报错js中JSON乱码问题吗？跟着视频敲得该如何解决呢？

                function() {
                    let shop = {};
                    shop.shopName = $('#shop-name').val();
                    shop.shopAddr = $('#shop-addr').val();
                    shop.phone = $('#shop-phone').val();
                    shop.shopDesc = $('#shop-desc').val();
                    shop.shopCategory = {
                        shopCategoryId : $('#shop-category').find('option')
                                .not(function() {
                                    return !this.selected;
                                }).data('id')
                    }
                    shop.area = {
                        areaId : $('#area-category').find('option').not(function() {
                            return !this.selected;
                        }).data('id')
                    }
                    let shopImg = $("#shop-img")[0].files[0];
                    let formData = new FormData();
                    formData.append('shopImg', shopImg);
                    formData.append('shopStr', JSON.stringify(shop));
                    let verifyCodeActual=$("#j_captcha").val();
                    if(!verifyCodeActual){
                        $.toast('请输入验证码！');
                        return;
                    }
                    formData.append('verifyCodeActual', verifyCodeActual);
                    $.ajax({
                        url : registerShopUrl,
                        type : 'POST',
                        data : formData,
                        content : false,
                        processData : false,
                        cache : false,
                        success : function(data) {
                            if (data.success) {
                                $.toast('提交成功！');
                            } else {
                                $.toast('提交失败！' + data.errMsg);
                            }
                            $('#captcha_img').click();
                        }
![图片说明](https://img-ask.csdn.net/upload/201904/11/1554912188_631267.png)

                    })
                });

                <!-- 缩略图 上传控件 -->
                        <li>
                            <div class="item-content">
                                <div class="item-inner">
                                    <div class="item-title label">缩略图</div>
                                    <div class="item-input">
                                        <input type="file" id="shop-img"></input>
                                    </div>
                                </div>
                            </div>
                        </li>![图片说明](https://img-ask.csdn.net/upload/201904/11/1554912149_214587.png)

ajax的 content :false改为 contentType:false 试试 ?