Javascript json字符串化结果在特定键上获取值

我这里有一个stringfy json，我想知道如何获取这个json对象中所有menuname的值

更新：

我试过这个 但我在控制台中没有定义

更新

[{"displayorder":"1","menuname":"DashBoard","menuid":"5","menuurl":"dashboard.php"},{"displayorder":"3","menuname":"Accounting Module","menuid":"3","menuurl":""},{"displayorder":"4","menuname":"My Profile","menuid":"4","menuurl":"myprofile.php"},{"displayorder":"6","menuname":"HR Module","menuid":"2","menuurl":""},{"displayorder":"9","menuname":"Administrator","menuid":"1","menuurl":""}]

如何使用

parentid

获取第二个json中的所有详细信息取决于上面的

menuid

？

工作示例：

文件更新 如果您签出，您将看到以下内容：

使用三个参数调用回调：

• 元素值
• 元素索引
• 正在遍历的数组

因此，

idx

只是表示元素索引的常用方法。您可以随意调用它-

index

，

myRandomName

，等等。

var myjson=[{“显示顺序”：“1”，“menuname”：“DashBoard”，“menuid”：“5”，“menuurl”：“DashBoard.php”}，{“displayorder”：“3”，“menuurl”：“会计模块”，“menuid”：“3”，“menuurl”：“}，{“displayorder”：“4”，“menuurl”：“我的档案”，“menuurl”：“myprofile.php”}，{“displayorder”：“6”，“menuname”：“HR模块”，“menuid”：“2”，“menuurl”：“}，{“displayorder”：“9”，“menuname”：“Administrator”，“menuid”：“1”，“menuurl”：“}]；
var json = [{"displayorder":"1","menuname":"DashBoard","menuid":"5","menuurl":"dashboard.php"},{"displayorder":"3","menuname":"Accounting Module","menuid":"3","menuurl":""},{"displayorder":"4","menuname":"My Profile","menuid":"4","menuurl":"myprofile.php"},{"displayorder":"6","menuname":"HR Module","menuid":"2","menuurl":""},{"displayorder":"9","menuname":"Administrator","menuid":"1","menuurl":""}];

    
json.forEach(function(el, idx){
    console.log(el.menuname);
});

变量菜单名称=[]；
for（var x=0；x

我需要8分钟来勾选答案请问idx是什么explain@HogRider请参见答案底部的“我的文档更新”。

var json = [{"displayorder":"1","menuname":"DashBoard","menuid":"5","menuurl":"dashboard.php"},{"displayorder":"3","menuname":"Accounting Module","menuid":"3","menuurl":""},{"displayorder":"4","menuname":"My Profile","menuid":"4","menuurl":"myprofile.php"},{"displayorder":"6","menuname":"HR Module","menuid":"2","menuurl":""},{"displayorder":"9","menuname":"Administrator","menuid":"1","menuurl":""}];

    
json.forEach(function(el, idx){
    console.log(el.menuname);
});

var myjson = [{"displayorder":"1","menuname":"DashBoard","menuid":"5","menuurl":"dashboard.php"},{"displayorder":"3","menuname":"Accounting Module","menuid":"3","menuurl":""},{"displayorder":"4","menuname":"My Profile","menuid":"4","menuurl":"myprofile.php"},{"displayorder":"6","menuname":"HR Module","menuid":"2","menuurl":""},{"displayorder":"9","menuname":"Administrator","menuid":"1","menuurl":""}]; 


var menu_names = []; 

for (var x = 0 ; x < myjson.length; x++){
    if(myjson[x].hasOwnProperty('menuname')){
        // do something usefull here 
        console.log(myjson[x]['menuname']);
        // add value to new array 
        menu_names.push(myjson[x]['menuname'])
    }
}

console.log(menu_names);