수업 진행
flex, DB : 윈도우 기준 my SQL
<!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>class_01.html</title>
<style>
.parent {
border: 5px solid green;
display: flex;
justify-content: center;
justify-content: flex-start;
justify-content: fleend;
}
.parent div {
width: 300px;
color: #fff;
text-align: center;
font-size: 30px;
margin: 5px;
background-color: crimson;
}
</style>
</head>
<body>
<div class="parent">
<div class="child">.child</div>
</div>
</body>
</html>
<!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>class_02.html</title>
<style>
.parent {
height: 300px;
border: 5px solid green;
display: flex;
justify-content: space-between;
/* justify-content: flex-start;
justify-content: flex-end; */
}
.parent div {
width: 300px;
color: #fff;
text-align: center;
font-size: 30px;
margin: 5px;
background-color: crimson;
}
.child1 {
height: 100px;
}
.child2 {}
.child3 {
height: 200px;
}
</style>
</head>
<body>
<div class="parent">
<div class="child1">.child1</div>
<div class="child2">.child2</div>
<div class="child3">.child3</div>
</div>
</body>
</html>
<!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>class_03.html</title>
<style>
.parent {
border: 5px solid green;
height: 500px;
display: flex;
align-items: center;
/* align-items: flex-start; */
/*수직으로 쫙 펼치기*/
/* align-items: stretch; */
justify-content: center;
}
.parent div {
width: 100px;
color: #fff;
font-size: 30px;
background-color: crimson;
}
.child1 {}
}
</style>
</head>
<body>
<div class="parent">
<div class="child1">.child1</div>
</div>
</body>
</html>
<!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>class_04.html</title>
<style>
.parent {
border: 5px solid green;
height: 500px;
display: flex;
/* 정방향 */
/* flex-direction: row; */
/* 역방향 */
flex-direction: row-reverse;
}
.parent div {
width: 100px;
height: 100px;
background-color: crimson;
margin: 5px;
text-align: center;
}
</style>
</head>
<body>
<div class="parent">
<div class="child1">child1</div>
<div class="child2">child2</div>
<div class="child3">child3</div>
</div>
</body>
</html>
<!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>class_04 and 05 ex</title>
<style>
.parent {
border: 5px solid green;
height: 500px;
margin: 5px;
display: flex;
flex-direction: row;
flex-direction: column-reverse;
}
.parent div {
color: #fff;
font-weight: bold;
display: grid;
align-content: center;
width: 100px;
height: 100px;
background-color: crimson;
margin: 5px;
text-align: center;
}
.parent2 {
border: 5px solid crimson;
height: 500px;
margin: 5px;
display: flex;
flex-direction: row;
flex-direction: row-reverse;
flex-direction: column;
}
.parent2 div {
color: #fff;
font-weight: bold;
display: grid;
align-content: center;
width: 100px;
height: 100px;
background-color: green;
margin: 5px;
text-align: center;
}
</style>
</head>
<body>
<div class="parent">
<div class="child1">child1</div>
<div class="child2">child2</div>
<div class="child3">child3</div>
</div>
<div class="parent2">
<div class="child1">child1</div>
<div class="child2">child2</div>
<div class="child3">child3</div>
</div>
</body>
</html>
<!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>class_05.html</title>
<style>
.parent {
border: 5px solid green;
height: 500px;
display: flex;
/* 정방향 세로 배치 */
flex-direction: column;
/* 역방향 세로 배치 */
flex-direction: column-reverse;
}
.parent div {
width: 100px;
height: 100px;
background-color: crimson;
margin: 5px;
text-align: center;
}
</style>
</head>
<body>
<div class="parent">
<div class="child1">child1</div>
<div class="child2">child2</div>
<div class="child3">child3</div>
</div>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=
, initial-scale=1.0">
<title>class_06.html</title>
<style>
/* flexwrap : nowrap | wrap | wrap-reverse */
.parent {
border: 5px solid green;
/* display : grid는 변화 없지만 flex는 자동 인라인으로 바뀜 */
display: flex;
flex-wrap: nowrap;
flex-wrap: wrap;
flex-wrap: wrap-reverse;
}
.parent div {
width: 100px;
height: 100px;
color: #fff;
text-align: center;
margin: 5px;
background-color: crimson;
}
</style>
</head>
<body>
<div class="parent">
<div class="child1">1</div>
<div class="child2">2</div>
<div class="child3">3</div>
<div class="child4">4</div>
<div class="child5">5</div>
<div class="child6">6</div>
</div>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=
, initial-scale=1.0">
<title>class_07.html</title>
<style>
/* flexwrap : nowrap | wrap | wrap-reverse */
.parent {
border: 5px solid green;
/* display : grid는 변화 없지만 flex는 자동 인라인으로 바뀜 */
display: flex;
/* flex-direction과 fles-wrap을 축약한 속성 flex-flow */
flex-flow: column nowrap;
}
.parent div {
width: 100px;
height: 100px;
color: #fff;
text-align: center;
margin: 5px;
background-color: crimson;
}
</style>
</head>
<body>
<div class="parent">
<div class="child1">1</div>
<div class="child2">2</div>
<div class="child3">3</div>
</div>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=
, initial-scale=1.0">
<title>class_08.html</title>
<style>
/* 가로 방향으로 wrap 속성 만들어 보기 */
/* flexwrap : nowrap | wrap | wrap-reverse */
.parent {
border: 5px solid green;
/* display : grid는 변화 없지만 flex는 자동 인라인으로 바뀜 */
display: flex;
/* flex-direction과 fles-wrap을 축약한 속성 flex-flow */
flex-flow: row wrap;
/* 레이아웃은 grid 콘텐츠는 flex로 만들라 */
}
.parent div {
display: grid;
align-content: center;
width: 100px;
height: 100px;
color: #fff;
text-align: center;
margin: 5px;
background-color: crimson;
}
</style>
</head>
<body>
<div class="parent">
<div class="child1">1</div>
<div class="child2">2</div>
<div class="child3">3</div>
<div class="child3">4</div>
<div class="child3">5</div>
<div class="child3">6</div>
</div>
</body>
</html>
node.js 설치하기
<!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>class_01</title>
<script>
let message;
message = 'Hello' // 문자열을 저장합니다.
console.log(message);
// alert('nice to meet you');
</script>
</head>
<body>
</body>
</html>
let message;
message = 'Hello' // 문자열을 저장합니다.
console.log(message);
// 'use strict'
//엄격모드 -> ECMA6을 쓰겠다. 이 코드가 최상단에 와야 엄격모드 적용
// let user = 'John';
// let age = 25;
// let massage = 'Hello';
//let massage = 'test';
//선언을 한것을 잊고 다시 선언 할 수 있으므로 아래는 권장 안함
let user = 'John', age = 25, massage = 'Hello';
console.log(user, age, massage);
//변수 명명 규칙
//1. 변수명은 오직 문자와 숫자, 기호 $ , _만 사용할 수 있다.
//2. 첫 글자는 숫자가 될 수 없다.
//카멜 표기법
//대소문자 구별
//let apple 와 let Apple는 서로 다른 변수이다.
//예약어 변수로 사용할 수 없습니다.
//let, class, return, function
//use strict 사용해보기
num = 5;
console.log(num);
//상수
const birthday = '2000.10.10';
// birthday = '1999.10.10';
console.log(birthday);
const COROR_RED = '#f00';
const COROR_GREEN = '#0f0';
const COROR_BLUE = '#00f';
const COROR_ORANGE = '#ff7f00';
let color = COROR_ORANGE;
console.log(color);
//자바스크립트 자료형
//여덟가지 기본 자료형
//no error
let message = "Hello";
message = 12345657;
console.log(message);
//변수는 어떤 순간에 문자열일 수 있고 다른 순간엔 숫자가 될 수도 있다.
//1. 숫자형(number type)
let n = 123;
n = 12.345;
// *, /, +, -
//특수숫자값
//infinity (무한대)
console.log(1 / 0);
//NaN
console.log("숫자가 아님" / 2);
//2.BigInt (수 뒤에 n붙음)
const bigNumber = 1233333333311111111111111111n;
console.log(bigNumber);
//3.문자형
let str = "Hello";
let str2 = 'Hello';
let str3 = `hello`;
console.log(`this return value ${1 + 100}`);//문자열 안에 값을 받아내는
//4. 불린형
let check = true;
let check2 = false;
let isGreater = 4 > 1;
console.log(isGreater);
//5. null 값 (null이라는 값이 있음)
let age = null; //존재하지 않는 값, 알 수 없는 값
console.log(age);
//6. undefined (값이 할당되지 않은 상태를 나타낸다.)
let age2;
console.log(age2);
//7. 객체(object) --> 특수한 자료형
//8. 심볼(symbol) --> 객체에 고유한 식별자를 만들 때 사용합니다.
//9. typeof 연산자
console.log("------------------------");
console.log(typeof (undefined));
console.log(typeof (0));
console.log(typeof (10n));
console.log(typeof (true));
console.log(typeof ("foo"));
console.log(typeof (Math));
console.log(typeof (null));
console.log(typeof (alert));
// 형 변환 type conversion
//숫자 1이 true , 숫자 0이 false
let value = true;
value = String(value);
console.log(typeof (value));
value = "123";
value = Number(value);
console.log(value + 10);
let age = Number("임의의 문자열 123");
console.log(age); //NaN, 형변환이 실패합니다.
//불린형으로 형변환
let abc1 = Boolean(1);
console.log(abc1);
let abc0 = Boolean(0);
console.log(abc0);
//기본 연산자
let x = 1;
x = -x;
console.log(x);
// 거듭 제곱 연산자
console.log(2 ** 2);
console.log(2 ** 3);
console.log(2 ** 4);
let s = "my" + "String";
console.log(s);
console.log('1' + 2); //문자열 연산됨
console.log(2 + '1');
console.log(2 + 2 + '1'); //41
//연산자 우선순위
//단항 덧셈, 단항 부정
//증감 감소 연산자
let counter = 2;
counter++;
console.log(counter);//3
console.log(counter--);//3
console.log(counter);//2
// ++counter , counter++ 가 존재
let a = 1;
let b = 1;
let c = ++a; //2
let d = b++; //1
console.log(c);
console.log(d);
//전위형, 후위형
a = 2;
b = 2;
c = 2;
d = 1;
let test1 = 2;
let test2 = 1 + (test1 *= 2); //5
console.log(test2);
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