SharePoint Get list items by CAML query - REST API

 Below is the javascript code for getting list items by CAML Query.

function executeJson(url, method, headers, payload) {

    method = method || 'GET';

    headers = headers || {};

    headers["Accept"] = "application/json;odata=verbose";

    if (method == "POST") {

        headers["X-RequestDigest"] = $("#__REQUESTDIGEST").val();

    }

    var ajaxOptions = {

        url: url,

        type: method,

        contentType: "application/json;odata=verbose",

        headers: headers

    };

    if (typeof payload != 'undefined') {

        ajaxOptions.data = JSON.stringify(payload);

    }

    return $.ajax(ajaxOptions);

}

function getListItemsByCAML(webUrl, listTitle, queryText) {

    var viewXml = '<View><Query>' + queryText + '</Query></View>';

    var url = webUrl + "/_api/web/lists/getbytitle('" + listTitle + "')/getitems";

    var queryPayload = {

        'query': {

            '__metadata': {

                'type': 'SP.CamlQuery'

            },

            'ViewXml': viewXml

        }

    };

    return executeJson(url, "POST", null, queryPayload);

}

//Construct the CAML query

var queryText = "<OrderBy><FieldRef Name=\"SortOrder\" /></OrderBy><Where></Where>";

getListItemsByCAML(_spPageContextInfo.webAbsoluteUrl, 'Master.LeftNavigation', queryText)

.done(function(data) {

    var items = data.d.results;

    storeWithExpiration.set('DPA_LeftNav', {

            site: _spPageContextInfo.webAbsoluteUrl,

            items: items

        },

        300000); //5 minutes

    setLefNav(items);

})

.fail(

    function(error) {

        console.log(JSON.stringify(error));

});