Friday, 20 July 2018

How to loop through a plain JavaScript object with the objects as members?

Answer


Answer




How can I loop through all members in a JavaScript object including values that are objects.



For example, how could I loop through this (accessing the "your_name" and "your_message" for each)?




var validation_messages = {
    "key_1": {
        "your_name": "jimmy",
        "your_msg": "hello world"
    },
    "key_2": {
        "your_name": "billy",
        "your_msg": "foo equals bar"
    }
}


Answer



for (var key in validation_messages) {
    // skip loop if the property is from prototype
    if (!validation_messages.hasOwnProperty(key)) continue;

    var obj = validation_messages[key];
    for (var prop in obj) {
        // skip loop if the property is from prototype
        if (!obj.hasOwnProperty(prop)) continue;


        // your code
        alert(prop + " = " + obj[prop]);
    }
}

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