动态加载js

异步加载百度地图

export default {
    init: function (){
        const AK = "your key";
        const BMap_URL = "https://api.map.baidu.com/api?v=3.0&ak="+ AK +"&s=1&callback=onBMapCallback";
        return new Promise((resolve, reject) => {
            // 如果已加载直接返回
            if(typeof BMap !== "undefined") {
                resolve(BMap);
                return true;
            }
            // 百度地图异步加载回调处理
            window.onBMapCallback = function () {
                // console.log("百度地图脚本初始化成功...");
                resolve(BMap);
            };

            // 插入script脚本
            let scriptNode = document.createElement("script");
            scriptNode.setAttribute("type", "text/javascript");
            scriptNode.setAttribute("src", BMap_URL);
            document.body.appendChild(scriptNode);
        });
    }
}

　

            MP.init().then((BMap)=>{
                this.init()
            });

 动态加载js通用方法

function setScript(src){
    return new Promise((resolve,reject)=>{
        let scriptNode=document.createElement('script');
        scriptNode.src=src;
        document.head.appendChild(scriptNode);
        scriptNode.onload=function(){
            resolve();
        }
    })
}
//调用
setScript('1.js').then(()=>{
    alert('加载成功!');
})