javascript-syntax/ch08.html at main · FlounderAround/javascript-syntax · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script>
      //객체의 종류
      var car = {
        //속성: 값이 함수가 아닌 유형
        name: 'MINI',
        model: 'MINI COOPER S',
        color: ['red', 'green', 'blue'],
        mileage: 12.3,
        //메서드: 값이 함수인 유형
        power: function (x) {
          if (x == 'on') {
            alert('POWER ON');
          } else if (x == 'off') {
            alert('POWER OFF');
          }
        },
      };

      //객체 자체 호출
      document.write(car + '<br>');
      //속성 호출
      document.write(car.name + '<br>');
      //메서드 호출
      car.power('on');

      //변수/배열/객체 비교
      //변수 = box, 배열 = 기차, 객체 = 표

      //this 예약어
      var car2 = {
        //속성: 값이 함수가 아닌 유형
        name: 'MINI',
        model: 'MINI COOPER S',
        color: ['red', 'green', 'blue'],
        mileage: 12.3,
        //메서드: 값이 함수인 유형
        power: function (x) {
          if (x == 'on') {
            alert(this.name + ' POWER ON');
          } else if (x == 'off') {
            alert(this.name + ' POWER OFF');
          }
        },
      };
      car2.power('on');

      //생성자 함수
      //여러 개의 통일된 속성을 지정할 때 사용
      function Mini(color, wheel, roof) {
        this.brand = 'Mini 3Door';
        this.oil = 12.3;
        this.door = 3;
        this.color = color;
        this.wheel = wheel;
        this.roof = roof;

        this.start = function (x) {
          if (x == 'on') {
            alert(this.color + ' / ' + this.brand + ' POWER ON');
          } else if (x == 'off') {
            alert('POWER OFF');
          }
        };
      }

      var aCar = new Mini('Island Blue', '16', 'white');
      var bCar = new Mini('Chili Red', '18', 'black');

      aCar.start('on');
      bCar.start('on');

      console.log(aCar);
      console.log(bCar);

      //프로토타입
      function Mini2(color, wheel, roof) {
        this.color = color;
        this.wheel = wheel;
        this.roof = roof;
      }

      Mini2.prototype.brand = 'MINI 3Door';
      Mini2.prototype.oil = 12.3;
      Mini2.prototype.door = '3';

      Mini2.prototype.starting = function (x) {
        if (x == 'on') {
          alert(this.color + ' / ' + this.brand + ' POWER ON');
        } else if (x == 'off') {
          alert('POWER OFF');
        }
      };

      var dCar = new Mini2('Green', '20', 'white');
      console.log(dCar);
      dCar.starting('on');

      function Student(name, korean, english, math) {
        this.name = name;
        this.korean = korean;
        this.english = english;
        this.math = math;
      }

      Student.prototype.average = function () {
        alert(
          this.name +
            '의 평균 점수: ' +
            ((this.korean + this.english + this.math) / 3).toFixed(2)
        );
      };

      var st1 = new Student('홍길동', 90, 80, 75);
      var st2 = new Student('김철수', 100, 80, 90);
      var st3 = new Student('박영희', 100, 90, 100);

      console.log(st1);
      st1.average();
    </script>
  </head>
  <body></body>
</html>