Example: how to execute SharePoint REST Batch request

SPBatchRequest.js

var jsonSPHeaders = {  
    "Accept": "application/json;odata=verbose", 
    "Content-Type": "application/json;odata=verbose",
    "DataServiceVersion": "3.0" 
};

OData.request( {
    requestUri: _spPageContextInfo.webAbsoluteUrl + "/_api/$batch",
    method: "POST",
    headers: { "X-RequestDigest": $("#__REQUESTDIGEST").val(),
               "DataServiceVersion": "3.0" },
    data: { __batchRequests: [
       { requestUri: _spPageContextInfo.webAbsoluteUrl + "/_api/web/lists/getbytitle('Pages')/items", method: "GET" , headers: jsonSPHeaders },
       { requestUri: _spPageContextInfo.webAbsoluteUrl + "/_api/web/lists/getbytitle('Tasks')/items", method: "GET", headers: jsonSPHeaders }
    ]}
},
function (data, response) {
    console.log('Pages list:');
    printListItems(data.__batchResponses[0].data);
    console.log('Tasks list:');
    printListItems(data.__batchResponses[1].data);
}, 
null, 
OData.batchHandler);



function printListItems(data){
   data.results.forEach(function(item){
       console.log(item.Title); 
   });
}

Thank you for this

Can you please share snippets for master and child data insertion.