javascript - 如何从隐藏的输入中获取一些 id 并使用 jquery 或 javascript 对其进行切片？

Question

我从隐藏的输入中得到了一些 id，比如:

<input type="hidden" id="files" name="files" value="103,104,105">

但是当我尝试将这些 id 添加到一个数组中时，它只是添加了一个字符串:

var id= $(this).parent('.added-files').attr("id");
var beforeIDs = $('#files').val(); 

if(beforeIDs == ''){    
    var photosIDs = [];
}else{
    var photosIDs = [beforeIDs];
}

console.log(photosIDs);

它的输出:

["103,104,105"]

I just want to like this output

[103,104,105]

and with that I can remove easily remove id.

By the way, my whole code is:

var id = $(this).parent('.added-files').attr("id");
val = id.replace('uploaded_file_','');

var beforeIDs = $('#files').val();
if(beforeIDs == ''){
    var photosIDs = [];
}else{
    var photosIDs = [beforeIDs];
}

console.log(photosIDs);

for(var i = photosIDs.length; i--;) {
    if(photosIDs[i] ===val) { 
        photosIDs.splice(i, 1);
    }
}

console.log(photosIDs);

我哪里错了？

谢谢。

Answer 1

您需要split() , 上的字符串。

这也将为您省去检查空值的步骤。

var beforeIDs = $('#files').val();

var photosIDs = beforeIDs.split(",");

console.log(photosIDs);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<input type="hidden" id="files" name="files" value="103,104,105">