1 anno fa · f583e76820
--- a/day23/html/5.判读数据类型.html
+++ b/day23/html/5.判读数据类型.html
@@ -0,0 +1,11 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+    <meta charset="UTF-8">
			
 
				+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
			
 
				+    <title>Document</title>
			
 
				+</head>
			
 
				+<body>
			
 
				+    <script src="../js/5.判读数据类型.js"></script>
			
 
				+</body>
			
 
				+</html>
			
--- a/day23/html/6.hasOwnProperty.html
+++ b/day23/html/6.hasOwnProperty.html
@@ -0,0 +1,11 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+    <meta charset="UTF-8">
			
 
				+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
			
 
				+    <title>Document</title>
			
 
				+</head>
			
 
				+<body>
			
 
				+    <script src="../js/6.hasOwnProperty.js"></script>
			
 
				+</body>
			
 
				+</html>
			
--- a/day23/js/5.判读数据类型.js
+++ b/day23/js/5.判读数据类型.js
@@ -0,0 +1,20 @@
 
				+var a = '123';
			
 
				+console.log(typeof(a));
			
 
				+/**
			
 
				+ * 
			
 
				+    1.typeOf()
			
 
				+    2.instanceof:
			
 
				+    格式：A instanceof B 判断A是否是B的实例对象  true/false 由构造函数类型去判断数据类型
			
 
				+    3.Object.prototype.toString.call()
			
 
				+    4.constructor
			
 
				+ */
			
 
				+let arr = new Date();
			
 
				+let fn1 = () => {
			
 
				+    console.log("函數")
			
 
				+}
			
 
				+console.log(fn1 instanceof Function);
			
 
				+console.log(Object.prototype.toString.call(true))
			
 
				+let arr1 = [];
			
 
				+console.log(arr1.constructor == Object)
			
 
				+let num = '111'
			
 
				+console.log(num.constructor)
			
--- a/day23/js/6.hasOwnProperty.js
+++ b/day23/js/6.hasOwnProperty.js
@@ -0,0 +1,14 @@
 
				+// 创建一个构造函数
			
 
				+function myFn1() {
			
 
				+
			
 
				+}
			
 
				+myFn1.prototype.name = '这是我的名字';
			
 
				+
			
 
				+var a1 = new myFn1();
			
 
				+a1.age = 10;
			
 
				+// in作用:检查对象中是否含有某个属性值 如果含有返回true 若原型中有也返回true
			
 
				+console.log("age" in a1);
			
 
				+console.log("name" in a1);
			
 
				+// hasOwnProperty()作用:检查对象中是否含有某个属性值 如果本身含有返回true 不含有返回false;若对象本身不含有 原型含有也返回false
			
 
				+console.log(a1.hasOwnProperty("age"))
			
 
				+console.log(a1.hasOwnProperty("name"))