1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="UTF-8"> 5 <title>内置对象</title> 6 <script> 7 //5.Date 8 //1)如何创建Date 9 var d1 = new Date(); 10 var d2 = new Date("2017/09/01 09:09:09"); 11 console.log(d1); 12 console.log(d2); 13 //2)转换为本地格式的字符串 14 console.log(d1.toLocaleDateString()); 15 console.log(d1.toLocaleTimeString()); 16 //3)读取时间分量 17 var y = d1.getFullYear(); 18 //月份从0开始 19 var m = d1.getMonth()+1; 20 var d = d1.getDate(); 21 var today = y + "年" + m + "月" + d + "日"; 22 console.log(today); 23 24 //6.RegExp 25 var str = "You can you up,no can no bb."; 26 //1)如何创建正则对象 27 var reg = /no/; 28 //2)test() 29 //检测字符串中是否包含与正则匹配的子串 30 console.log(reg.test(str)); 31 //3)exec() 32 //普通模式下 33 //从字符串中检测出与正则匹配的第1个子串 34 console.log(reg.exec(str)); 35 console.log(reg.exec(str)); 36 //全局模式下 37 //第1次调用,则从字符串中检测出与正则匹配的第1个子串 38 //第n次调用,则从字符串中检测出与正则匹配的第n个子串 39 reg = /no/g; 40 console.log(reg.exec(str)); 41 console.log(reg.exec(str)); 42 console.log(reg.exec(str)); 43 console.log(reg.exec(str)); 44 45 //7.Function 46 function sum() { 47 var s = 0; 48 if(arguments.length) { 49 for(var i=0;i<arguments.length;i++) { 50 s += arguments[i]; 51 } 52 } 53 return s; 54 } 55 56 //页面加载时立刻调用函数 57 console.log(sum(1,2)); 58 console.log(sum(3,4,5,6)); 59 60 </script> 61 </head> 62 <body> 63 64 </body> 65 </html>