baclight/app/javascript/controllers/add_network_exception_controller.js

import { Controller } from "@hotwired/stimulus"

export default class extends Controller {
    static values = {
        parentColor: String
    }

    static targets = ["template", "container"]

    add(event) {
        console.log("start")
        event.preventDefault()
        event.stopPropagation()

        const content = this.#updateTemplateException()

        this.containerTarget.insertAdjacentHTML("beforeend", content)

    }

    #updateTemplateException() {
        const nextIndex = new Date().getTime()
        console.log("~~ " + this.parentColorValue)
        return this.templateTarget.innerHTML
                            .replace(/NEW_EXC_RECORD/g, nextIndex)
                            .replace(/PARENT_SECONDARY_COLOR/g, this.parentColorValue)


    }
}