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In which ways can we access the value of a property of an object?

Say you have this object:

const dog = {
  name: 'Roger'

To get the value of the name property, you can use the dot syntax, like this:

Or you can use the square brackets property accessor syntax:


This is especially useful when a property has not a valid variable name, like the name:

const dog = {
  'the name': 'Roger'

dog['the name']

and it’s also very useful when you don’t know the property name beforehand, and you evaluate it programmatically, like in this example that loops through the object property names:

const dog = {
  'the name': 'Roger'

for (const [key, value] of Object.entries(dog)) {
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