How to change the data before submitting the form?

Question

Vue.js

Good afternoon.
I'm making a button for payment from Yandex money. https://yandex.ru/dev/money/doc/payment-buttons/re... The
question was how to generate a transaction id. I want to request an id on the server before submitting the form and then send it ... v-on:submit.prevent intercepts .. I'll get the id. How to send next?

Answer 1

Decided like this:

<button v-on:click.prevent="submitHandler" >Отправить</button>

  methods: {
    submitHandler(event){
      this.id= '34534555'
      this.$nextTick(() => {
        this.$refs.form.submit()
      })
    }
  },