Vue.js Error: 'TypeError: moment__WEBPACK_IMPORTED_MODULE_6___default(...)(...).formart is not a function' in ElButton Component

The error 'TypeError: moment__WEBPACK_IMPORTED_MODULE_6___default(...)(...).formart is not a function' in a Vue.js application using Element UI's ElButton component signals that the 'format' method is being called on an object that is not a valid moment object. This usually occurs due to one of the following reasons:

1. Incorrect Argument Passed to moment Function: The code might be providing an incorrect argument to the 'moment' function, leading to the result not being a valid moment object. Double-check that the input value passed to 'moment' is a valid date or time string or a valid Date object.

2. Incorrect Syntax for Using the 'format' Method: The syntax used to call the 'format' method may be incorrect. Ensure the 'format' method is being called on the correct moment object using the correct syntax, for instance, 'moment(date).format('YYYY-MM-DD')'.

Troubleshooting Steps:

1. Verify the Input: Examine the argument provided to the 'moment' function. It should be a valid date or time string or a valid Date object.

2. Inspect the Code: Review the code to confirm that the 'format' method is being invoked correctly and that the syntax aligns with moment.js documentation.

3. Debug Using Console: Utilize the browser's developer console to inspect the object on which the 'format' method is being called. This helps in identifying whether it's actually a moment object. If it isn't, pinpoint the source of the issue.

4. Consider Moment.js Version: If you're working with an older version of Moment.js, ensure it's up to date, as there might be compatibility issues with newer versions of Vue.js.

By addressing these potential causes and implementing the troubleshooting steps, you should be able to rectify the error and successfully utilize the 'format' method within your Vue.js application.