@monroygwenole
What is a Symbol in JavaScript?
š A Symbol is a special data type in JavaScript used to create unique identifiers for objects. They are often used to implement internal mechanisms of the language or to create private properties of an object.
š Symbols are used in various situations. For example, they can be used to create unique keys in objects, which helps avoid naming conflicts. They can also be used to implement internal mechanisms of the language, such as iterators.
š For instance, you can create "hidden" properties of objects, as shown in the second example in the photo, but due to the behavior of console.log() in Node.js, these data will still be displayed in the console. However, with regular data iteration (e.g., for...in or Object.keys()) and in browsers where console.log() by default does not output symbolic properties, these data will be "hidden".
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