提交表单后如何将用户重定向到另一个页面？

Question

我想在 React JavaScript 中提交表单后重定向用户，例如，当用户提交表单时，他/她将他/她重定向到google.com或其他一些带有他/她在输入字段中输入的信息的 URL。 我创建了一个简单的归档和提交按钮。

这是我的示例代码

import React, { Component } from 'react';
import { withRouter } from 'react-router-dom';
class App extends Component {
  state = {
    firstName: '',
    showName: false
  }
  inputHandler = (e) => {
    let updatedName = e.target.value;
    this.setState({ firstName: updatedName });
    //console.log(updatedName);  
  }
  onSubmitHandler = (e) => {
    e.preventDefault();
    this.setState({
      showName: true
    });
  }
  render() {
    return (
      <div>
        <form
          onSubmit={this.onSubmitHandler}>
          <label>Enter the Name</label>
          <input type="text"
            name="firstName" onChange={this.inputHandler} value=
            {this.state.firstName} />
          <button type="submit" onClick={this.onSubmitHandler}>Submit</button>
          {this.state.showName && <p>"FirstName: " {this.state.firstName}</p>}
        </form>
      </div>
    );
  }
}
export default (App);

Answer 1

您可以使用 this.props.history.push 方法重定向。

  onSubmitHandler = (e) => {
    e.preventDefault();
   this.props.history.push('/dashboard')
  }

Answer 2

onSubmitHandler = (e) => {
    e.preventDefault();
    this.setState({
      showName: true
    });
    window.location.href = "someurl/somepage?var1="+this.state.var1+"&var2="+this.state.var2 + "......";
  }

Answer 3

Checking(event) {
    event.preventDefault();
    if (this.state.username === "" || this.state.password === "") {
      alert("Fields are required");
      return;
    }
    if (this.state.username == "subrata" && this.state.password === "1234") {
      this.props.history.push('/adminpanel')
      return;
    }else{
      alert("Login Failed ! . Check Username and Password.")
    }
     
    console.log(`${this.state.username}`)
}