## Object.assign
Copy all properties of an object to another object
- Object.assign(target, ...sources)
- Object.assign(this.form, stepData) // copies stepData object into the this.form object
- Properties in the target object will be overwritten by properties in the sources if they have the same key.
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## Object.keys and Object.values
- Creates an arraoy of every property's key or value in the object
- const fruits = {apple: 28, orange: 17, pear: 54}
- Object.keys(fruits) // [“apple”, “orange”, “pear”]
- Object.values(fruits) // 28, 17, 54