formal parameter name expected
时间: 2023-12-11 14:04:58 浏览: 68
This error occurs when a function or method is defined with a parameter, but the parameter name is missing. It means that the function or method is expecting a name for the parameter but none was provided.
For example, consider the following function definition:
```
function calculateArea(width, height, ) {
return width * height;
}
```
In this case, there is a trailing comma after the `height` parameter, which is causing the error. The function is expecting a parameter name after the comma, but there is none. To fix this error, simply remove the trailing comma:
```
function calculateArea(width, height) {
return width * height;
}
```
It is important to ensure that all function and method parameter names are properly defined to avoid this error.