面向?qū)ο?繼承

(1)獲取地址欄參數(shù)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>獲取地址欄參數(shù)</title>
    <script type="text/javascript">
        window.onload = function(){
            //url?aa=tom#12
            var data = window.location.search;//?aa=tom
            var hash = window.location.hash;//#12
            alert(hash);//#12
            var oSpan = document.getElementById('span01');
            // alert(data);//?aa=tom
            var arr = data.split('=');
            // alert(arr);//?aa,tom
            var name = arr[1];
            oSpan.innerHTML = name;
        }
    </script>
</head>
<body>
    <div>歡迎<span id="span01"></span>訪問我的主頁</div>
</body>
</html>

(2)Math

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Math</title>
    <script type="text/javascript">
        // var num = Math.random();
        // alert(num);//彈出0-1之間的隨機(jī)數(shù)
        var a = 10;
        var b = 20;
        // var num = Math.random()*(b-a)+a;
        // alert(num);//彈出10-20之間的隨機(jī)數(shù)
        var arr = [];
        for(var i=0; i<20; i++){
            // var num = Math.floor(Math.random()*(b-a)+a);//向下取整,10-19
            var num = Math.floor(Math.random()*(b-a + 1)+a);//向下取整,10-20
            
            arr.push(num);//生成一個(gè)數(shù)就放進(jìn)數(shù)組
        }
        alert(arr);//17,20,20,11,11,19,17,16,10,11,16,11,18,13,13,11,17,14,19,19
    </script>
</head>
<body>
    
</body>
</html>

(3)單體創(chuàng)建對象

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>單體創(chuàng)建對象</title>
    <script type="text/javascript">
        var Tom = {
            // 屬性
            name:'tom',
            age:18,
            // 方法
            showName:function(){
                alert(this.name);
            },
            showAge:function(){
                alert(this.age);
            }
        }
        //調(diào)用屬性
        alert(Tom.name);
        alert(Tom.age);
        
        //調(diào)用方法
        Tom.showName();
    </script>
</head>
<body>
    
</body>
</html>

(4)構(gòu)造函數(shù)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>構(gòu)造函數(shù)</title>
    <script type="text/javascript">
        function Person(name,age,job){
            this.name = name;
            this.age = age;
            this.job = job;
            this.showName = function(){
                alert(this.name);
            }
            this.showAge = function(){
                alert(this.age);
            }
            this.showJob = function(){
                alert(this.job);
            }
        }
        //new的作用就相當(dāng)于工廠模式中最開始創(chuàng)建了一個(gè)空對象,最后把對象返回
        var Bob = new Person('bob',18,'產(chǎn)品汪');
        Bob.showJob();
        var Alex = new Person('alex',19,'運(yùn)營喵');
        Alex.showJob();
        alert(Bob.showName == Alex.showName);//false
    </script>
</head>
<body>
    
</body>
</html>

(5)工廠模式創(chuàng)建對象

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>工廠模式創(chuàng)建對象</title>
    <script type="text/javascript">
        function Person(name,age,job){
            //創(chuàng)建一個(gè)空對象
            // var o = new Object();//方式一
            var o = {};//方式二
            o.name = name;
            o.age = age;
            o.job = job;
            o.showName = function(){
                alert(this.name);
            }
            o.showAge = function(){
                alert(this.age);
            }
            o.showJob = function(){
                alert(this.job);
            }
            return o;
        }
        var Tom = Person('tom',18,'程序猿');
        Tom.showJob();
        var Jack = Person('jack',19,'攻城獅');
        Jack.showJob();
    </script>
</head>
<body>
    
</body>
</html>

(6)原型模式

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>原型模式</title>
    <script type="text/javascript">
        function Person(name,age,job){
            this.name = name;
            this.age = age;
            this.job = job;
            Person.prototype.showName = function(){
                alert(this.name);
            }
            Person.prototype.showAge = function(){
                alert(this.age);
            }
            Person.prototype.showJob = function(){
                alert(this.job);
            }
        }
        //先去自己的對象中找showName函數(shù),再去構(gòu)造函數(shù)的原型找
        var Lucy = new Person('lucy',18,'測試鼠');
        //重寫自身對象中的方法,不會影響其它對象
        Lucy.showName = function(){
            alert('我的名字是' + this.name);
        }
        Lucy.showName();//我的名字是lucy
        var Lily = new Person('lily',19,'市場雞');
        Lily.showName();//lily
        alert(Lucy.showName == Lily.showName);//false
    </script>
</head>
<body>
    
</body>
</html>

(7)call和apply

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>call和apply</title>
    <script type="text/javascript">
        /*
        call和apply的區(qū)別
        二者都可以改變當(dāng)前的this,區(qū)別在于apply方法要將參數(shù)放入數(shù)組中再傳參
        */
        function aa(a,b){
            alert('我的this是' + this + ',我的a是' + a + ',我的b是' + b);
        }
        //我的this是[object Window],我的a是2,我的b是3
        // aa(2,3);
        //我的this是abc,我的a是2,我的b是3
        // aa.call('abc',2,3);
        //我的this是abc,我的a是2,我的b是3
        aa.apply('abc', [2,3]);
    </script>
</head>
<body>
    
</body>
</html>

(8)函數(shù)的繼承

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>函數(shù)的繼承</title>
    <script type="text/javascript">
        //父類
        function Fclass(name, age){
            this.name = name;
            this.age = age;
        }
        Fclass.prototype.showName = function(){
            alert(this.name);
        }
        Fclass.prototype.showAge = function(){
            alert(this.age);
        }
        //子類
        function Sclass(name, age, job){
            //屬性用call或者apply的方式來繼承
            Fclass.call(this, name, age);
            this.job = job;
        }
        //方法繼承:將父類的一個(gè)實(shí)例賦值給子類的原型屬性
        Sclass.prototype = new Fclass();
        Sclass.prototype.showJob = function(){
            alert(this.job);
        }
        //由于已經(jīng)繼承了父類的屬性和方法,所以可以直接調(diào)用
        var Driver = new Sclass('tom',18,'老司機(jī)');
        Driver.showName();
        Driver.showAge();
        Driver.showJob();
    </script>
</head>
<body>
    
</body>
</html>

(9)新增選擇器

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>新增選擇器</title>
    <script type="text/javascript">
        window.onload = function(){
            var oDiv = document.querySelector('#div1');
            alert(oDiv);//彈出[object HTMLDivElement],表示選擇了該Div
            //如果要選擇多個(gè)元素用querySelectorAll
            var aLi = document.querySelectorAll('.list li');
            alert(aLi.length);//8
        }
    </script>
</head>
<body>
    <div id="div1">這是一個(gè)div元素</div>
    <ul class="list">
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
        <li>6</li>
        <li>7</li>
        <li>8</li>
    </ul>
</body>
</html>
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