js加载引用json文件

function loadJSON(url, callback) {
    var xhr = new XMLHttpRequest();
    xhr.overrideMimeType("application/json");
    xhr.open('GET', url, true);
    xhr.onreadystatechange = function () {
        if (xhr.readyState == 4 && xhr.status == 200) {
            callback(xhr.responseText);
        }
    };
    xhr.send(null);
}

loadJSON('data.json', function(response){
    var data = JSON.parse(response);
    console.log(data);
});

fetch('data.json')
    .then(response => response.json())
    .then(data => console.log(data))
    .catch(error => console.error('Error:', error));

async function loadJSONAsync(url) {
    try {
        let response = await fetch(url);
        let data = await response.json();
        console.log(data);
    } catch (error) {
        console.error('Error:', error);
    }
}

loadJSONAsync('data.json');