使用cUrl时没有输出(No output when using cUrl)

 非常简单的JSON数据库示例 
 
 我编写了一些代码，使您能够将背景颜色的状态保存在JSON文件中，该文件将存储在服务器上。 
 
 本质上，JSON文件作为一个简单的数据库（你可能不应该以这种方式实现它，但它对初学者来说很简单）可以集中数据，允许所有用户看到相同状态的盒子。 
 
 这是你如何实现这一目标的： 
 
 index.js ： 
 
$.getJSON("https://api.myjson.com/bins/4zzaa", function(data){
    if (data.clicked) {
        $("#box").addClass("clicked");
    }
    $("#box").addClass("loaded");
})
.fail(function(){
    //Handle JSON fetch error
});

$('#box').click(function(){
    var isClicked = $(this).hasClass("clicked") ? false : true;
    var str = JSON.stringify({clicked: isClicked});
    $.ajax({
        url:"https://api.myjson.com/bins/4zzaa",
        type:"PUT",
        data: str,
        contentType:"application/json; charset=utf-8",
        dataType:"json",
        success: function(data, textStatus, jqXHR){
            $("#box").toggleClass("clicked");
        }
    })
    .fail(function(){
        //Handle PUT error
    });
});
 
 https://api.myjson.com/bins/4zzaa ： 
 
{
    "clicked": "true"
}
 
 我真的建议在jquery.getJSON()和jQuery.ajax()上做一些阅读。 这些将是一个很好的起点。 
 
 这是我的小提琴 - 请注意，在使用它时，您必须替换getJSON和ajax方法中的URL。 
 
 希望这可以帮助！ 

Very simple JSON Database Example
 
I have written some code that will enable you to save the state of the background color in a JSON file, which you would store on your server. 
 
Essentially, the JSON file functions as a simple database (you probably shouldn't implement it this way, but it's simple enough for a beginner to understand) which centralizes the data, allowing all the users to see the box in the same state.
 
This is how you could achieve this:
 
index.js:
 
$.getJSON("https://api.myjson.com/bins/4zzaa", function(data){
    if (data.clicked) {
        $("#box").addClass("clicked");
    }
    $("#box").addClass("loaded");
})
.fail(function(){
    //Handle JSON fetch error
});

$('#box').click(function(){
    var isClicked = $(this).hasClass("clicked") ? false : true;
    var str = JSON.stringify({clicked: isClicked});
    $.ajax({
        url:"https://api.myjson.com/bins/4zzaa",
        type:"PUT",
        data: str,
        contentType:"application/json; charset=utf-8",
        dataType:"json",
        success: function(data, textStatus, jqXHR){
            $("#box").toggleClass("clicked");
        }
    })
    .fail(function(){
        //Handle PUT error
    });
});
 
https://api.myjson.com/bins/4zzaa:
 
{
    "clicked": "true"
}
 
I seriously suggest doing some reading on jquery.getJSON() and jQuery.ajax(). These will be a good starting point for you.
 
Here's my fiddle - note that you will have to replace the URLs in the getJSON and ajax methods when you use it.
 
Hope this helps!