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<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>
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function sumUp(object){
object.totalValue=0;
for(child of object.children){
 object.totalValue+=sumUp(child);
}
return object.totalValue+object.value;
}
var names = {
    name: 'name-1',
    value: 10,  
    valueTotal: 0, // should be 60 (name-1.1 + name-1.2 + name-1.2.1 + name-1.2.2 + name-1.2.2.1 + name-1.2.2.2)
    children: [{
        name: 'name-1.1',
        value: 10,
        valueTotal: 0,
        children: []
    }, {
        name: 'name-1.2',
        value: 10,
        valueTotal: 0, // should be 40 (name-1.2.1 + name-1.2.2 + name-1.2.2.1 + name-1.2.2.2)
        children: [{
            name: 'name-1.2.1',
            value: 10,
            valueTotal: 0,
            children: []
        }, {
            name: 'name-1.2.2',
            value: 10,
            valueTotal: 0, // should be 20 (name-1.2.2.1 + name-1.2.2.2)
            children: [{
                name: 'name-1.2.2.1',
                value: 10,
                valueTotal: 0,
                children: []
            }, {
                name: 'name-1.2.2.2',
                value: 10,
                valueTotal: 0,
                children: []
            }]
        }]
    }, {
        name: 'name-2',
        value: 10,
        valueTotal: 0,
        children: []
    }]
};
console.log(sumUp(names),names);
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