let addEditStr = ‘‘
// 调用完ajax请求之后 即可用addEditStr
function selectContent($element) {
        $.ajax({
        url: "请求路径",
        data: JSON.stringify({ ‘list‘: { ‘key‘: ‘value‘ } }),
        type: "post",
        dataType: ‘json‘,
        async: false, // 同步
        contentType: "application/json",
        success: function (resultdata) {
            if (resultdata.code == 0) {
                // 请求成功之后对addEditStr进行处理
                return addEditStr = resultdata
            } else {
                errorShow(res);
            }
        },
        error: function () {
            console.info(‘请求错误‘)
        }
        })
}