``` onSave({ > 14 | ...item, | ^ 15 | title:this.refs.title.value, 16 | content:this.refs.content.value 17 | }) ``` ``` npm.cmd install --save-dev babel-plugin-transform-objec t-rest-spread ``` ``` npm.cmd install --save-dev @babel/plugin-proposal-objec t-rest-spread ```