JavaScript can work with missing values, but problems can happen when your code tries to use a value that is null. You may see an error like this: You may also see something more specific, such as: At first, this error may look confusing. But the meaning is simple: your code is trying to read […]

JavaScript usually lets you make small mistakes without stopping the program. But sometimes, even one missing value can cause an error and stop the code from running. You may see an error like this: You may also see something more specific, such as: At first, this error message looks confusing. But it is actually telling […]