javascript - 从纯 javascript 访问 Vue Prop

Question

我正在我的应用程序中实现 Stripe，而 Stripe 文档只显示纯 JS，因此我一直将 Stripe API 调用放在 script 标记中，而没有任何 Vue 方法。到目前为止一切正常。我正在从父组件向下传递 Prop ，但我无法从脚本内部访问 Prop 。

一些 Stripe 文档说在 HTML 呈现后实现 JS，所以我使用 mounted 方法来实现其中的一些。关于如何让它工作的任何想法？

我已经尝试将 API 调用放在一个方法中并在表单上的 click 事件上调用该方法，但是当我这样做时它不知道 token 是 Stripe 使用的。

在代码的底部，您可以看到我尝试获取 props 中的 this.plan 的位置。

    <template>
  <form method="post" id="payment-form">
    <h4 class="h4Spacing">Billing Information</h4>
    <div class="form-group">
      <b-form-input type="email" class="form-control" id="email" placeholder="Email Address"/>
    </div>
    <div class="form-group">
      <b-form-input  type="text" class="form-control" id="name_on_card" name="name" placeholder="Name on Card"/>
    </div>
    <div class="form-group">
      <b-form-input type="text" class="form-control" id="address" name="address_line1" placeholder="Address"/>
    </div>
    <div class="form-group">
      <b-form-input type="text" class="form-control" id="city" name="address_city" placeholder="City"/>
    </div>
    <div class="form-group">
      <b-form-input type="text" class="form-control" id="state" placeholder="State"/>
    </div>
    <div class="form-group">
      <div id="card-element" class="form-control">
        <!-- A Stripe Element will be inserted here. -->
      </div>
      <div v-if="successful">
        <h3 class="title" data-tid="elements_examples.success.title">Payment successful</h3>
        <p class="message"><span data-tid="elements_examples.success.message">Thanks for trying Stripe Elements. No money was charged, but we generated a token: </span><span class="token">tok_189gMN2eZvKYlo2CwTBv9KKh</span></p>
        <a class="reset" href="#">
          <svg width="32px" height="32px" viewBox="0 0 32 32" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
            <path fill="#000000" d="M15,7.05492878 C10.5000495,7.55237307 7,11.3674463 7,16 C7,20.9705627 11.0294373,25 16,25 C20.9705627,25 25,20.9705627 25,16 C25,15.3627484 24.4834055,14.8461538 23.8461538,14.8461538 C23.2089022,14.8461538 22.6923077,15.3627484 22.6923077,16 C22.6923077,19.6960595 19.6960595,22.6923077 16,22.6923077 C12.3039405,22.6923077 9.30769231,19.6960595 9.30769231,16 C9.30769231,12.3039405 12.3039405,9.30769231 16,9.30769231 L16,12.0841673 C16,12.1800431 16.0275652,12.2738974 16.0794108,12.354546 C16.2287368,12.5868311 16.5380938,12.6540826 16.7703788,12.5047565 L22.3457501,8.92058924 L22.3457501,8.92058924 C22.4060014,8.88185624 22.4572275,8.83063012 22.4959605,8.7703788 C22.6452866,8.53809377 22.5780351,8.22873685 22.3457501,8.07941076 L22.3457501,8.07941076 L16.7703788,4.49524351 C16.6897301,4.44339794 16.5958758,4.41583275 16.5,4.41583275 C16.2238576,4.41583275 16,4.63969037 16,4.91583275 L16,7 L15,7 L15,7.05492878 Z M16,32 C7.163444,32 0,24.836556 0,16 C0,7.163444 7.163444,0 16,0 C24.836556,0 32,7.163444 32,16 C32,24.836556 24.836556,32 16,32 Z"></path>
          </svg>
        </a>
        <div class="caption">
          <span data-tid="elements_examples.caption.no_charge" class="no-charge">Your card won't be charged</span>
          <a class="source" href="https://github.com/stripe/elements-examples/#example-1">
            <svg width="16px" height="10px" viewBox="0 0 16 10" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
              <path d="M1,8 L12,8 C12.5522847,8 13,8.44771525 13,9 C13,9.55228475 12.5522847,10 12,10 L1,10 C0.44771525,10 6.76353751e-17,9.55228475 0,9 C-6.76353751e-17,8.44771525 0.44771525,8 1,8 L1,8 Z M1,4 L8,4 C8.55228475,4 9,4.44771525 9,5 C9,5.55228475 8.55228475,6 8,6 L1,6 C0.44771525,6 6.76353751e-17,5.55228475 0,5 C-6.76353751e-17,4.44771525 0.44771525,4 1,4 L1,4 Z M1,0 L15,0 C15.5522847,-1.01453063e-16 16,0.44771525 16,1 L16,1 C16,1.55228475 15.5522847,2 15,2 L1,2 C0.44771525,2 6.76353751e-17,1.55228475 0,1 L0,1 L0,1 C-6.76353751e-17,0.44771525 0.44771525,1.01453063e-16 1,0 L1,0 Z" fill="#AAB7C4"></path>
            </svg>
            <span data-tid="elements_examples.caption.view_source">View source on GitHub</span>
          </a>
        </div>
      </div>

      </div>



  <!--  <form action="/charge" method="post" id="payment-form">-->
<!--    <div class="form-row">-->
<!--      <label for="name"> Name </label>-->
<!--      <div id="name"></div>-->



<!--      <label for="card-element">-->
<!--        Credit or debit card-->
<!--      </label>-->
<!--      <div id="card-element">-->
<!--        &lt;!&ndash; A Stripe Element will be inserted here. &ndash;&gt;-->
<!--      </div>-->

<!--      &lt;!&ndash; Used to display form errors. &ndash;&gt;-->
<!--      <div id="card-errors" role="alert"></div>-->
<!--    </div>-->

<!--    <b-button class="space" id="payment-request-button">Submit Payment</b-button>-->
<!--  </form>-->


    <b-button class="space" type="submit" >Submit Payment</b-button>
  </form>
</template>

<script>
  import registerElements from './stripeMethods'
  // Create a Stripe client.
  let stripe = Stripe('pk_test_TYooMQauvdEDq54NiTphI7jx');

  // Create an instance of Elements.
  let elements = stripe.elements();

  // Custom styling can be passed to options when creating an Element.
  // (Note that this demo uses a wider set of styles than the guide below.)
  let style = {
    base: {
      color: '#32325d',
      fontFamily: '"Roboto", Helvetica, sans-serif',
      fontSmoothing: 'antialiased',
      fontSize: '16px',

    },
    invalid: {
      color: '#fa755a',
      iconColor: '#fa755a'
    }
  };

  let card = undefined;
import Vue from 'vue';
import axios from 'axios';
import authService from '../../services/authService';
  export default {
    props: ['plan'],
    data: function() {
      return {
        successful: false,
        monthly: {
          id: 'prod_Flp17jVPzNUfFz',
          price: 25
        },
        annual: {
          id: 'prod_Flp17jVPzNUfFz',
          price: 215 
        }
      }
    },
    methods: {
      submitPayment: function () {

      }
    },
    mounted() {
      // Create an instance of the card Element.
      let card = elements.create('card', {style: style});

      // Add an instance of the card Element into the `card-element` <div>.
      card.mount('#card-element');

      // Handle real-time validation errors from the card Element.
      card.addEventListener('change', function (event) {
        let displayError = document.getElementById('card-errors');
        if (event.error) {
          displayError.textContent = event.error.message;
        } else {
          displayError.textContent = '';
        }
      });

      // Handle form submission.
      let form = document.getElementById('payment-form');
      form.addEventListener('submit', function (event) {
        console.log(event);
        event.preventDefault();

        stripe.createToken(card).then(function (result) {
          if (result.error) {
            // Inform the user if there was an error.
            let errorElement = document.getElementById('card-errors');
            errorElement.textContent = result.error.message;
          } else {
            // Send the token to your server.
            stripeTokenHandler(result.token);
            return result.token
          }
        }).then(function (result) {
          console.log(result);
          axios({
            method: "POST",
            url: '/api/checkout',
            headers: {
              Authorization: `Bearer ${authService.idToken}`,
            },
            data: {
              subscription: result.id,
              plan: this.plan     <----------------------------------- not working
            },
          }).then(function (res) {
            // alert("It went through! How? ")
          }).catch(function (err) {
            console.log(err)
          });
        });
      });

      // Submit the form with the token ID.
      function stripeTokenHandler(token) {
        // Insert the token ID into the form so it gets submitted to the server
        let form = document.getElementById('payment-form');
        let hiddenInput = document.createElement('input');
        hiddenInput.setAttribute('type', 'hidden');
        hiddenInput.setAttribute('name', 'stripeToken');
        hiddenInput.setAttribute('value', token.id);
        form.appendChild(hiddenInput);
      }
    }
  }
</script>

Answer 1

这是一个作用域问题，仅此而已。当您尝试访问 this.plan 时，this 是对从事件监听器执行的回调的引用。您需要声明一个分配给 Vue 实例的变量，以便在方法中的任何位置访问这些字段:

mounted() {
  var vm = this;
  // Create an instance of the card Element.
  let card = elements.create('card', {style: style});

  // Add an instance of the card Element into the `card-element` <div>.
  card.mount('#card-element');

  // Handle real-time validation errors from the card Element.
  card.addEventListener('change', function (event) {
    let displayError = document.getElementById('card-errors');
    if (event.error) {
      displayError.textContent = event.error.message;
    } else {
      displayError.textContent = '';
    }
  });

  // Handle form submission.
  let form = document.getElementById('payment-form');
  form.addEventListener('submit', function (event) {
    console.log(event);
    event.preventDefault();

    stripe.createToken(card).then(function (result) {
      if (result.error) {
        // Inform the user if there was an error.
        let errorElement = document.getElementById('card-errors');
        errorElement.textContent = result.error.message;
      } else {
        // Send the token to your server.
        stripeTokenHandler(result.token);
        return result.token
      }
    }).then(function (result) {
      console.log(result);
      axios({
        method: "POST",
        url: '/api/checkout',
        headers: {
          Authorization: `Bearer ${authService.idToken}`,
        },
        data: {
          subscription: result.id,
          plan: vm.plan     <----------------------------------- not working
        },
      }).then(function (res) {
        // alert("It went through! How? ")
      }).catch(function (err) {
        console.log(err)
      });
    });
  });