How to Get the Major Version of the File in SharePoint Online Using REST API

<%-- The markup and script in the following Content element will be placed in the <head>of the page --%>
<asp:content contentplaceholderid="PlaceHolderAdditionalPageHead" runat="server">
<script type="text/javascript" src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.9.1.min.js"></script>
<script type="text/javascript" src="/_layouts/15/sp.runtime.js"></script>
<script type="text/javascript" src="/_layouts/15/sp.js"></script>
<!-- Add your CSS styles to the following file -->
<link rel="Stylesheet" type="text/css" href="../Content/App.css" />
<!-- Add your JavaScript to the following file -->
<script type="text/javascript" src="../Scripts/App.js"></script>
</asp:content>
<%-- The markup in the following Content element will be placed in the TitleArea of the page --%>
<asp:content contentplaceholderid="PlaceHolderPageTitleInTitleArea" runat="server">Page Title</asp:content>
<%-- The markup and script in the following Content element will be placed in the <body>of the page --%>
<asp:content contentplaceholderid="PlaceHolderPageTitleInTitleArea" runat="server">REST API Examples</asp:content>
<%-- The markup and script in the following Content element will be placed in the <body>of the page --%>
<asp:content contentplaceholderid="PlaceHolderMain" runat="server">
<div>
<p>
<b>Major Version</b>
<br />
<input type="text" value="File Name Here" id="getfilename" />
<button id="getmajorversionbutton">Major Version</button>
</p>
</div>
</asp:content>

App.js

Replace the contents of App.js with the following:

  'use strict';
    var hostweburl;
    var appweburl;
    // Load the required SharePoint libraries.
    $(document).ready(function () {
        //Get the URI decoded URLs.
        hostweburl = decodeURIComponent(
getQueryStringParameter("SPHostUrl"));
        appweburl = decodeURIComponent(
getQueryStringParameter("SPAppWebUrl"));
        //Assign events to buttons
        $("#getmajorversionbutton").click(function (event) {
            getMajorVersion();
            event.preventDefault();
        });
        // Resources are in URLs in the form:
        // web_url/_layouts/15/resource
        var scriptbase = hostweburl + "/_layouts/15/";
        // Load the js file and continue to load the page.
        // SP.RequestExecutor.js to make cross-domain requests
        $.getScript(scriptbase + "SP.RequestExecutor.js");
    });
    // Utilities
    // Retrieve a query string value.
    // For production purposes you may want to use a library to handle the query string.
    function getQueryStringParameter(paramToRetrieve) {
        var params = document.URL.split("?")[1].split("&");
        for (var i = 0; i < params.length; i = i + 1) {
            var singleParam = params[i].split("=");
            if (singleParam[0] == paramToRetrieve) return singleParam[1];
        }
    }
    // Get the major version of the file
    function getMajorVersion() {
        var getfilename = document.getElementById("getfilename").value;
        var executor;
        // Initialize the RequestExecutor with the app web URL.
        executor = new SP.RequestExecutor(appweburl);
        executor.executeAsync({
            url: appweburl + "/_api/SP.AppContextSite(@target)/web/getfolderbyserverrelativeurl('/Shared%20Documents/FolderA')/files('" + getfilename + "')/MajorVersion?@target='" + hostweburl + "'",
            method: "GET",
            headers: {
                "Accept": "application/json; odata=verbose"
            },
            success: getMajorVersionSuccessHandler,
            error: getMajorVersionErrorHandler
        });
    }
    // Success Handler
    function getMajorVersionSuccessHandler(data) {
        var jsonObject = JSON.parse(data.body);
        // Display the major version of the file
        alert("Major version: " + jsonObject.d.MajorVersion);
    }
    // Error Handler
    function getMajorVersionErrorHandler(data, errorCode, errorMessage) {
        alert("Could not get the file major version: " + errorMessage);
    }

Deploy the App

1. Click on Run Project.
   
   
   
2. The app will be packaged, deployed and launched.
   
   
   
   
   
3. Click on "Click here to launch your app in a new window".
   
   
   
4. Click on Trust it.
   
   
   
5. Enter the file name and then click on the Major Version button.
6. The major version of the file is displayed.
   
   

Summary

Thus in this article you saw how to get the major version of the file using the REST API in SharePoint 2013 Online.