Improve progress logic

Return null instead of 0 when not ready, and prevent anything being reported

src/ReactPlayer.js

@@ -37,10 +37,10 @@ export default class ReactPlayer extends Component {
       let progress = {}
       const loaded = this.refs.player.getFractionLoaded()
       const played = this.refs.player.getFractionPlayed()
-      if (!this.prevLoaded || loaded !== this.prevLoaded) {
+      if (loaded !== null && loaded !== this.prevLoaded) {
         progress.loaded = this.prevLoaded = loaded
       }
-      if (!this.prevPlayed || played !== this.prevPlayed) {
+      if (played !== null && played !== this.prevPlayed) {
         progress.played = this.prevPlayed = played
       }
       if (progress.loaded || progress.played) {

src/players/FilePlayer.js

@@ -37,11 +37,11 @@ export default class FilePlayer extends Base {
     this.player.volume = fraction
   }
   getFractionPlayed () {
-    if (!this.isReady) return 0
+    if (!this.isReady) return null
     return this.player.currentTime / this.player.duration
   }
   getFractionLoaded () {
-    if (!this.isReady) return 0
+    if (!this.isReady) return null
     return this.player.buffered.end(0) / this.player.duration
   }
   render () {

src/players/SoundCloud.js

@@ -94,11 +94,11 @@ export default class SoundCloud extends Base {
     this.player.setVolume(fraction)
   }
   getFractionPlayed () {
-    if (!this.isReady) return 0
+    if (!this.isReady) return null
     return this.player.getCurrentPosition() / this.player.getDuration()
   }
   getFractionLoaded () {
-    if (!this.isReady) return 0
+    if (!this.isReady) return null
     return this.player.getLoadedPosition() / this.player.getDuration()
   }
   render () {

src/players/Vimeo.js

@@ -56,10 +56,10 @@ export default class Vimeo extends Base {
     this.postMessage('setVolume', fraction)
   }
   getFractionPlayed () {
-    return this.fractionPlayed || 0
+    return this.fractionPlayed || null
   }
   getFractionLoaded () {
-    return this.fractionLoaded || 0
+    return this.fractionLoaded || null
   }
   onMessage = e => {
     if (!MATCH_MESSAGE_ORIGIN.test(e.origin)) return

src/players/YouTube.js

@@ -97,11 +97,11 @@ export default class YouTube extends Base {
     this.player.setVolume(fraction * 100)
   }
   getFractionPlayed () {
-    if (!this.isReady) return 0
+    if (!this.isReady) return null
     return this.player.getCurrentTime() / this.player.getDuration()
   }
   getFractionLoaded () {
-    if (!this.isReady) return 0
+    if (!this.isReady) return null
     return this.player.getVideoLoadedFraction()
   }
   render () {