Web API for Create, Update, Delete record

 1. Create Web API Request : 

Syntax: 

Xrm.WebApi.createRecord(entityLogicalName, data).then(successCallback, errorCallback);

//json object
var entity = {};
entity.address1_country = "India";
entity["areaid@odata.bind"] = "/areas(0b4ecbb5-e574-eb11-a812-0022481a9090)"; //lookup field

Xrm.WebApi.online.createRecord("account", entity).then(
    function success(result) {
        var newEntityId = result.id;
    },
    function(error) {
        Xrm.Utility.alertDialog(error.message);
    }
);

2. Update Web API Request : 

syntax : 

Xrm.WebApi.updateRecord(entityLogicalName, id, data).then(successCallback, errorCallback);

//json object
var entity = {};
entity["areaid@odata.bind"] = "/areas(0b4ecbb5-e574-eb11-a812-0022481a9090)"; //lookup field
entity.address2_country = "India";

Xrm.WebApi.online.updateRecord("account", "0b4ebjb5-e574-eb11-a812-0022481a9090", entity).then(
    function success(result) {
        var updatedEntityId = result.id;
    },
    function(error) {
        Xrm.Utility.alertDialog(error.message);
    }
);

3. Delete Web API Request : 

Syntax : 

Xrm.WebApi.deleteRecord(entityLogicalName, id).then(successCallback, errorCallback);

Xrm.WebApi.online.deleteRecord("account", "0b4ecbb5-e574-eb11-a812-0022481a9090").then(
    function success(result) {
        //Success - No Return Data - Do Something
    },
    function(error) {
        Xrm.Utility.alertDialog(error.message);
    }
);