FOSSDB/templates/fossdb/create_view.html

{% extends "layout.html" %}
{% load static %}
{% block title %}{{ title }}{% endblock %}
{% block meta %}{% endblock %}
{% block content %}
    <form method="post" id="project-form">
        {% csrf_token %}
        {{ form.as_p }}
        {{ hosting_platform.management_form }}
        {{ hosting_platform.as_table }}
        <div id="language-formset">
            {{ programming_language.management_form }}
            {% for form in programming_language %}<div class="language-form">{{ form.as_table }}</div>{% endfor %}
        </div>
        <!-- This button will trigger the JS to append another language form -->
        <button type="button" id="add-more">+</button>
        <!-- Render the empty form, which you'll use as a template for new entries -->
        <!-- Wrap it in a container so you can reference it by id and hide it -->
        <div id="empty-form" style="display:none;">{{ empty_form.as_table }}</div>
        <button type="submit">Submit</button>
    </form>
    <script>
        document.querySelector("#add-more").addEventListener("click", function() {
            var formIndex = document.querySelector("#id_language-TOTAL_FORMS").value;
            var emptyFormDiv = document.querySelector("#empty-form");
            var newFormHTML = emptyFormDiv.innerHTML.replace(/__prefix__/g, formIndex);
            var newFormDiv = document.createElement("div");
            newFormDiv.className = "language-form";
            newFormDiv.innerHTML = newFormHTML;
            document.querySelector("#language-formset").append(newFormDiv);
            document.querySelector("#id_language-TOTAL_FORMS").value = parseInt(formIndex) + 1;
        });
    </script>
{% endblock %}