添加一个 register.html 页面
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title>
</head>
<body>
<form><p>用户名<input id="username" type="text" name="username" onblur="func1(this)" /><span id="error"></span></p><p>密码<input type="text" name="pwd" /></p><input type="submit" value="submit">
</form><script>function func1(self) {var username=self.value;var xmlhttp=createXMLHttpRequest();xmlhttp.open("POST","/ajax_register/",true);xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");xmlhttp.send("username="+username);xmlhttp.onreadystatechange=function () {if(xmlhttp.readyState===4 && xmlhttp.status===200){var s=xmlhttp.responseTextif (s=="1"){document.getElementById("error").innerHTML="用户名已经注册!"}}}}function createXMLHttpRequest() {var xmlHttp;try{xmlHttp = new XMLHttpRequest();} catch (e) {try {// 适用于IE6xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");}catch (e) {try {// 适用于IE5.5，以及IE更早版本xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");}catch (e) {}}}return xmlHttp;}</script></body></html>修改 views.py
from django.http import HttpResponse
from django.shortcuts import render# Create your views here.def ajax_register(request):if request.method=="POST":username=request.POST.get("username")if username=="klvchen":return HttpResponse("1")return HttpResponse("0")return render(request,"register.html")修改 urls.py
from django.contrib import admin
from django.urls import path
from app01 import viewsurlpatterns = [path('admin/', admin.site.urls),path('ajax_register/', views.ajax_register),
