewIfNeeded()
     } else if (selected.scrollIntoView) {
-      selected.scrollIntoView(false) 
+      selected.scrollIntoView(false)
     }
   }
 }
 
-function setView(element) {
+function setView (element) {
   if (lastElement) {
-    lastElement.destroy&&lastElement.destroy()
+    lastElement.destroy && lastElement.destroy()
     lastElement.remove()
   }
   document.body.appendChild(element)
   lastElement = element
-}
+}

lessons/1. Subtractive Synthesis/00. Browser make sound!/answer.js

@@ -1,4 +1,4 @@
-//# duration=2
+// # duration=2
 
 var audioContext = new AudioContext()
 

lessons/1. Subtractive Synthesis/01. Play a pitched sawtooth wave/answer.js

@@ -1,4 +1,4 @@
-//# duration=2
+// # duration=2
 
 var audioContext = new AudioContext()
 

lessons/1. Subtractive Synthesis/03. Play a short sequence of notes/answer.js

@@ -1,21 +1,21 @@
-//# duration=3
+// # duration=3
 
 var audioContext = new AudioContext()
 
 play(0, 3, 0.5)
 play(1, 10, 0.5)
 play(2, 15, 0.5)
 
-function play(delay, pitch, duration) {
+function play (delay, pitch, duration) {
   var startTime = audioContext.currentTime + delay
   var endTime = startTime + duration
-  
+
   var oscillator = audioContext.createOscillator()
   oscillator.connect(audioContext.destination)
 
   oscillator.type = 'sawtooth'
-  oscillator.detune.value = pitch * 100 
+  oscillator.detune.value = pitch * 100
 
   oscillator.start(startTime)
   oscillator.stop(endTime)
-}
+}

lessons/1. Subtractive Synthesis/03. Play a short sequence of notes/start.js

@@ -4,8 +4,8 @@ play(0, 3, 0.5)
 play(1, 10, 0.5)
 play(2, 15, 0.5)
 
-function play(delay, pitch, duration) {
+function play (delay, pitch, duration) {
   var startTime = audioContext.currentTime + delay
   var endTime = startTime + duration
 
-}
+}

lessons/1. Subtractive Synthesis/04. Add a high-pass filter/answer.js

@@ -1,4 +1,4 @@
-//# duration=3
+// # duration=3
 
 var audioContext = new AudioContext()
 
@@ -11,16 +11,16 @@ play(0, 3, 0.5)
 play(1, 10, 0.5)
 play(2, 15, 0.5)
 
-function play(delay, pitch, duration) {
+function play (delay, pitch, duration) {
   var startTime = audioContext.currentTime + delay
   var endTime = startTime + duration
-  
+
   var oscillator = audioContext.createOscillator()
   oscillator.connect(filter)
 
   oscillator.type = 'sawtooth'
-  oscillator.detune.value = pitch * 100 
+  oscillator.detune.value = pitch * 100
 
   oscillator.start(startTime)
   oscillator.stop(endTime)
-}
+}

lessons/1. Subtractive Synthesis/04. Add a high-pass filter/start.js

@@ -4,16 +4,16 @@ play(0, 3, 0.5)
 play(1, 10, 0.5)
 play(2, 15, 0.5)
 
-function play(delay, pitch, duration) {
+function play (delay, pitch, duration) {
   var startTime = audioContext.currentTime + delay
   var endTime = startTime + duration
 
   var oscillator = audioContext.createOscillator()
   oscillator.connect(audioContext.destination)
 
   oscillator.type = 'sawtooth'
-  oscillator.detune.value = pitch * 100 
+  oscillator.detune.value = pitch * 100
 
   oscillator.start(startTime)
   oscillator.stop(endTime)
-}
+}

lessons/1. Subtractive Synthesis/05. Modulate filter cutoff/answer.js

@@ -1,12 +1,12 @@
-//# duration=3
+// # duration=3
 
 var audioContext = new AudioContext()
 
 play(0, 3, 0.5)
 play(1, 10, 0.5)
 play(2, 15, 0.5)
 
-function play(delay, pitch, duration) {
+function play (delay, pitch, duration) {
   var startTime = audioContext.currentTime + delay
   var endTime = startTime + duration
 
@@ -22,8 +22,8 @@ function play(delay, pitch, duration) {
   oscillator.connect(filter)
 
   oscillator.type = 'sawtooth'
-  oscillator.detune.value = pitch * 100 
+  oscillator.detune.value = pitch * 100
 
   oscillator.start(startTime)
   oscillator.stop(endTime)
-}
+}

lessons/1. Subtractive Synthesis/05. Modulate filter cutoff/start.js

@@ -4,7 +4,7 @@ play(0, 3, 0.5)
 play(1, 10, 0.5)
 play(2, 15, 0.5)
 
-function play(delay, pitch, duration) {
+function play (delay, pitch, duration) {
   var startTime = audioContext.currentTime + delay
   var endTime = startTime + duration
 
@@ -17,8 +17,8 @@ function play(delay, pitch, duration) {
   oscillator.connect(filter)
 
   oscillator.type = 'sawtooth'
-  oscillator.detune.value = pitch * 100 
+  oscillator.detune.value = pitch * 100
 
   oscillator.start(startTime)
   oscillator.stop(endTime)
-}
+}

lessons/1. Subtractive Synthesis/06. Add an envelope/answer.js

@@ -1,12 +1,12 @@
-//# duration=4.5
+// # duration=4.5
 
 var audioContext = new AudioContext()
 
 play(0, 3, 0.5)
 play(1, 10, 0.5)
 play(2, 15, 0.5)
 
-function play(delay, pitch, duration) {
+function play (delay, pitch, duration) {
   var startTime = audioContext.currentTime + delay
   var endTime = startTime + duration
 
@@ -20,8 +20,8 @@ function play(delay, pitch, duration) {
   oscillator.connect(envelope)
 
   oscillator.type = 'sawtooth'
-  oscillator.detune.value = pitch * 100 
+  oscillator.detune.value = pitch * 100
 
   oscillator.start(startTime)
   oscillator.stop(endTime + 2)
-}
+}

lessons/1. Subtractive Synthesis/06. Add an envelope/start.js

@@ -4,16 +4,16 @@ play(0, 3, 0.5)
 play(1, 10, 0.5)
 play(2, 15, 0.5)
 
-function play(delay, pitch, duration) {
+function play (delay, pitch, duration) {
   var startTime = audioContext.currentTime + delay
   var endTime = startTime + duration
-    
+
   var oscillator = audioContext.createOscillator()
   oscillator.connect(audioContext.destination)
 
   oscillator.type = 'sawtooth'
-  oscillator.detune.value = pitch * 100 
+  oscillator.detune.value = pitch * 100
 
   oscillator.start(startTime)
   oscillator.stop(endTime)
-}
+}

lessons/1. Subtractive Synthesis/07. Vibrato/answer.js

@@ -1,12 +1,12 @@
-//# duration=4
+// # duration=4
 
 var audioContext = new AudioContext()
 
 play(0, 3, 0.5)
 play(1, 10, 0.5)
 play(2, 15, 0.5)
 
-function play(delay, pitch, duration) {
+function play (delay, pitch, duration) {
   var startTime = audioContext.currentTime + delay
   var endTime = startTime + duration
 
@@ -20,7 +20,7 @@ function play(delay, pitch, duration) {
   oscillator.connect(envelope)
 
   oscillator.type = 'sawtooth'
-  oscillator.detune.value = pitch * 100 
+  oscillator.detune.value = pitch * 100
 
   var vibrato = audioContext.createGain()
   vibrato.gain.value = 30
@@ -34,4 +34,4 @@ function play(delay, pitch, duration) {
   oscillator.start(startTime)
   oscillator.stop(endTime + 2)
 
-}
+}

lessons/1. Subtractive Synthesis/07. Vibrato/start.js

@@ -4,7 +4,7 @@ play(0, 3, 0.5)
 play(1, 10, 0.5)
 play(2, 15, 0.5)
 
-function play(delay, pitch, duration) {
+function play (delay, pitch, duration) {
   var startTime = audioContext.currentTime + delay
   var endTime = startTime + duration
 
@@ -18,8 +18,8 @@ function play(delay, pitch, duration) {
   oscillator.connect(envelope)
 
   oscillator.type = 'sawtooth'
-  oscillator.detune.value = pitch * 100 
+  oscillator.detune.value = pitch * 100
 
   oscillator.start(startTime)
   oscillator.stop(endTime + 2)
-}
+}

lessons/2. Working With Samples/08. Decode and play an audio file/answer.js

@@ -1,22 +1,22 @@
-//# duration=8.4
+// # duration=8.4
 
 var audioContext = new AudioContext()
 
 // wait 100ms for sample to download/decode
 var startTime = audioContext.currentTime + 0.2
 
-getSample('zara1.ogg', function play(buffer) {
+getSample('zara1.ogg', function play (buffer) {
   var player = audioContext.createBufferSource()
   player.buffer = buffer
   player.connect(audioContext.destination)
   player.start(startTime)
 })
-  
-function getSample(url, cb) {
+
+function getSample (url, cb) {
   var request = new XMLHttpRequest()
   request.open('GET', url)
   request.responseType = 'arraybuffer'
-  request.onload = function() {
+  request.onload = function () {
     audioContext.decodeAudioData(request.response, cb)
   }
   request.send()

lessons/2. Working With Samples/08. Decode and play an audio file/start.js

@@ -3,15 +3,13 @@ var audioContext = new AudioContext()
 // wait 100ms for sample to download/decode
 var startTime = audioContext.currentTime + 0.2
 
-getSample('zara1.ogg', function play(buffer) {
+getSample('zara1.ogg', function play (buffer) {})
 
-})
-
-function getSample(url, cb) {
+function getSample (url, cb) {
   var request = new XMLHttpRequest()
   request.open('GET', url)
   request.responseType = 'arraybuffer'
-  request.onload = function() {
+  request.onload = function () {
     audioContext.decodeAudioData(request.response, cb)
   }
   request.send()

lessons/2. Working With Samples/09. Set in and out points/answer.js

@@ -1,20 +1,20 @@
-//# duration=2.2
+// # duration=2.2
 
 var audioContext = new AudioContext()
 var startTime = audioContext.currentTime + 0.2
 
-getSample('zara1.ogg', function play(buffer) {
+getSample('zara1.ogg', function play (buffer) {
   var player = audioContext.createBufferSource()
   player.buffer = buffer
   player.connect(audioContext.destination)
   player.start(startTime, 2.5, 2)
 })
-  
-function getSample(url, cb) {
+
+function getSample (url, cb) {
   var request = new XMLHttpRequest()
   request.open('GET', url)
   request.responseType = 'arraybuffer'
-  request.onload = function() {
+  request.onload = function () {
     audioContext.decodeAudioData(request.response, cb)
   }
   request.send()

lessons/2. Working With Samples/09. Set in and out points/start.js

@@ -1,18 +1,18 @@
 var audioContext = new AudioContext()
 var startTime = audioContext.currentTime + 0.2
 
-getSample('zara1.ogg', function play(buffer) {
+getSample('zara1.ogg', function play (buffer) {
   var player = audioContext.createBufferSource()
   player.buffer = buffer
   player.connect(audioContext.destination)
   player.start(startTime)
 })
-  
-function getSample(url, cb) {
+
+function getSample (url, cb) {
   var request = new XMLHttpRequest()
   request.open('GET', url)
   request.responseType = 'arraybuffer'
-  request.onload = function() {
+  request.onload = function () {
     audioContext.decodeAudioData(request.response, cb)
   }
   request.send()