Node.js 웹서버로 만들기   http://localhost:3000

var http = require('http');
var fs = require('fs');
var app = http.createServer(function(request,response){
    var url = request.url;
    if(request.url == '/'){
      url = '/index.html';
    }
    if(request.url == '/favicon.ico'){
      //return response.writeHead(404);
      response.writeHead(404);
      response.end();
      return;
    }
    response.writeHead(200);
    console.log(__dirname + url);
    response.end(fs.readFileSync(__dirname + url));

});
app.listen(3000);

https://youtu.be/VGZTn1diz_I

opentutorials.org/course/3332/21032

소스 : github.com/web-n/web1_html_internet

nodejs.org/ko/들어가서 다운로드 후 설치.

설치 후 CMD 뛰워서 아래와 같이 버전 및 실행 테스트. 

C:\Users\HWKim>node -v
v14.15.1

C:\Users\HWKim>node
Welcome to Node.js v14.15.1.
Type ".help" for more information.
> console.log(1+1)
2
undefined
> console.log(1+1);
2
undefined
>
(To exit, press Ctrl+C again or Ctrl+D or type .exit)
>

C:\Users\HWKim>

강의 리스트 : opentutorials.org/course/3332

유튜브 재생목록 : www.youtube.com/playlist?list=PLuHgQVnccGMA9QQX5wqj6ThK7t2tsGxjm

javascript Chart circular gauge color-bar

jscharting.com/examples/chart-types/circular-gauge/colorbar-marker/#

jQuery 데이터 속성 값을 기반으로 요소를 찾는 방법은 무엇입니까?

jQuery how to find an element based on a data-attribute value?

I've got the following scenario:

var el = 'li';

and there are 5 <li>'s on the page each with a data-slide=number attribute (number being 1,2,3,4,5 respectively).

I now need to find the currently active slide number which is mapped to var current = $('ul').data(current); and is updated on each slide change.

So far my tries have been unsuccessful, trying to construct the selector that would match the current slide:

$('ul').find(el+[data-slide=+current+]);

does not match/return anything…

The reason I can't hardcode the li part is that this is a user accessible variable that can be changed to a different element if required, so it may not always be an li.

How to format $.now() with Jquery

$.now() gives me the time as miliseconds. I need to show it something like hh:mm:ss

$ .now ()는 시간을 밀리 초 단위로 제공합니다. hh : mm : ss와 같이 표시해야합니다.

How to format $.now() with Jquery

function formatTimeOfDay(millisSinceEpoch) {
  var secondsSinceEpoch = (millisSinceEpoch / 1000) | 0;
  var secondsInDay = ((secondsSinceEpoch % 86400) + 86400) % 86400;
  var seconds = secondsInDay % 60;
  var minutes = ((secondsInDay / 60) | 0) % 60;
  var hours = (secondsInDay / 3600) | 0;
  return hours + (minutes < 10 ? ":0" : ":")
      + minutes + (seconds < 10 ? ":0" : ":")
      + seconds;
}

.

 jQuery - append, prepend, after, before

before : 선택한 요소의 앞에 내용 삽입

after : 선택한 요소의 뒤에 내용 삽입 

prepend : 선택한요소의 자식요소 앞에 내용삽입

append : 선택한요소의 자식요소 뒤에 내용삽입

.