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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" } } 
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Object. key(). It returns the values of all properties in the object as an array. You can then loop through the values array by using any of the array looping methods.
There are two methods to iterate over an object which are discussed below: Method 1: Using for…in loop: The properties of the object can be iterated over using a for..in loop. This loop is used to iterate over all non-Symbol iterable properties of an object.
You have to pass the object you want to iterate, and the JavaScript Object. keys() method will return an array comprising all keys or property names. Then, you can iterate through that array and fetch the value of each property utilizing an array looping method such as the JavaScript forEach() loop.
You can use the for-in loop as shown by others. However, you also have to make sure that the key you get is an actual property of an object, and doesn't come from the prototype.
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]); } } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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