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fengchuanyu 10 months ago
parent
877e3a64b9
commit
3b48cb3381
5 changed files with 123 additions and 3 deletions
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  1. 1 1
      3_js基础/1_helloworld.html
  2. 3 2
      3_js基础/7_页面交互方法.html
  3. 44 0
      3_js基础/8_内置方法.html
  4. 42 0
      3_js基础/9_数组内置方法.html
  5. 33 0
      3_js基础/练习1_数字炸弹.html

+ 1 - 1
3_js基础/1_helloworld.html
View File 

@@ -8,7 +8,7 @@
 
 <body>
 
     JavaScript
 
     <script>
 
-      document.write("hello world!");  
+    //   document.write("hello world!");  
     </script>
 
 </body>
 
 </html>

+ 3 - 2
3_js基础/7_页面交互方法.html
View File 

@@ -13,8 +13,9 @@
 
         // var boo = window.confirm("是否关闭");
 
         // console.log(boo);
 
 
-        var str = window.prompt("请输入数字");
 
-        console.log(str);
 
+        // 带输入框弹框返回输入的值
 
+        // var str = window.prompt("请输入数字");
 
+        // console.log(str);
 
     </script>
 
 </body>
 
 </html>

+ 44 - 0
3_js基础/8_内置方法.html
View File 

@@ -18,6 +18,50 @@
 
         // Math.random() 生成随机数字，0-1
 
         // var roundNum = Math.random();
 
         // console.log(roundNum);
 
+
 
+        // Math 对象方法
 
+        // var a = 3.56;
 
+        // var b = 3.014;
 
+        // console.log(Math.round(a));
 
+        // console.log(Math.ceil(b));
 
+        // console.log(Math.floor(a));
 
+        // console.log(Math.max(a,b));
 
+        // console.log(Math.min(a,b));
 
+
 
+        //String 对象防范
 
+        var str = "hello world";
 
+        var str1 = "a,b,c,d,e"
 
+        // console.log(str[1]);
 
+        // console.log(str.charAt(0));
 
+
 
+        // var str1 = str.slice(0,4);
 
+        // console.log(str1,str);
 
+
 
+        // var arr1 = str1.split(",");
 
+        // console.log(arr1) 
+
 
+        // var str2 = str.substr(1,1);
 
+        // console.log(str2);
 
+
 
+        // var str3 = str.substring(1,5);
 
+        // console.log(str3)
 
+
 
+        // var str4 = " hello "
 
+        // console.log(str4.trim(),str4);
 
+
 
+        // var num11 = 1;
 
+        // var num12 = 2;
 
+        // var str5 = num11.toString() + num12.toString();
 
+        // console.log(str5)
 
+
 
+        var str6 = "hello world";
 
+        // console.log(str6.includes("lle"));
 
+        // console.log(str6.indexOf("a"));
 
+
 
+        // console.log(str6.replace("e","1"));
 
+        // console.log(str6.replaceAll("l","1"));
 
+        console.log(str6.toUpperCase());
 
+        
     </script>
 
 </body>
 
 </html>

+ 42 - 0
3_js基础/9_数组内置方法.html
View File 

@@ -0,0 +1,42 @@
 
+<!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 = [1,2,3,4,5,6,7,8,9];
 
+        var arr1 = ["a","b","c","d"];
 
+
 
+        // console.log(arr.length)//length 方法返回数组长度
 
+        
+        // var arr2 = arr.concat(arr1);
 
+        // console.log(arr2);
 
+        // 向数组最后添加一个新值
 
+        // arr1.push("e");
 
+        // console.log(arr1);
 
+        // 向数组前方添加新值
 
+        // arr1.unshift("aa");
 
+        // console.log(arr1);
 
+        // 删除数组中最后一个值
 
+        // arr1.pop();
 
+        // console.log(arr1);
 
+        // 删除数组第一个值
 
+        // var num1 = arr1.shift();
 
+        //  console.log(arr1,num1);
 
+
 
+        //数组转字符串
 
+        // var str1 = arr1.join("-");
 
+        // var str1 = arr1.join("");
 
+        // console.log(str1);
 
+
 
+        //字符串转数组
 
+        // var str2 = "hello";
 
+        // var arr3 = str2.split("");
 
+        // console.log(arr3);
 
+
 
+    </script>
 
+</body>
 
+</html>

+ 33 - 0
3_js基础/练习1_数字炸弹.html
View File 

@@ -0,0 +1,33 @@
 
+<!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>
 
+        // 生成1-100的随机数字
 
+        var randomNum = parseInt(Math.random()*100+1);
 
+        // 定一个数字用来计算猜的次数
 
+        var guessCount = 0;
 
+        // 定一个无限循环 用来让用户输入猜的数字
 
+        while(true){
 
+            // 每次循环计算一下循环次数
 
+            guessCount++;
 
+            //让用户输入数字
 
+            var guessNum = window.prompt("请输入一个1-100的数字");
 
+            // 判断输入值的大小
 
+            if(guessNum > randomNum){
 
+                alert("你猜大了，重新试试");
 
+            }else if(guessNum < randomNum){
 
+                alert("你猜小了，重新试试");
 
+            }else{
 
+                // 如果猜对了输出猜的次数并且结束循环
 
+                alert("你猜对了,你一共猜了"+guessCount+"次");
 
+                break;
 
+            }
 
+        }
 
+    </script>
 
+</body>
 
+</html>