When you save values not as key:value pairs but only as key it saves them as keys within a JS object-CodePudding

For example when you have an object

const obj = {
   time,
   difficulty,
   distance,
}

The values that are inside of the object are saved as keys, correct? If I was to call Object.keys() on the object I would receive array of individual string elements?

CodePudding user response：

Using that notation, the property name will be the key, and the property value will be the value. This syntax was introductes in ES6.

It is the same as

const obj = {
 'time': time,
 'difficulty': difficulty,
 'distance': distance
}

CodePudding user response：

When you call Object.keys() it returns an array of the property names, not their values.

You can use an object like an associative array to make it act like a key/value pair.

someObject[“someKeyName”]