node.js 跨域访问

配置

node.js http-server启动方式

http-server -p 5500 

javascript写法

 xhr.onload = function(){
    if(xhr.status===200){
         console.log(xhr.responseText);
        var jsonData = JSON.parse(xhr.responseText)
         render(jsonData)
     }
 }

 function render(jsonData)
 {
     var html = jsonData.data.list.map(item=>`
         <li>
             <img src="${item.imageUrl}"/>
             <div>${item.name}</div>
             <div>${item.note}</div>
         </li>
     `)
     mylist.innerHTML = html
 }

错误

Access to XMLHttpRequest at 'http://192.168.1.20:5500/data.json' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
01.html:17          GET http://192.168.1.20:5500/data.json net::ERR_FAILED 200 (OK)

解决方法

http-server -p 5500 --cors