`if __name__ == '__main__'` equivalent in javascript es6 modules

Question

Is it possible to check if JavaScript file is being run directly or if it was required as part of an es6 module import.

for example a main script is included.

<

Answer 1

The solution I see there is just to define the variable in the script you're importing. I.e. you define mainTest in main.js, and then use your existing if block.