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js

e 1 year ago
parent
974341e2fc
commit
4a5ab7cd99
4 changed files with 74 additions and 5 deletions
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  1. 1 5
      JS初级/JS基础/16.数组的方法.html
  2. 22 0
      JS初级/JS基础/17.Date对象.html
  3. 24 0
      JS初级/JS基础/18.类型.html
  4. 27 0
      JS初级/JS基础/19_1.字符串的方法.html

+ 1 - 5
JS初级/JS基础/16.数组的方法.html
View File 

@@ -50,18 +50,14 @@
 
       list2 += '';
 
       //  list2 = list2 + '';
 
       console.log(list2)
 
-      //12.sort() 按照ASCII编码排序
 
+      //12.sort() 按照Unicode编码排序
 
       //var num = ['rte',12,"a",32,1,91,"d"];
 
       //console.log(num.sort());
 
-       
       var newList = [23,5,986,4,32,123,78,10];
 
-
 
       newList.sort(function(a,b){
 
         return b-a;
 
       });
 
       console.log(newList.reverse());
 
-
 
-
 
     </script>
 
   </body>
 
 </html>

+ 22 - 0
JS初级/JS基础/17.Date对象.html
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@@ -0,0 +1,22 @@
 
+<!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>
 
+        var date = new Date();
 
+        console.log(date.getFullYear(),'当前年份');
 
+        console.log(date.getMonth() + 1,'当前月份');//取值范围0~1
 
+        console.log(date.getDate(),'当前日期');
 
+        console.log(date.getHours(),'当前小时');
 
+        console.log(date.getMinutes(),'当前分钟');
 
+        console.log(date.getSeconds(),'当前秒数');
 
+        console.log(date.getMilliseconds(),'当前毫秒');
 
+        console.log(date.getDay(),'当前星期');
 
+        console.log(date.getTime(),'获取当前时间的时间戳');
 
+    </script>
 
+</body>
 
+</html>

+ 24 - 0
JS初级/JS基础/18.类型.html
View File 

@@ -0,0 +1,24 @@
 
+<!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>
 
+        var arr = new Array();
 
+        var obj = new Object();
 
+        var date = new Date();
 
+        var num = new Number();
 
+        var str = new String();
 
+        var aaa = new Boolean()
 
+        console.log(aaa);
 
+        var b = 3.1415926;
 
+        //parseInt（） 整数
 
+        // parseFloat() 浮点数
 
+        console.log(parseInt(b));
 
+        console.log(parseFloat(b));
 
+    </script>
 
+</body>
 
+</html>

+ 27 - 0
JS初级/JS基础/19_1.字符串的方法.html
View File 

@@ -0,0 +1,27 @@
 
+<!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>
 
+        var str = 'Happy New Year';
 
+        // 1.toUpperCase() 将字符串中所有字母转成大写
 
+        var str1 = str.toUpperCase();
 
+        console.log(str1);
 
+        // 2.toLowerCase() 将字符串中所有字母转成小写
 
+        var str2 = str1.toLowerCase();
 
+        console.log(str2);
 
+        // 3.concat() 将字符串连接在一起
 
+        var str3 = str1.concat(str2);
 
+        console.log(str3);
 
+        // 4.trim() 消除字符串前后的空格
 
+        var newStr = '  hello,wor ld  ';
 
+        var news = newStr.trim();
 
+        console.log(newStr);
 
+        console.log(news);
 
+    </script>
 
+</body>
 
+</html>