摘要:
一、对象,this指向,面向对象(工具) var obj = { }; var obj2 = new Object( ); function Foo(){} var obj3 = new Foo() var obj = { }; var obj2 = new Object( ); function 阅读全文
摘要:
一、设置 name = value; path = 路径; expires = new Date(); var d = new Date(); d.setDate(30) document.cookie = "password = tp;path = /;expires = "+d var d2 = 阅读全文
摘要:
1、ES5的循环更新 forEach indexOf map filter reduce some every forEach indexOf map filter reduce some every var fgoods = [1,2,3,4,5,6,7,8]; for (var i = 0; i 阅读全文
摘要:
this指向改变 因为js 的特性,导致很多this指向并不如人意,js给我们提供了很多this指向改变的方法; this指向的改变我们一般都应用在面向对象的编程中 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <met 阅读全文
摘要:
1、变量和常量 let const let hello = "hello world"; let hello = "hello world"; let hello = "hello world"; 特点:1.1 没有声明提升了 1.2 块级作用域; (大括号作用域) 1.3 TDZ 暂时性死区 在变 阅读全文