如何在rails上使用webpacker的uppy

Question

我试着在rails上的webpacker上使用uppy，我在工作中遇到了困难：

//  app/javascripts/src/javascript/my_scripts.js    
const Uppy = require('@uppy/core')
const DragDrop = require('@uppy/drag-drop')
const ProgressBar = require('@uppy/progress-bar')

const uppyOne = new Uppy({debug: true, autoProceed: true})
uppyOne.use(DragDrop, { target: '.UppyDragDrop-One' })

这是我收到的控制台错误：

[Uppy] [23:29:46] Not installing DragDrop
Plugin.js:165 Uncaught Error: Invalid target option given to DragDrop. Please make sure that the element 
      exists on the page, or that the plugin you are targeting has been installed. Check that the <script> tag initializing Uppy 
      comes at the bottom of the page, before the closing </body> tag (see https://github.com/transloadit/uppy/issues/1042).
    at DragDrop.mount (Plugin.js:165)
    at DragDrop.install (index.js:204)
    at Uppy.use (index.js:901)
    at Object.<anonymous> (uppy.js:6)
    at __webpack_require__ (bootstrap a698a4c3b9adcd1bf843:19)
    at Object.<anonymous> (application.js:1)
    at __webpack_require__ (bootstrap a698a4c3b9adcd1bf843:19)
    at bootstrap a698a4c3b9adcd1bf843:62
    at bootstrap a698a4c3b9adcd1bf843:62

Answer 1

我发现了这个问题，因为在rails中，通常链接到布局文件头上的所有JS文件，但是类'.UppyDragDrop‘的元素还没有呈现出来。

要解决这个问题，您需要在提供带有javascript_pack_tag元素的元素之后，通过DragDrog单独链接到javascript。