es6 fetch

    
    
    
    


    
    /* 
    *   new http: fetch
    *       promise     ，   ，   
    */

        let url = "http://jsonplaceholder.typicode.com/posts";

        console.log(fetch(url));    // fetch(url)    new Promise((resolved,reject)=> {})

        fetch(url)
            .then(response => response.json())    //   response  
            .then((data) => console.log(data))    //        
            .catch((err) => console.log("error",err))    //      300