src/directives/expr.js
import { avalon } from '../seed/core'
avalon.directive('expr', {
update: function (vdom, value) {
value = (value == null || value === '') ? '\u200b' : value
vdom.nodeValue = value
//https://github.com/RubyLouvre/avalon/issues/1834
if(vdom.dom)
vdom.dom.data = value
}
})