JS Reference

JS by Category JS by Alphabet

JavaScript

JS Array JS Boolean JS Classes JS Date JS Error JS Global JS JSON JS Math JS Number JS Operators JS RegExp JS Statements JS String

Window

Window Object Window Console Window History Window Location Window Navigator Window Screen

HTML DOM

DOM Document DOM Element DOM Attributes DOM Events DOM Event Objects DOM HTMLCollection DOM Style
alignContent alignItems alignSelf animation animationDelay animationDirection animationDuration animationFillMode animationIterationCount animationName animationTimingFunction animationPlayState background backgroundAttachment backgroundColor backgroundImage backgroundPosition backgroundRepeat backgroundClip backgroundOrigin backgroundSize backfaceVisibility border borderBottom borderBottomColor borderBottomLeftRadius borderBottomRightRadius borderBottomStyle borderBottomWidth borderCollapse borderColor borderImage borderImageOutset borderImageRepeat borderImageSlice borderImageSource borderImageWidth borderLeft borderLeftColor borderLeftStyle borderLeftWidth borderRadius borderRight borderRightColor borderRightStyle borderRightWidth borderSpacing borderStyle borderTop borderTopColor borderTopLeftRadius borderTopRightRadius borderTopStyle borderTopWidth borderWidth bottom boxShadow boxSizing captionSide caretColor clear clip color columnCount columnFill columnGap columnRule columnRuleColor columnRuleStyle columnRuleWidth columns columnSpan columnWidth counterIncrement counterReset cursor direction display emptyCells filter flex flexBasis flexDirection flexFlow flexGrow flexShrink flexWrap cssFloat font fontFamily fontSize fontStyle fontVariant fontWeight fontSizeAdjust height isolation justifyContent left letterSpacing lineHeight listStyle listStyleImage listStylePosition listStyleType margin marginBottom marginLeft marginRight marginTop maxHeight maxWidth minHeight minWidth objectFit objectPosition opacity order orphans outline outlineColor outlineOffset outlineStyle outlineWidth overflow overflowX overflowY padding paddingBottom paddingLeft paddingRight paddingTop pageBreakAfter pageBreakBefore pageBreakInside perspective perspectiveOrigin position quotes resize right scrollBehavior tableLayout tabSize textAlign textAlignLast textDecoration textDecorationColor textDecorationLine textDecorationStyle textIndent textOverflow textShadow textTransform top transform transformOrigin transformStyle transition transitionProperty transitionDuration transitionTimingFunction transitionDelay unicodeBidi userSelect verticalAlign visibility width wordBreak wordSpacing wordWrap widows zIndex

Web APIs

API Console API Fullscreen API Geolocation API History API MediaQueryList API Storage

HTML Objects

<a> <abbr> <address> <area> <article> <aside> <audio> <b> <base> <bdo> <blockquote> <body> <br> <button> <canvas> <caption> <cite> <code> <col> <colgroup> <datalist> <dd> <del> <details> <dfn> <dialog> <div> <dl> <dt> <em> <embed> <fieldset> <figcaption> <figure> <footer> <form> <head> <header> <h1> - <h6> <hr> <html> <i> <iframe> <img> <ins> <input> button <input> checkbox <input> color <input> date <input> datetime <input> datetime-local <input> email <input> file <input> hidden <input> image <input> month <input> number <input> password <input> radio <input> range <input> reset <input> search <input> submit <input> text <input> time <input> url <input> week <kbd> <label> <legend> <li> <link> <map> <mark> <menu> <menuitem> <meta> <meter> <nav> <object> <ol> <optgroup> <option> <output> <p> <param> <pre> <progress> <q> <s> <samp> <script> <section> <select> <small> <source> <span> <strong> <style> <sub> <summary> <sup> <table> <tbody> <td> <tfoot> <th> <thead> <tr> <textarea> <time> <title> <track> <u> <ul> <var> <video>

Other References

CSSStyleDeclaration JS Conversion


자바스크립트 상수

상수 배열:

// Create an array:
const cars = ["Saab", "Volvo", "BMW"];

// Change an element:
cars[0] = "Toyota";

// Add an element:
cars.push("Audi");

상수 개체:

// Create an object:
const car = {type:"Fiat", model:"500", color:"white"};

// Change a property:
car.color = "red";

// Add a property:
car.owner = "Johnson";

정의 및 사용

문 은 const변수를 선언합니다.

변수는 정보를 저장하는 컨테이너입니다.

JavaScript에서 변수를 생성하는 것을 변수 "선언"이라고 합니다.

const name = "Volvo";

메모

const 변수는 선언할 때 할당해야 합니다.

또한보십시오:

JavaScript 참조: JavaScript 변수

JavaScript 참조: JavaScript let

튜토리얼:

JavaScript 튜토리얼: JavaScript 변수

JavaScript 튜토리얼: JavaScript const

JavaScript 튜토리얼: JavaScript let

JavaScript 튜토리얼: JavaScript 범위


통사론

const name = value;

매개변수

Parameter Description
name Required.
The name of the variable.
Variable names must follow these rules:

Must begin with a letter, or $, or _
Names are case sensitive (y and Y are different)
Reserved JavaScript words cannot be used as names
value Required.
A value to be assigned to the variable.


JavaScript const는 언제 사용합니까?

일반적으로 const값이 변경될지 모르는 경우가 아니면 항상 로 변수를 선언하십시오.

const선언할 때 사용 :

  • 새로운 어레이
  • 새로운 개체
  • 새로운 기능
  • 새로운 정규 표현식

브라우저 지원

const모든 최신 브라우저에서 지원됩니다.

Chrome IE Edge Firefox Safari Opera
Yes 11 Yes Yes Yes Yes

constECMAScript6(ES6 - JavaScript 2015) 기능입니다.