JavaScript SyntaxError: Unexpected token '??=' - How to Fix

The error message "SyntaxError: Unexpected token '??='" indicates that the code contains an unexpected token, specifically the '??=' operator. \n\nThe '??=' operator is known as the nullish coalescing assignment operator and it is used to assign a value to a variable only if the variable is null or undefined. However, this operator is not supported in all JavaScript environments, particularly in older browsers or Node.js versions.\n\nTo fix this error, you have a few options:\n\n1. Use a different operator or method to assign a default value to a variable, depending on your specific use case. For example, you can use the logical OR operator (||) or the ternary operator (?:) to achieve similar functionality.\n\n2. If you need to use the nullish coalescing operator, make sure you are using an environment that supports it, such as a modern browser or a recent version of Node.js. If you are targeting older environments, consider transpiling your code using a tool like Babel to ensure compatibility.\n\nHere is an example of using the logical OR operator to assign a default value:\n\njavascript\nlet myVariable = null;\nmyVariable = myVariable || 'default value';\nconsole.log(myVariable); // Output: 'default value'\n\n\nAnd here is an example using the ternary operator:\n\njavascript\nlet myVariable = null;\nmyVariable = myVariable !== null && myVariable !== undefined ? myVariable : 'default value';\nconsole.log(myVariable); // Output: 'default value'\n