array-homework1

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
    </head>
    <body>
        <!-- 输入车牌判断是否车辆限行 -->
        <div id="box1">
            <input type="" name="" id="carNo" value="" placeholder="请输入车牌号"/>
            <button onclick="queryAction()">查询</button>
            <button onclick="clearAction()">清除</button>
        </div>
        
        <div id="box2">
            
        </div>
        <script>
            let carNo= document.querySelector('#carNo')
            
            
            function isTrafficControl(carNo){
                // 获取星期几,周六、周日不限行
                tody = new Date()
                week = tody.getDay()
                if(week == 0 || week == 6){
                    return false
                }
                
                //1.找到第一个数字字符
                numer = ''
                for(x=carNo.length-1;x>=0;x--){
                    ch = carNo[x]
                    if('0'<=ch && ch<='9'){
                        numer = ch
                        break
                    }
                }
                console.log('====：',numer)
                // week = 5
                
                //2.日期对应的车牌号是否限行(星期数或星期数+5 == 尾号)
                if(numer == week || numer==(week+5)%10){
                    return true
                }
                return false
            }
            function queryAction(){
                // 获取输入文本的内容
                // inputNode = document.getElementById('carNo')
                carNumer = carNo.value
                console.log(carNumer)
                
                result = ''
                // 正则判断车牌是否符合规则
                //第一位: 京津沪渝辽吉黑冀鲁豫晋陕甘闽粤桂川云贵苏浙皖湘鄂赣青新宁蒙藏琼
                //第二位：A-Z
                //后面：五位（数字和字母结合)
                regular = /^[京津沪渝辽吉黑冀鲁豫晋陕甘闽粤桂川云贵苏浙皖湘鄂赣青新宁蒙藏琼][A-Z][\dA-Z]{5}$/
                if(regular.test(carNumer) == false){
                    result = carNumer + ':不是正确车牌，请清除重新输入！'
                }else{
                    if(isTrafficControl(carNumer)){
                        result = carNumer + ':今日限行！'
                    }else{
                        result = carNumer + ':今日不限行！'
                    }
                }
                
                // 显示在页面
                pNode = document.createElement('p')
                pNode.innerText = result
                document.getElementById('box2').appendChild(pNode)
            }
            function clearAction(){
                // let carNo= document.querySelector('#carNo')
                carNo.value = ''
                document.getElementById('box2').innerHTML = ''
                
            }
        </script>
    </body>
</html>
array-homework1

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