Mutilpe JS文件包含在另一个js文件中有时不起作用

我发现了如何将多个js文件包含在另一个js文件中，但我面临的一个问题是此功能有时会加载，有时不会加载，因此有时请求直接进入服务器进行服务器端验证而不执行客户端验证。

请帮助我解决此问题。

$.when(
        $.getScript('../../public/js/jquery.validate.min.js'),
        $.getScript('../../public/js/additional-methods.min.js'),
        $.Deferred(function(deferred) {
            $(deferred.resolve);
        })
        ).done(function() {
    $(function() {
        $("#login").validate({
            errorClass: "state-error",
            validClass: "state-success",
            errorElement: "em",
            rules: {
                email: {
                    required: true,
                    email: true,
                    minlength: 6,
                    maxlength: 50
                },
                password: {
                    required: true,
                    minlength: 6
                }
            },
            messages: {
                email: {
                    required: 'Enter your Email ID',
                    email: 'Enter a VALID Email ID',
                    minlength: 'Enter a VALID Email ID',
                    maxlength: 'Email ID can not be more than 50 characters'
                },
                password: {
                    required: 'Enter your Password',
                    minlength: 'Password must be minimum of 6 characters'
                }
            },
            highlight: function(element, errorClass, validClass) {
                $(element).closest('.field').addClass(errorClass).removeClass(validClass);
            },
            unhighlight: function(element, errorClass, validClass) {
                $(element).closest('.field').removeClass(errorClass).addClass(validClass);
            },
            errorPlacement: function(error, element) {
                error.insertAfter(element.parent());
            }
        });
    });
});