How do I remove the select option black border in Chrome?

问题

As shown in the picture below,

black border is shown when the select option is hover from the chrome.

how can I remove the border?

The code below didn't work.

select{

  &:hover,
  &:focus 
  {
    outline: 0 !important;
  }
}

I'd appreciate it if you could help me solve the problem.

回答1:

1. Go chrome flags

2. Disable #form-controls-refresh

来源：https://stackoverflow.com/questions/62013064/how-do-i-remove-the-select-option-black-border-in-chrome