paru，

建议您使用Ajax调用REST API通过设置参数["async":false]同步检索列表项.

您可以参考:

You can refer to: https://sharepoint.stackexchange.com/questions/208020/make-caml-query-with-in-rest-api-call

您的代码如下所示:

var viewXml = {
            ViewXml: "<View><Query><Where><Eq><FieldRef Name=\'Country\' /><Value Type=\'Choice\'>" + country + "</Value></Eq></Where></Query>" +
                     "<RowLimit>100</RowLimit></View>"
        }

        var call =

.ajax({url:_spPageContextInfo.webAbsoluteUrl +``/_api/Web/Lists/getByTitle('xyz')/GetItems(query = @ v1)?'' +"@ v1 =" + JSON.stringify(viewXml)， 类型:"POST"， dataType:"json"， 标头:{ 接受:"application/json; odata = verbose"， "X-RequestDigest":

.ajax({url: _spPageContextInfo.webAbsoluteUrl + "/_api/Web/Lists/getByTitle('xyz')/GetItems(query=@v1)?" +"@v1=" + JSON.stringify(viewXml), type: "POST", dataType: "json", headers: { Accept: "application/json;odata=verbose", "X-RequestDigest":

("#__ REQUESTDIGEST").val() }， 异步:假 });

("#__REQUESTDIGEST").val() }, async: false });

有关REST API的更多信息，供您参考. /span>

More information about REST API for your reference.

如果您想使用JSOM来解决问题，您可以参考下面的文章.

***的问候，

Lee Liu