annotatorjs setup

//Our custom function to add uri into annotations
var pageUri = function () {
    return {
        beforeAnnotationCreated: function (ann) {
            ann.uri = window.location.href;
        }
    };
};
//Init Annotatorjs
var app = new annotator.App()

    //Include Annotatorjs UI
    .include(annotator.ui.main, {
        element: document.body
    })
    //storage Plugin 
    .include(annotator.storage.http, {
        prefix: "https://localhost:3000/api",
        //URLs to use in the Annotatorjs for crud opertations of API
        urls: {
            create: `/annotations/${window.btoa(file_name)}`,
            search: `/search/${window.btoa(file_name)}`
        }
    })
    .include(pageUri);
app.start()
    .then(function () {
        app.annotations.load({
            uri: window.location.href
        });
    });