긍정적 사고, 음식의 절제, 규칙적인 운동

.

https://jsfiddle.net/user/mill01/fiddles/

freeCodeCamp Guide

This website is full of articles about all things related to programming. You can use the search bar above to find something you would like to learn about, or use the navigation to explore the content.

There are articles on:

• SQL
• Mathematics
• JavaScript
• Bootstrap
• Git
• and a whole lot more

https://guide.freecodecamp.org/

Project Deadline - SVG animation with CSS3

.

Build and edit SVGs in the browser http://jxnblk.com/paths

SVG Path Commands

The path element is used to create complex shapes based on a series of commands. Each command begins with a letter and is followed by numbers representing x/y coordinates according to the SVG’s viewBox attribute. Uppercase letters represent absolute coordinate movements, and lowercase letters represent relative movements. For simplicity, the Paths app only supports absolute movements.

For a more in-depth introduction, see the MDN Path Tutorial.

M x y

The Moveto command moves the current point without drawing. Paths must begin with a Moveto command to determine where the drawing starts.

L x y

The Lineto command draws a straight line from the previous command to its x/y coordinates.

H x

The Horizontal Lineto command draws a horizontal line.

V y

The Vertical Lineto command draws a vertical line.

C x1 y1 x2 y2 x y

The Curveto command draws a cubic Bézier curve with control points for the beginning and end of the curve. The final x/y coordinate pair determines where the line ends.

S x2 y2 x y

The Shorthand/Smooth Curveto command draws a cubic Bézier curve with a control point for the end of the curve. The first control point is a reflection of the control point from the previous command.

Q x1 y1 x y

The Quadratic Bézier Curveto command draws a quadratic Bézier curve with a single control point for both points on the curve.

T x y

The Shorthand/Smooth Quadratic Bézier Curveto command draws a quadratic Bézier curve, using a reflection of the previous command’s control point.

Z

The Closepath command draws a line to the intial point to close a path.

A rx ry x-axis-rotaion large-arc-flag sweep-flag x y

Note: The Arc command is currently not supported in the Paths app

The Elliptical Arc command draws an elliptical arc to the x/y coordinates.

How-To Use the App

Unlike other vector drawing applications, Paths has no tool palette or modes. Instead it exposes the path command syntax in a reactive user interface.

• Use the form to the right to manually adjust the type and parameters for each command.
• Add new points with the button below the form.
• Remove points with the × button next to the command.
• Click to select points on the canvas.
• Click and drag to move points.
• Use the arrow keys to nudge points.
• Click anywhere on the canvas to add a new point after the selected point.
• Click the blue × button to the right of the command syntax tooltip to remove a point.
• Click outside of the canvas to deselect all points.
• Use the toolbar below the canvas to toggle the following:
  • Grid visibility
  • Snap to grid
  • Path preview mode
• Use the Download link to save the SVG.
• Use the + & - buttons to zoom in and out.
• Copy and paste the URL (along with the parameters) to share links with others.

 promise  개체는 비동기 작업이 맞이할 미래의 완료 또는 실패와 그 결과 값을 나타냅니다.

Promise는 프로미스가 생성될 때 꼭 알 수 있지는 않은 값을 위한 대리자로, 비동기 연산이 종료된 이후의 결과값이나 실패 이유를 처리하기 위한 처리기를 연결할 수 있도록 합니다. 프로미스를 사용하면 비동기 메서드에서 마치 동기 메서드처럼 값을 반환할 수 있습니다. 다만 최종 결과를 반환하지는 않고, 대신 프로미스를 반환해서 미래의 어떤 시점에 결과를 제공합니다.

Promise는 다음 중 하나의 상태를 가집니다.

• 대기(pending): 이행하거나 거부되지 않은 초기 상태.
• 이행(fulfilled): 연산이 성공적으로 완료됨.
• 거부(rejected): 연산이 실패함.

대기 중인 프로미스는 값과 함께 이행할 수도, 어떤 이유(오류)로 인해 거부될 수 있습니다. 이행이나 거부될 때, 프로미스에 연결한 처리기는 그 프로미스의 then 메서드에 의해 대기열에 오릅니다. 이미 이행했거나 거부된 프로미스에 연결한 처리기도 호출하므로, 비동기 연산과 처리기 연결 사이에 경합 조건race condition은 없습니다.

Promise.prototype.then() 및 Promise.prototype.catch() 메서드의 반환 값은 다른 프로미스이므로, 서로 연결할 수 있습니다.

https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Promise

https://jsfiddle.net/mill01/x3n274tq/