下面我循环一个包含一堆问题的对象。渲染对象时,使用问题和输入标记,on change change事件处理程序会中断。想法?
convertPropsIntoObject(){
var obj = this.state.questionMap
var data = _.map(obj, function(value, prop) {
return (
<div className="field" key={uuidv4()}>
<label className="label">{prop}
</label>
<div className="control">
<textarea
className="textarea"
placeholder={'Enter your response here'}
defaultValue={value}
onChange={e => this.handleChange}
/>
</div>
</div>
)
});
return (
<form onSubmit={e => this.handleSubmit(e)}>
{data}
<button className="button is-success is-outlined">Resubmit your responses</button>
</form>
)
}
这是我的错误
TypeError: Cannot read property 'handleChange' of undefined
onChange
src/Components/CompletedSubmission/CompletedIceBreakerForm.js:40
37 | className="textarea"
38 | placeholder={'Enter your response here'}
39 | defaultValue={value}
> 40 | onChange={e => this.handleChange()}
41 | />
42 | </div>
43 | </div>
答案 0 :(得分:2)
gradle build -Pclient=client1
的回调是在不同的执行上下文中调用的,因此_.map
关键字将引用lodash。
使用箭头函数代替隐式this
绑定:
this