How should I receive custom trait modifications in the script?

Hi, @artf, this is a great framework, thank you very much.

I am now using it to create components of the mobile BUI framework, and I ran into a problem, I added a custom trait textarea, how can I make this When the data changes, it is triggered in the output script.

editor.TraitManager.addType('textarea', {
    createInput({
      trait,
      component
    }) {
      // Here we can decide to use properties from the trait
      const el=document.createElement('div');
      el.innerHTML = `
      <textarea class="buiv-textarea" name="${options[0].name}" rows="${options[0].rows}">${options[0].value}</textarea>
    `;
      return el;
    },
    onEvent({
      elInput,
      component,
      event
    }) {
// The data change will reach this callback, you can operate the component, but how can we trigger the parameters received in the script? 
    },
    onUpdate({
      elInput,
      component,
      trait
    }) {
    },
  });

// use trait textarea 
editor.DomComponents.addType("slide", {
    model: defaultModel.extend({
      defaults: {
        ...defaultModel.prototype.defaults,
        name: "slide",
        content: `<div class="bui-slide bui-slide-skin01"></div>`,
        datas: '[{image:""}]',
        traits: [{
          type: 'textarea',
          name: 'datas',
          label: "data",
          changeProp: 1,
        }],
        script() {
        
          let parentId=this.id;
          // first time it is [{image:""}],  I want to listen 'datas' change trigger here.
          console.log('{[ datas ]}')

        },
      },
    }
    }),
    view: defaultView.extend({
      init() {
        const props=['loop', 'fullscreen', 'height', 'direction', 'visibleNum', 'scrollNum', 'datas', 'autoplay'];
        
        const reactTo = props.map(prop => `change:${prop}`).join(' ');

        this.listenTo(this.model, reactTo, this.render);

      }
    }),
  });