Javascript 在 onChange 事件中调用 2 个函数
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Call 2 functions within onChange event
提问by Ilja
I'm a bit stuck with my component, I need to call onChange from props so
我的组件有点卡住了，我需要从 props 调用 onChange 所以
<input type="text" value={this.state.text} onChange={this.props.onChange} />
but also call another function within the component called handleChange()that updates the state.text, I tried
但也调用组件中的另一个函数handleChange()来更新 state.text，我试过了
<input type="text" value={this.state.text} onChange={this.props.onChange; this.handleChange} />
but this doesn't seem to work.
但这似乎不起作用。
回答by diiN__________
You can do it by putting the two functions in double quotes:
您可以通过将两个函数放在双引号中来实现：
<input type="text" value={this.state.text} onChange="this.props.onChange(); this.handleChange();" />
This should work. But it would be better if you call the second function within the first one:
这应该有效。但是如果你在第一个函数中调用第二个函数会更好：
function testFunction() {
onChange();
handleChange();
}
回答by Carl Vitullo
function(e) {this.props.onChange(e); this.handleChange(e)}.bind(this)
function(e) {this.props.onChange(e); this.handleChange(e)}.bind(this)
You might not need .bind(this), but I suspect you will.
你可能不需要.bind(this)，但我怀疑你会。
This will create a new function on each render, so it'd be better in certain respects to have that function be a component method, but this should work.
这将在每次渲染时创建一个新函数，因此在某些方面最好将该函数作为组件方法，但这应该可行。
回答by Julia Stanina
If you want inline solution, you can do something like this:
如果您想要内联解决方案，您可以执行以下操作：
<input type="text" value={this.state.text} onInput={this.props.onChange} onChange={this.props.handleChange} />
Difference between onInput and onChage is here:
onInput 和 onChage 之间的区别在这里：
Difference between "change" and "input" event for an `input` element
