js檔案中引入另一個js檔案

function importScript(scriptUrl){
    var script= document.createElement("script");
    script.setAttribute("type", "text/javascript");
    script.setAttribute("src", scriptUrl);
    document.body.appendChild(script);
}


importScript("https://unpkg.com/axios/dist/axios.min.js")
      

執行

importScript

 之後不能馬上擁有對象，需要等待網絡請求

參考

https://blog.csdn.net/qq_42249896/article/details/90769809