function con't chang itself, i don't kone why?

[Suntgr]

function toBeRunOnce(args)  {
      // some stuff to do
      console.log('toBeRunOnce has completed');
      toBeRunOnce = function() {};
    }

standard: Use JavaScript Standard Style (https://standardjs.com)
D:\code......: 'toBeRunOnce' is a function.

[dtudury]

if you run standard with a -v you'll get a more informative:
D:\code......: 'toBeRunOnce' is a function. (no-func-assign)

googling "no-func-assign" returns the eslint description of the rule and the standardjs list of rules

[feross]

If you want to ignore the rule for this particular case, you can follow the instructions here: https://standardjs.com/#how-do-i-hide-a-certain-warning