Also experiencing the same thing currently.
I assume you also just simply imported the ckeditor.js from the build folder. In My case I had to manually define the config for the editor:
Component
import * as CustomEditor from "src/app/ckeditor5-custom-build/build/ckeditor";
//...
public Editor = CustomEditor;
config: CKEditorConfig = {
placeholder: "Write your answer here.",
// BUG: Current CKEditor5's generated build does not
// show the default toolbar as defined in the online builder
toolbar: [
"bold", "italic", "underline", "code", "|",
"blockquote", "codeblock", "bulletedlist", "numberedlist", "|",
"link", "image", "|",
"Format",
],
};
Template
<ckeditor [editor]="Editor" [config]="config" [data]="data"></ckeditor>
DISCLAIMER
The current problem here is that the "image" toolbar item is not working as expected. The above code only shows the toolbar and successfully shows the "code" and "codeblock" toolbar items (This are separate CKEditor Plugins Just like the "image")
UPDATE (as of Nov. 9, 2020)
I can confirm that when you add editor build from online builder straight to the Angular app, the toolbar is missing. The case here is - build from OB has builtinPlugins, but is missing defaultConfig - the config is in ckeditor5/sample/index.html. If you add this config to ckeditor5/src/ckeditor.js, for example like this:
Editor.defaultConfig = {
toolbar: {
items: [
'heading', '|', 'bold', 'italic', 'link',
'bulletedList', numberedList', '|', 'indent', 'outdent', '|',
'imageUpload',
'blockQuote',
'insertTable',
'mediaEmbed',
'undo', 'redo'
]
},
language: 'en',
image: {
toolbar: [
'imageTextAlternative',
'imageStyle:full',
'imageStyle:side'
]
},