var xhr = new XMLHttpRequest();
xhr.open('GET', 'your-api-endpoint', true);
xhr.onload = function() {
    if (xhr.status >= 200 && xhr.status < 300) {
        var response = JSON.parse(xhr.responseText);
        console.log(response.key); // 获取特定键的值
    } else {
        console.error('Request failed with status: ' + xhr.status);
    }
};
xhr.onerror = function() {
    console.error('Request failed');
};
xhr.send();

fetch('your-api-endpoint')
    .then(response => {
        if (!response.ok) {
            throw new Error('Network response was not ok');
        }
        return response.json();
    })
    .then(data => {
        console.log(data.key); // 获取特定键的值
    })
    .catch(error => {
        console.error('There was a problem with the fetch operation:', error);
    });

$.ajax({
    url: 'your-api-endpoint',
    type: 'GET',
    dataType: 'json',
    success: function(data) {
        console.log(data.key); // 获取特定键的值
    },
    error: function(xhr, status, error) {
        console.error('Error:', error);
    }
});

axios.get('your-api-endpoint')
    .then(function(response) {
        console.log(response.data.key); // 获取特定键的值
    })
    .catch(function(error) {
        console.error('Error:', error);
    });

try {
    var data = JSON.parse(response);
} catch (e) {
    console.error('Invalid JSON:', e);
}

async function fetchData() {
    try {
        const response = await fetch('your-api-endpoint');
        const data = await response.json();
        console.log(data.key);
    } catch (error) {
        console.error('Error:', error);
    }
}
fetchData();