function createa(url,text)
{ var a=document.createElement("a");
a.setAttribute("href", url);
a.innerHTML=text;
a.style.color="blue";
main.appendChild(a);
} 
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![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
