jsonp实现下拉搜索 

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <script type="text/javascript">
            //curl "https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su?wd=bbb&cb=
            //curl "https://suggest.taobao.com/sug?code=utf-8&q=aaa&callback=
            window.onload = function(){
                var oTxt = document.getElementById("txt");
                var oBtn = document.getElementById("btn");
                oTxt.onkeyup = function(){
                    var sc = document.createElement("script");
                    //sc.src = "https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su?wd=" + oTxt.value + "&cb=fn";
                    sc.src = "https://suggest.taobao.com/sug?code=utf-8&q="+oTxt.value + "&callback=fn";
                    document.getElementsByTagName("head")[0].appendChild(sc);
                }
            }
            //全局函数
            function fn(str){
                //console.log(str.s);
                var oUl = document.getElementById("ul1");
                oUl.innerHTML = "";
                for(var i = 0; i < str.result.length; i ++){
                    var li = document.createElement("li");
                    li.innerHTML = str.result[i];
                    oUl.appendChild(li);
                }
            }
        </script>
        
    </head>
    <body>
        <input type="text" name="txt" id="txt" value="" />
        <input type="button" name="btn" id="btn" value="搜索" />
        <ul id="ul1">
            
        </ul>
    </body>
</html>

 

（本例调用淘宝搜索接口）效果如下

 

 

 

引用的搜索接口不一样，则所需要的内容在str中的位置不一样，故截取名称不同。如下，调用百度搜索接口

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <input type="text" name="" id="">
    <ul></ul>
</head>
<body>
<script>
var oBtn = document.getElementsByTagName('input')[0];
oBtn.onkeyup = function() {
    var st = document.createElement('script');
    st.src = "https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su?wd=" + oBtn.value + "&cb=fnn";
    document.getElementsByTagName('head')[0].appendChild(st);
}
function fnn(str) {
    console.log(str);
    var oUl = document.getElementsByTagName('ul')[0];
    oUl.innerHTML = "";
    for (var i = 0; i < str.s.length; i++) {
        var oLi = document.createElement("li");
        oLi.innerHTML = str.s[i];
        oUl.appendChild(oLi);
    }
}
</script>
</body>
</html>

效果如下

 

posted @ 2017-08-12 18:09  LLLLily  阅读(234)  评论(0)  编辑  收藏  举报