javascript 我可以在 React 中将输入字段设置为只读，同时保留我的 onChange 函数吗？
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Can I set an input field to readonly in React while keeping my onChange function?
提问by jrader
I have the following React render function:
我有以下 React 渲染函数：
render: function() {
return <input type="text" name="my-input-field" value={this.state.myObject} onChange={myFunction} />;
}
I would like to have this input field be readonly upon some condition that I have checked for. My understanding is that this input field would default to readonly if I didn't have the onChange function. Simply adding the readOnly tag hasn't worked for me.
我想让这个输入字段在我检查过的某些条件下是只读的。我的理解是，如果我没有 onChange 函数，则此输入字段将默认为只读。简单地添加 readOnly 标签对我不起作用。
How can i rewrite this so that I can later change the readonly status?
我如何重写它以便我以后可以更改只读状态？
回答by gusgol
You can use spread attributes to do that:
您可以使用传播属性来做到这一点：
render: function() {
var opts = {};
if( /* here your condition */ ) {
opts['readOnly'] = 'readOnly';
}
return (
<input
type="text"
name="my-input-field"
value={this.state.myObject}
onChange={myFunction}
{...opts}
/>
);
}
