foreach如何跳出循环

break；continue不生效，

使用

                    try {
                        l.forEach((v, i, a) => {
                            if (a[i].is_myself == 1) {
                                that.leftIndex = i
                                throw new Error('err')
                            }
                        })
                    } catch (e) {
                        return;
                    }