document.html

<div id="angular-demo" class="content" role="main">
    <div *ngIf="showLoading" class="loader">
        <img src="../assets/loader.svg" />
    </div>
    <h1>Get detailed information of the document</h1>
    <div style="width: 50%; float: left">
        <form id="document-sent" [formGroup]="userForm" (ngSubmit)="onSubmit()">
            <div class="label-details">
                <label for="documentId"> Enter Document Id here </label>
                <input id="documentId" type="text" formControlName="documentId" placeholder="Enter your document id" />
            </div>
            <button class="button" type="submit">Get Document Properties</button>
        </form>
    </div>

    <div *ngIf="documentProperties" id="jsonContent">
        <ngx-json-viewer [json]="documentProperties" [expanded]="false"></ngx-json-viewer>
    </div>
</div>