Unfortunately, you cannot use quill-better-table with ngx-quill wrapper. ngx-quill is still based on quilljs v1. quill-better-table requires quilljs v2.0.0-dev.3. You can read about that in the Requirements section: here

I can share with you how I implemented simple paste and read table in my case. Its inspired by this article and created with custom block. And its not a correct way to add elements to quill. But we are using editor internally so we are sure that it is in safe hands.

1. Create a new 'Block Embed' like this:

import Quill from 'quill';
const BlockEmbed = Quill.import('blots/block/embed');

    export class TableBlockEmbed extends BlockEmbed {

      static blotName = 'TableBlockEmbed';
      static tagName = 'table';

      static create(value) {
        const node = super.create();
        let valueToReturn = value;
        if (!value.includes('assignedTableId')) {
          const tableId = `assignedTableId-${Date.now()}`;
          valueToReturn = value
            .replace('#tableId', `#${tableId}`)
            .replace('table-layout: fixed;', '');
          node.setAttribute('id', tableId);
        } else {
          const existedId = valueToReturn.match(/#assignedTableId-(\d+)/i)[1];
          node.setAttribute('id', `assignedTableId-${existedId}`);
        }
        node.innerHTML = this.transformValue(valueToReturn);
        return node;
      }

      static transformValue(value) {
        let handleArr = value.split('\n');
        handleArr = handleArr.map(e => e.replace(/^[\s]+/, '')
          .replace(/[\s]+$/, ''));
        return handleArr.join('');
      }

      static value(node) {
        return node.innerHTML;
      }
    }

2. Run registration of new embed block in the constructor of your component which uses ngx-quill:

constructor() {
    Quill.register(TableBlockEmbed, true);
  }

3. add on editor Created this code below. (you can of course add/remove styles here you need. I added for example margin: 0 auto !important; because I want to force table to be always centered):

onEditorCreated(quill: Quill): void {
    quill.clipboard.addMatcher('TABLE', (node, delta) => {
      const Delta = Quill.import('delta');
      const tableTagStyles = node.getAttribute('style');
      return new Delta([
        {
          insert: {
            TableBlockEmbed:
              `<style>#tableId {${tableTagStyles} margin: 0 auto !important; }</style>` + delta.ops[0].insert.TableBlockEmbed
          }
        }
      ]);
    });
  }

4. I added also some styles:

quill-view,
quill-editor{
  ::ng-deep {
    table {
      width: 100%; // if table has no width - then give it by default 100%
      max-width: 100% !important;
      box-sizing: border-box;
    }
  }
}

I know this solution is just workaround but until waiting for ngx-quill based on quill 2, I was able at least to give the feature of pasting tables inside the editor which looks quite nice.

Example:

table in office word:

table in ngx-quill:

table in excel:

table in ngx-quill: