JavaScript Date对象为连字符和非连字符的日期字符串生成不同的值

Question

带有和不带有连字符（from crispy_forms.helper import FormHelper from crispy_forms.layout import Submit class SignUpForm(forms.Form): Username=forms.CharField(required=True) Password=forms.CharField(widget=forms.PasswordInput,required=True) Confirm_Password=forms.CharField(widget=forms.PasswordInput,required=True) def __init__(self,*args,**kwargs): super(SignUpForm,self).__init__(*args) self.helper=FormHelper() self.helper.method='POST' self.helper.add_input(Submit('gobtn','Login',css_class='btn-success')) def clean(self): cleaned_data = super(SignUpForm, self).clean() password = cleaned_data.get('Password') password_confirm = cleaned_data.get('Confirm_password') if password != password_confirm: raise forms.ValidationError("The two password fields must match.") return cleaned_data ）的javascript日期看起来都不同。

def myview(request):
    #your logic here
    context={}
    if request.method == "GET":
        context['form']= SignUpForm()
    else:
        #POST request block
        if SignUpForm(request.POST).is_valid():
           #do what you like here
        else:
           #if form is invalid  
           context['form']= SignUpForm(request.POST) # this will render if validation errors so you can remove your if errors block in html

    render(request,'template_name.html',context)

您能解释一下这种行为吗？