js 动态创建json文件

let jsonObject = {
    name: "John Doe",
    age: 30,
    city: "New York"
};

let jsonString = JSON.stringify(jsonObject);
console.log(jsonString); // 输出: {"name":"John Doe","age":30,"city":"New York"}

function downloadJSON(jsonData, fileName) {
    let dataStr = "data:text/json;charset=utf-8," + encodeURIComponent(JSON.stringify(jsonData));
    let downloadAnchorNode = document.createElement('a');
    downloadAnchorNode.setAttribute("href", dataStr);
    downloadAnchorNode.setAttribute("download", fileName + ".json");
    document.body.appendChild(downloadAnchorNode); // Required for Firefox
    downloadAnchorNode.click();
    downloadAnchorNode.remove(); 
}

// 使用示例
let jsonObject = { name: "John Doe", age: 30 };
downloadJSON(jsonObject, "user_data");

let specialChars = { text: "This is a \"test\" with special chars: \n and \t." };
let encodedJson = JSON.stringify(specialChars);
let decodedJson = JSON.parse(encodedJson);