fix(api.js): expose `fileDropEnabled` in `WebviewWindow` constructor

[wesin]

when i create a new WebviewWindow. the h5 drag & drop is not supported

    const webview = new WebviewWindow(e.id, {
      url: '/#/expDesign',
      center: true,
      title: e.name,
    });
    webview.once('tauri://created', function () {
      console.log('new window');
    });

but if i use navigate the page it works.

  const openWebUrl = () => {
    navigate('/expDesign');
  };

so maybe thie fileDropEnabled is not suppert the multiwindos.

but my destination is to create a new WebviewWindow.
i have set the fileDropEnabled:fase in the tauri.conf.json

my enviroment is

• win10
• "react": "^17.0.2",
• "@tauri-apps/api": "^1.0.0-beta.8",

[FabianLars]

i have set the fileDropEnabled:fase in the tauri.conf.json

Actually, no you didn't. This property is set on a per-window basis, which means you'd have to set it inside the WebviewWindow constructor, but this property is indeed not exposed in JavaScript at the moment.
A workaround would be to create the window in rust where file_drop_enabled is available on the WebviewAttributes struct.
But it's a good idea to make this possible in JavaScript too, so I guess we'll change that (if possible).