jquery - Uncaught ReferenceError : $ is not defined after applying Bootstrap Template

Question

我正在做一个 MVC 项目。我下载了一个名为 argon 的 Bootstrap 主题并尝试与 MVC 集成。我在 Bundle.Config 中引用了所有与 Argon 相关的 css 和 javascript 文件。 我认为它已成功集成，并且我现在可以使用所有 argon html 元素。 问题是我无法正确使用 jquery 函数。我在所有其他插件的顶部添加了 jquery 引用。但总是得到这个错误 - “ Uncaught ReferenceError :$ 未定义”。 我搜索了一下，我知道这是一个很常见的问题，但没有找到合适的解决方案。 不确定我在哪里犯了错误。

Any suggestion would be helpful. TIA.


This is what I have tried - 

Bundle Config File :

            bundles.Add(new ScriptBundle("~/bundles/jquery").Include(
                        "~/Scripts/jquery-{version}.js",
                        "~/Argon/assets/vendor/jquery/jquery.min.js",
                        "~/Argon/assets/js/argon.min.js",
                        "~/Argon/assets/vendor/popper/popper.min.js",
                        "~/Argon/assets/vendor/bootstrap/bootstrap.min.js",
                        "~/Argon/assets/vendor/headroom/headroom.min.js",
                        "~/Argon/assets/vendor/onscreen/onscreen.min.js",
                        "~/Argon/assets/vendor/nouislider/js/nouislider.min.js",
                        "~/Argon/assets/vendor/bootstrap-datepicker/js/bootstrap-datepicker.min.js"
                        ));

            bundles.Add(new ScriptBundle("~/bundles/jqueryval").Include(
                        "~/Scripts/jquery.validate*"));

            // Use the development version of Modernizr to develop with and learn from. Then, when you're
            // ready for production, use the build tool at https://modernizr.com to pick only the tests you need.
            bundles.Add(new ScriptBundle("~/bundles/modernizr").Include(
                        "~/Scripts/modernizr-*"));

            bundles.Add(new ScriptBundle("~/bundles/bootstrap").Include(
                      "~/argon/assets/vendor/bootstrap/bootstrap.js",
                      "~/argon/assets/vendor/bootstrap/bootstrap.min.js"));

            bundles.Add(new StyleBundle("~/Content/css").Include(
                      "~/Content/bootstrap.css",
                      "~/Content/site.css"));

            bundles.Add(new StyleBundle("~/Content/argon").Include(
                "~/Argon/assets/css/argon.min.css",
                "~/Argon/assets/css/bootstrap/bootstrap-grid.min.css",
                "~/Argon/assets/css/bootstrap/bootstrap-reboot.min.css",
                "~/Argon/assets/vendor/bootstrap-datepicker/css/bootstrap-datepicker.min.css",
                "~/Argon/assets/vendor/font-awesome/css/font-awesome.min.css",
                "~/Argon/assets/vendor/nouislider/css/nouislider.min.css",
                "~/Argon/assets/vendor/nucleo/css/nucleo-svg.css",
                "~/Argon/assets/vendor/nucleo/css/nucleo.css"
                ));



THE LAYOUT PAGE:


    @Styles.Render("~/Content/css")
    @Styles.Render("~/Content/argon")
    @Scripts.Render("~/bundles/modernizr")

    <div class="container body-content">
        @RenderBody()
        <hr />
        <footer>
            <p>&copy; @DateTime.Now.Year - My ASP.NET Application</p>
        </footer>
    </div>

    @Scripts.Render("~/bundles/jquery")
    @*@Scripts.Render("~/bundles/bootstrap")*@
    @RenderSection("scripts", required: false)
</body>
</html>



THE INDEX PAGE:

@{
    ViewBag.Title = "Home Page";
}


<div>
    <div class="form-group">
        <div class="input-group input-group-alternative">
            <div class="input-group-prepend">
                <span class="input-group-text"><i class="ni ni-calendar-grid-58"></i></span>
            </div>
            <input class="form-control datepicker" id="dtTime" placeholder="Select date" type="text"/> 
            <button type="button" id="btnDate" class="btn btn-outline-default">Default</button>
        </div>
    </div>


</div>


<script type="text/javascript">
    $(document).ready(function () {
        $("#btnDate").on('click', function (e) {
           var dtval = $('.datepicker').val();
           console.log(dtval);
        });

    });

</script>

Answer 1

我不需要掌声，但要补充:

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

在你的 <script> 之前标签或 <head></head>