Running an api in the background of the loaded page

[LEVI HAVIV]

I'm trying to execute an api on a button click,
For example, the following command:

const api = await app.require('api');
    await api.put(`/groups/test/membership/1550`);

Hi, you are executing an api command through a browser, I am looking for a way to embed this script in Nodbibi, and that it will be activated immediately when the page is loaded, (can also be done when a button is pressed).
But no option works, I tried onload, and it doesn't work. I tried with btn - to be activated with id. doesn't work either.
On the other hand, the script works by itself when you run it in the console.
Need urgent help, thanks!

[julian]

const api = await app.require('api');

You can only use this from within browser dev console (and some limited other places).

Instead you should use

require(['api'], (api) => {
    api.put(`/groups/test/membership/1550`).then(() => { ... });
});