gform-rest-api-action-fix.js

// get all instances of a form on the post
const matches = document.querySelectorAll(".gform_wrapper form")
// we are using vue.js here with the slug of the current post in state
const slug = store.state.currentPost.slug
// loop through each form on the post
matches.forEach(function(match) {
    // get the value of the id of the form
    let gformID = match.getAttribute("id")
    // get only the form number off the gravity form using regex
    let isolatedID = /([1-9][0-9]*)/.exec(gformID)
    // set the action of the current form using the slug and the current form id
    match.setAttribute("action", `/${slug}/#gf_${isolatedID[0]}`)
})