js装饰器

/**
 * 接口try 装饰器
 * @param loading 是否有loading效果
 * @param cb 异常处理函数d 函数名
 * @constructor
 */
export function Try(loading?: boolean, cb?: string) {
    return function (target: object, key: string | symbol, descriptor: PropertyDescriptor) {
        const method = descriptor.value;
        descriptor.value = async function (...args) {
            try {
                if (loading) {
                    Tips.showLoading();
                }
                return await method.call(this, ...args);
            } catch (e) {
                if (cb && target[cb]) {
                    target[cb](e);
                } else {
                    Ehr.handleError(e);
                }
            } finally {
                if (loading) {
                    Tips.hideLoading();
                }
            }
        };
    };
}

/**
 * 节流装饰器
 * @param delay
 * @constructor
 */
export function Throttle(delay = 300) {
    let previous = 0;
    return function (target: object, key: string | symbol, descriptor: PropertyDescriptor) {
        const method = descriptor.value;
        descriptor.value = function (...args) {
            const now = Date.now();
            if (now - previous > delay) {
                previous = now;
                return method.call(this, ...args);
            }
        };
    };
}

/**
 * 防抖装饰器
 * @param delay
 * @constructor
 */
export const Debounce = (delay: number = 200) => {
    let timer: any = null;
    return function (target: object, propertyKey: string | symbol, descriptor: PropertyDescriptor) {
        const method = descriptor.value;
        descriptor.value = function (...args) {
            if (timer) {
                clearTimeout(timer);
            }
            timer = setTimeout(() => {
                return method.call(this, ...args);
            }, delay);
        };
    };
};

    @Debounce()
    @Try()
    async login() {
        if (this.isValid) return;
        await LoginService.login();
        await Service.becomeVip(this.userId);
        YNavigator.redirectTo("/shop/pages/shopIndex/ShopIndexPage");
    }