函数内部API调用的返回和错误处理

async function fetchData() {
    try {
        const response = await fetch('https://api.example.com/data');
        if (!response.ok) {
            throw new Error(`HTTP error! status: ${response.status}`);
        }
        const data = await response.json();
        return data;
    } catch (error) {
        console.error('Error fetching data:', error);
        throw error;
    }
}

// 调用示例
fetchData()
    .then(data => {
        console.log('Data fetched successfully:', data);
    })
    .catch(error => {
        console.error('Failed to fetch data:', error);
    });