uniapp Back to the previous page

If there is a page that can be returned, it will return directly. uni.navigateBack will automatically refresh the page after failing to return by default, and cannot continue to return

goback() {
    
    
			// #ifdef H5
			let canBack = true;
			const pages = getCurrentPages();
			// 有可返回的页面则直接返回，uni.navigateBack默认返回失败之后会自动刷新页面 				，无法继续返回
			if (pages.length > 1) {
    
    
				uni.navigateBack(1);
				return;
			}
			// vue router 可以返回uni.navigateBack失败的页面 但是会重新加载
			let a = this.$router.go(-1);
			// router.go失败之后则重定向到首页
			if (a == undefined) {
    
    
				uni.reLaunch({
    
    
					url: '/pages/tabbar/index'
				});
			}
			return;
			// #endif
			uni.navigateBack(1);
		}

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