What is the purpose of the 'bind' method in JavaScript?

The 'bind' method in JavaScript serves the purpose of creating a new function that, when called, has its 'this' keyword set to a specific value. This allows developers to control the context in which a function is executed, ensuring that the desired object is referenced as 'this', regardless of how the function is invoked later.

For example, if you have a method of an object that you want to pass as a callback but still need it to operate within the context of that original object, you would use 'bind' to set the correct 'this' value. This is particularly useful in scenarios such as event handling and asynchronous calls, where the context may otherwise be lost.

The clarity of 'bind' in defining the context of 'this' is what makes it a powerful tool in JavaScript programming, especially when dealing with functions that are used in different contexts or as callbacks.