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<!doctype html><html lang="en"><head><meta charset="UTF-8"><title>JS基础{数组,增删改}</title></head><body><script>//数组定义 1var arr1 = new Array('a','b','c','d');// console.log(arr1);//数组定义 2var arr2 = ['e','f','g'];// console.log(arr2);//push()给数组尾添加元素var arr3 = ['a','b','c'];arr3.push('d');// console.log(arr3);//pop()删除数组最后一个元素var arr4= ['a','c','e','f'];arr4.pop();// console.log(arr4);//unshift()给数组开头添加元素var arr5=['z','x','c','v'];arr5.unshift('q','a');// console.log(arr5);//shift()删除数组开头元素var arr6=['a','s','d','f','g','h'];arr6.shift();arr6.shift();// console.log(arr6);//slice()在数组内选定元素 返回var arr7=['q','w','e','r','t','s','a','t'];var res1 = arr7.slice(0,3);// console.log(res1);//concat()多个数组进行连接var res2 = arr1.concat(arr2.concat(arr3));// console.log(res2);//indexOf 返回指定数组的下标var res3 = arr7.indexOf('t');// console.log(res3);//Array.isArray()判断对象是否为数组var no = '666666666aaa6sd6a]d4sa';var res4 = Array.isArray(no);// console.log(res4);//join():把数组转化为字符串var arr8 = ['a','c','d','b'];var res5 = arr8.join('---');// console.log(res5);//includes()判断数组是否包含指定值var res6 = arr8.includes('q');console.log(res6);</script></body></html>
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>JS DOM事件</title></head><body><button onclick="d()">单击我</button><button ondblclick="s()">双击我</button><button onmouseover="y()">移到我</button><button onmouseout="l()">离开我</button><input type="text" onblur="j()" placeholder="请输入！"><script>//onclick()当用户单击该元素调用的事件function d() {alert('被单击我就出来了');}//ondblclick()当用户双击该元素调用的事件function s() {alert('被双击我就出来了');}//onmouseover()鼠标移到该元素function y() {console.log('碰到我了！')}//onmouseout()鼠标离开某元素function l() {console.log('离开我了！！！')}//onblur()失去该元素焦点function j() {alert('离开输入框')}</script></body></html>
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