how do I hide/display the submit button in React JS - reactjs

Question

I am completely new to React JS, I have no Idea how to do in ReactJS.
I have to hide the Submit button initially, when keyin to dates fields then Submit button should be display.
class MyForm extends React.Component {
constructor(props) {
super(props);
this.state = { startdate: '', enddate: '' };
}
mySubmitHandler = (event) => {
event.preventDefault();
alert("You are submitting " + this.state.startdate +"and"+ this.state.enddate);
}
myChangeHandler = (event) => {
this.setState({startdate: event.target.value});
}
myEndDate = (event) => {
this.setState({enddate: event.target.value});
}
render() {
return (
<form onSubmit={this.mySubmitHandler}>
<img src="C:\\Users\\A9002255\\Desktop\is.jpg"></img>
<h2>Please select the Date range of .CSV </h2>
<input
type='date'
onChange={this.myChangeHandler}
/>
<span> </span>
<input
type="date"
onChange={this.myEndDate}
/>
<div>
<input
type='submit' value="Download" class="bi bi-cloud-arrow-down" style={{ width: '10%', height: 30}}
/>
</div>
</form>
);
}
}
ReactDOM.render(<MyForm />, document.getElementById('root'));
export default MyForm;

Answer 1

You can add check on base of start and end dates of your state.
Try following code
class MyForm extends React.Component {
constructor(props) {
super(props);
this.state = { startdate: '', enddate: '' };
}
mySubmitHandler = (event) => {
event.preventDefault();
alert("You are submitting " + this.state.startdate +"and"+ this.state.enddate);
}
myChangeHandler = (event) => {
this.setState({startdate: event.target.value});
}
myEndDate = (event) => {
this.setState({enddate: event.target.value});
}
render() {
return (
<form onSubmit={this.mySubmitHandler}>
<img src="C:\\Users\\A9002255\\Desktop\is.jpg"></img>
<h2>Please select the Date range of .CSV </h2>
<input
type='date'
onChange={this.myChangeHandler}
/>
<span> </span>
<input
type="date"
onChange={this.myEndDate}
/>
<div>
{this.state.startdate && this.state.enddate && <input
type='submit' value="Download" class="bi bi-cloud-arrow-down" style={{ width: '10%', height: 30}}
/>}
</div>
</form>
);
}
}
ReactDOM.render(<MyForm />, document.getElementById('root'));
export default MyForm;