refactor: replace deprecated String.prototype.substr() (#2282)

.substr() is deprecated so we replace it with .slice() which works similarily but isn't deprecated

Signed-off-by: Tobias Speicher <rootcommander@gmail.com>

2 files changed, 3 insertions, 3 deletions

diff --git a/index.js b/index.js
index 26bf323..31c318b 100644
--- a/index.js
+++ b/index.js
@@ -214,7 +214,7 @@ class WebTorrent extends EventEmitter {
           }
           port.postMessage(chunk)
           if (!chunk) cleanup()
-          if (!this.workerKeepAliveInterval) this.workerKeepAliveInterval = setInterval(() => fetch(`${this.serviceWorker.scriptURL.substr(0, this.serviceWorker.scriptURL.lastIndexOf('/') + 1).slice(window.location.origin.length)}webtorrent/keepalive/`), keepAliveTime)
+          if (!this.workerKeepAliveInterval) this.workerKeepAliveInterval = setInterval(() => fetch(`${this.serviceWorker.scriptURL.slice(0, this.serviceWorker.scriptURL.lastIndexOf('/') + 1).slice(window.location.origin.length)}webtorrent/keepalive/`), keepAliveTime)
         } else {
           cleanup()
         }
diff --git a/lib/file.js b/lib/file.js
index cbbc484..c5e5f1e 100644
--- a/lib/file.js
+++ b/lib/file.js
@@ -206,7 +206,7 @@ class File extends EventEmitter {
     if (typeof window === 'undefined') throw new Error('browser-only method')
     if (!this._serviceWorker) throw new Error('No worker registered')
     if (this._serviceWorker.state !== 'activated') throw new Error('Worker isn\'t activated')
-    const workerPath = this._serviceWorker.scriptURL.substr(0, this._serviceWorker.scriptURL.lastIndexOf('/') + 1).slice(window.location.origin.length)
+    const workerPath = this._serviceWorker.scriptURL.slice(0, this._serviceWorker.scriptURL.lastIndexOf('/') + 1).slice(window.location.origin.length)
     const url = `${workerPath}webtorrent/${this._torrent.infoHash}/${encodeURI(this.path)}`
     cb(null, url)
   }
@@ -215,7 +215,7 @@ class File extends EventEmitter {
     if (typeof window === 'undefined') throw new Error('browser-only method')
     if (!this._serviceWorker) throw new Error('No worker registered')
     if (this._serviceWorker.state !== 'activated') throw new Error('Worker isn\'t activated')
-    const workerPath = this._serviceWorker.scriptURL.substr(0, this._serviceWorker.scriptURL.lastIndexOf('/') + 1).slice(window.location.origin.length)
+    const workerPath = this._serviceWorker.scriptURL.slice(0, this._serviceWorker.scriptURL.lastIndexOf('/') + 1).slice(window.location.origin.length)
     elem.src = `${workerPath}webtorrent/${this._torrent.infoHash}/${encodeURI(this.path)}`
     cb(null, elem)
   }