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  • 省市联动

    省市联动
    
    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
    <select name="" id="s1"></select>
    <select name="" id="s2"></select>
    <script>
    
        let s1Ele = document.getElementById('s1');
        let s2Ele = document.getElementById('s2');
        let data = {"河北省": ["廊坊", "邯郸"], "北京": ["朝阳区", "海淀区"], "山东": ["威海市", "烟台市"]};
        for (let pro in data){
            let  opEle = document.createElement('option');
            opEle.innerText = pro;
            s1Ele.appendChild(opEle)
        }
    
        s1Ele.onchange = function () {
            s2Ele.innerHTML= '';
            let choice_pro = s1Ele.value;
            let city_list = data[choice_pro];
            for (let i=0;i<city_list.length;i++){
                let cityEle = document.createElement('option');
                cityEle.innerText = city_list[i];
                s2Ele.appendChild(cityEle)
            }
        }
    
    
    </script>
    
    </body>
    </html>
    
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  • 原文地址:https://www.cnblogs.com/ruhai/p/10970228.html
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