Singleton Pattern

Single object instance

GitHub code : https://github.com/FrancescoXX/Design-Patterns-Singleton-Javascript

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Creational pattern

⚡️Problem (we need)

• One configuration file, from different components
• Always the same file
• Guaranteed that there is only one file

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💡Intent

• Ensure a class only has one instance.
• Provide a global point of access to it.

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🔧 Apply

• One instance of a class is required
• It must be one access point
• Need to manage object instances

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✅Pro

• Single point of access to the instance
• Avoid global variables
• Ability to subclass the singleton class
• Configure the number of instances

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⚠️Cons

• State of the singleton must be shareable between program executions

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🏆 Great for

• Manage number of instances at runtime
• Provide one single unique access

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Structure

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GitHub code : https://github.com/FrancescoXX/Design-Patterns-Singleton-Javascript