app.deeplink is the instance of DeepLink API, which provide functions to enable DeepLink to your app content.
NOTE : In order to enable Deep Link to your app, you have to do all the following configurations.
First Update Your Package.JSONIn order to enable Deep Link to your app, you’ll have to define array of objects with following attributes in package.json file of your app
deep-link attribute in package.json which is array of objects of scheme and hostYou can define as many scheme and host you want
scheme
    host
    {
  "deep-link":[
        {
            "scheme" : "http",
            "host" : "android-js.github.io"
        },
        {
            "scheme" : "https",
            "host" : "android-js.github.io"
        }
  ]
}
whenever user click on defined links or hosts, your app will be listed as suggestion to open that link in your app
app.deeplink.getLink()Returns a link on which user clicked to open that in your app
NOTE: returns link if available otherwise -1
An example of above code:
// In views of your app
let link = app.deeplink.getLink();
if(link != '-1') {
    app.loadURL(link);
}