使用 VueJS 3 App 调用 Laravel 8 登录 API

Question

I'm new to programming with VueJs, and I'm making a simple app that allows the user to login and once authenticated show a list of services in a table.

I manage authentication through Laravel, then I expose APIs (tested with Insomnia and working correctly) that I call from my VueJS application.

So I made in my Vue project a component called LoginPage.vue and in which I call the API for login. To do this I have read documentation and examples online.

I have this problem, when I fill in the login form and click on the Login button on the browser opening the developer tools, in the console I have error 404.

Having no experience with vue I cannot understand what the problem may be.

I appreciate any advice or suggestions

• LoginPage.vue

<template>
  <div class="hello">
    <h1>{{ msg }}</h1>
    <p>Compila il form sottostante con le tue credenziali per effettuare il login</p>
    <div>
      <form v-on:submit.prevent="loginForm">
        <div class="form-group">
          <input
            type="text"
            class="form-control"
            placeholder="Immetti la tua mail"
            id="mail"
            v-model="mail"
          >
        </div>
        <div class="form-group">
          <input
            type="password"
            class="form-control"
            placeholder="Immetti la tua password"
            id="psw"
            v-model="psw"
          >
        </div>
          <button class="btn btn-primary">Login</button>
      </form>
    </div>
    <p>oppure accedi con la tua identit&agrave; digitale SPID</p>
    <div> TODO - SPID BUTTON HERE</div>
  </div>
</template>

<script>

export default {
  name: "LoginPage",
  props: {
    msg: String,
  },
  data() {
    return {
      info: null
    };
  },
  created() {
    // Simple POST request with a JSON body using fetch
    const requestOptions = {
      method: "POST",
      headers: { "Content-Type": "application/json" }
    };
    fetch("http://localhost:8000/api/login", requestOptions)
      .then(response => response.json())
      .then(data => (this.info = data));
  }
};

</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
h3 {
  margin: 40px 0 0;
}
ul {
  list-style-type: none;
  padding: 0;
}
li {
  display: inline-block;
  margin: 0 10px;
}
a {
  color: #42b983;
}
</style>

Answer 1

First of all you have your api call in the created lifecycle hook and what you want is to bind the api call to the button clicked in your form. I also don't see any models in your data object. You are using the fetch api wrong, let me explain:

The steps:

1. Setup the correct markup for a form
2. Make the user object with the keys email and password and put that in your data object.
3. When you use submit.prevent you will need to add a button in the form with the type submit
4. Create a function in the methods object of Vuejs and add that to submit.prevent in your form

Here is an example with a test api:

 const template = ` <div> <form class="login-form" @submit.prevent="doLogin"> <div class="form-field"> <input type="text" placeholder="Email" v-model="user.email" /> </div> <div class="form-field"> <input type="password" placeholder="Wachtwoord" v-model="user.password" /> </div> <div class="form-action"> <button class="login-btn" type="submit">Submit</button> </div> </form> <span v-if="loading && !show">Loading...</span> <div v-else-if="show"> <p>Login success: {{ successMessage }}</p> <p>Token: {{ token }} </p> </div> </div> `; const LoginForm = { name: 'LoginForm', data() { return { user: { email: 'eve.holt@reqres.in', password: 'cityslicka' }, show: false, loading: false, successMessage: '', token: '' } }, template, methods: { async postData(url = '', data = {}) { const response = await fetch(url, { method: 'POST', // *GET, POST, PUT, DELETE, etc. headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(data) }); return response.json(); // parses JSON response into native JavaScript objects }, doLogin() { this.loading = true this.postData('https://reqres.in/api/login', this.user) .then(data => { const { token } = data; this.token = token; this.successMessage = 'Yes sir!'; this.loading = false; this.show = true; }); } } }; new Vue({ el: '#root', components: { LoginForm }, template: `<LoginForm />` })

 <script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script> <div id="root"></div>