Property 'plugins' does not exist on type 'Window'

[Lyfei]

code:

// @ts-ignore
window.plugins.streamingMedia.playVideo(targetUrl);

build error:

> ionic-app-scripts build
[13:43:12]  ionic-app-scripts 3.2.4 
[13:43:12]  build dev started ... 
[13:43:12]  clean started ... 
[13:43:12]  clean finished in 37 ms 
[13:43:12]  copy started ... 
[13:43:12]  deeplinks started ... 
[13:43:13]  deeplinks finished in 643 ms 
[13:43:13]  transpile started ... 
[13:43:17]  typescript: src/pages/training-list/training-list.ts, line: 153 
            Property 'plugins' does not exist on type 'Window'. 

     L152:  // @ts-ignore
     L153:  window.plugins.streamingMedia.playVideo(targetUrl);

env:

Ionic:

   Ionic CLI          : 6.20.9 (/usr/local/lib/node_modules/@ionic/cli)
   Ionic Framework    : ionic-angular 3.9.2
   @ionic/app-scripts : 3.2.4

Cordova:

   Cordova CLI       : 11.0.0 (cordova-lib@11.1.0)
   Cordova Platforms : android 6.4.0, browser 5.0.4, ios 5.1.1
   Cordova Plugins   : cordova-plugin-ionic-webview 5.0.0, (and 21 other plugins)