Combining Vue.js and Knockout.js together

index.js

// skip import for KO (Knockout.js) here, it should be available in global deps
import Vue from 'vue';
import ProjectsConversationWrapper from 'ProjectsConversationWrapper';
import { getProjectConversation } from 'api';

// unique component identifier
const uniqueId = 'chat-project-room';

const bindingHandlerInit = async (element, valueAccessor) => {
  const projectId = parseInt(ko.unwrap(valueAccessor()), 10);

  // find conversation based on given project ID
  const { conversation } = await getProjectConversation(projectId);
  const conversationId = conversation.id;

  // our reactive data object observed by Vue
  const data = {
    conversationId,
  };

  // Vue setup
  const vueConfig = {
    el: `#${uniqueId}`,
    data,
    template: '<ProjectsConversationWrapper :conversation-id="conversationId"/>',
    components: { ProjectsConversationWrapper },
  };

  // create new Vue instance
  let vm = new Vue(vueConfig);

  // destroy Vue instance when KO component is disposed
  ko.utils.domNodeDisposal.addDisposeCallback(element, () => {
    vm.$destroy();
    vm = null;
  });
};

// create custom binding
ko.bindingHandlers.chatProjectRoom = {
  init: bindingHandlerInit,
};

// register new KO component
ko.components.register(uniqueId, {
  viewModel: ({ projectId }) => ({ projectId }),
  template: `
    <div data-bind="chatProjectRoom: projectId">
      <div id="${uniqueId}"></div>
    </div>
  `,
});