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Lodash _.isSymbol

Overview

The lodash _.isSymbol method is a utility function in the Lodash library that checks whether a given value is a symbol primitive or a symbol object.

This method returns true if the input parameter is a symbol, and false otherwise.

Symbols, introduced in ECMAScript6, are a new primitive data type in JavaScript to represent unique values. They can be created using the Symbol() function, which returns a unique symbol that cannot be compared to any other value.

The _.isSymbol() method supports both symbol primitive and symbol object types in JavaScript.

This method can be used in various scenarios when you want to check if the given value is a symbol or not. For example, in a large codebase, you may want to ensure only symbols are passed as API arguments to increase code reliability and avoid bugs.

Since symbols are a new data type introduced in ECMAScript6, older browsers may not support this method. However, Lodash provides polyfills to ensure compatibility with older browsers.

In summary, the _.isSymbol() method is a useful utility function that helps to determine if a given value is a symbol or not. It can help to increase code reliability by ensuring only symbols are passed in specific scenarios.