how can i change the width of an dropdown list as his actually input size

im programming a backend system with emberjs and i use the ember select for dropdowns.

the problem that i have is that the list has the same width of the input field.

is their an way to give the list a nother width as the input? In dev tools it looks like that the width is given dynamicly (pic 2)

i didn't found a solution, to change the width dynamicly so it fits to the content in the list

that's how it should look like