React - Preventing Form Submission

Question

I\'ve been experimenting with React. In my experiement, I\'m using the Reactstrap framework.When I click a button, I\'ve noticed that the HTML form submits. Is there a way t

Answer 1

componentDidUpdate(){               
    $(".wpcf7-submit").click( function(event) {
        event.preventDefault();
    })
}

You can use componentDidUpdate and event.preventDefault() to disable form submission.As react does not support return false.

Answer 2

There's another, more accessible solution: Don't put the action on your buttons. There's a lot of functionality built into forms already. Instead of handling button presses, handle form submissions and resets. Simply add onSubmit={handleSubmit} and onReset={handleReset} to your form elements.

To stop the actual submission just include event in your function and an event.preventDefault(); to stop the default submission behavior. Now your form behaves correctly from an accessibility standpoint and you're handling any form of submission the user might take.

Answer 3

preventDefault is what you're looking for. To just block the button from submitting

<Button onClick={this.onClickButton} ...

code

onClickButton (event) {
  event.preventDefault();
}

If you have a form which you want to handle in a custom way you can capture a higher level event onSubmit which will also stop that button from submitting.

<form onSubmit={this.onSubmit}>

and above in code

onSubmit (event) {
  event.preventDefault();

  // custom form handling here
}

Answer 4

2 ways

First one we pass the event in the argument right into the onClick.

  onTestClick(e) {
    e.preventDefault();
    alert('here');
  }

---

  // Look here we pass the args in the onClick
  <Button color="primary" onClick={e => this.onTestClick(e)}>primary</Button>&nbsp;

---

Second one we pass it into argument and we did right in the onClick

  onTestClick() {
    alert('here');
  }

---

  // Here we did right inside the onClick, but this is the best way
  <Button color="primary" onClick={e => (e.preventDefault(), this.onTestClick())}>primary</Button>&nbsp;

Hope that can help

Answer 5

import React, { Component } from 'react';

export class Form extends Component {
  constructor(props) {
    super();
    this.state = {
      username: '',
    };
  }
  handleUsername = (event) => {
    this.setState({
      username: event.target.value,
    });
  };

  submited = (event) => {
    alert(`Username: ${this.state.username},`);
    event.preventDefault();
  };
  render() {
    return (
      <div>
        <form onSubmit={this.submited}>
          <label>Username:</label>
          <input
            type="text"
            value={this.state.username}
            onChange={this.handleUsername}
          />
          <button>Submit</button>
        </form>
      </div>
    );
  }
}

export default Form;