什么是关键词#

当你在搜索引擎中输出字符的时候，会有一个下拉框显示一些和关键词列表，用来提醒你想搜啥。

间接上代码

/** * 获取各大搜索引擎的关键字列表  *//** 获取随机小写字母 */function getRandomLetters(number) {    const alphabet = 'abcdefghijklmnopqrstuvwxyz';    let value = '';    for (let i = 0; i < number; i++) {        value = value + alphabet[Math.floor(Math.random() * alphabet.length)];    }    return value;}/** 获取百度关键词列表 */let dataMap = {};  //缓存列表function getBaiDuSug(searchValue){    return new Promise((r)=>{        if(dataMap[searchValue]){            r(dataMap[searchValue]);            return;        }        /** 创立一个惟一标识用于承受数据，避免数据对应不齐 */        let sign = `sug_sign_${getRandomLetters(3)}_${new Date().getTime()}`;        window[sign] = (data)=>{            setTimeout(()=>{sug.remove();},1000);  //删除元素            let list = data.s || [];            dataMap[searchValue] = list;            r(list);        }        let sug = document.createElement('script');        sug.src = `https://suggestion.baidu.com/su?wd=${encodeURIComponent(searchValue || '')}&cb=window.${sign}`;        document.getElementsByTagName('body')[0].appendChild(sug);    });}/** 获取bing关键词列表 */let dataMap_1 = {};  //缓存列表function getBingSug(searchValue){    return new Promise((r)=>{        if(dataMap_1[searchValue]){            r(dataMap_1[searchValue]);            return;        }        /** 创立一个惟一标识用于承受数据，避免数据对应不齐 */        let sign = `sug_sign_${getRandomLetters(3)}_${new Date().getTime()}`;        window[sign] = (data)=>{            setTimeout(()=>{sug.remove();},1000);  //删除元素            let list = [];            let list_1 = data.AS.Results || [];            list_1.forEach(item=>{                list.push(...item.Suggests.map(item_=>{                    return item_.Txt;                }));            });            dataMap_1[searchValue] = list;            r(list);        }        let sug = document.createElement('script');        sug.src = `https://api.bing.com/qsonhs.aspx?type=cb&q=${encodeURIComponent(searchValue || '')}&cb=window.${sign}`;        document.getElementsByTagName('body')[0].appendChild(sug);    });}/** 获取360关键词列表 */let dataMap_2 = {};  //缓存列表function get360Sug(searchValue){    return new Promise((r)=>{        if(dataMap_2[searchValue]){            r(dataMap_2[searchValue]);            return;        }        /** 创立一个惟一标识用于承受数据，避免数据对应不齐 */        let sign = `sug_sign_${getRandomLetters(3)}_${new Date().getTime()}`;        window[sign] = (data)=>{            setTimeout(()=>{sug.remove();},1000);  //删除元素            let list = [];            let list_1 = data.result || [];            list_1.forEach(item=>{                list.push(item.word || '');            });            dataMap_2[searchValue] = list;            r(list);        }        let sug = document.createElement('script');        sug.src = `https://sug.so.360.cn/suggest?encodein=utf-8&encodeout=utf-8&format=json&word=${encodeURIComponent(searchValue || '')}&callback=window.${sign}`;        document.getElementsByTagName('body')[0].appendChild(sug);    });}/** 获取淘宝关键词列表 */let dataMap_3 = {};  //缓存列表function getTaoBaoSug(searchValue){    return new Promise((r)=>{        if(dataMap_3[searchValue]){            r(dataMap_3[searchValue]);            return;        }        /** 创立一个惟一标识用于承受数据，避免数据对应不齐 */        let sign = `sug_sign_${getRandomLetters(3)}_${new Date().getTime()}`;        window[sign] = (data)=>{            setTimeout(()=>{sug.remove();},1000);  //删除元素            let list = [];            let list_1 = data.result || [];            list_1.forEach(item=>{                list.push(item[0] || '');            });            dataMap_3[searchValue] = list;            r(list);        }        let sug = document.createElement('script');        sug.src = `https://suggest.taobao.com/sug?code=utf-8&q=${encodeURIComponent(searchValue || '')}&callback=window.${sign}`;        document.getElementsByTagName('body')[0].appendChild(sug);    });}

不便当前间接复制应用，应用例子

getBingSug('苹果').then(e=>{    console.log(e);})

十分的好用哇，为什么要有个sign标识呢，因为屡次调用会存在一个问题，就是不晓得这次的列表是对应我输出的什么字符的，当初这个完满解决了这个问题。

原文