HTML 특성 참고서
HTML의 요소들은 특성을 가지고 있습니다. 특성은 사용자가 원하는 기준에 맞도록 요소를 설정하거나 다양한 방식으로 요소의 동작을 조절하기 위한 값을 말합니다.
HTML의 요소들은 특성을 가지고 있습니다. 특성은 사용자가 원하는 기준에 맞도록 요소를 설정하거나 다양한 방식으로 요소의 동작을 조절하기 위한 값을 말합니다.
특성 목록
| 특성 이름 | 요소 | 설명 |
|---|---|---|
accept |
` | 서버에서 허용하는 유형의 목록. 보통 파일 유형을 의미합니다. |
accept-charset |
`` | 지원하는 문자 집합의 목록. |
accesskey |
전역 특성 | 해당 요소로 초점을 이동시키거나 활성화시키기 위한 키보드 단축키를 정의합니다. |
action |
`` | 폼(form)으로부터 전송된 정보를 처리할 프로그램의 URI입니다. |
align |
` |
Content versus IDL attributes
In HTML, most attributes have two faces: the content attribute and the IDL attribute.
The content attribute is the attribute as you set it from the content (the HTML code) and you can set it or get it via element.setAttribute() or element.getAttribute(). The content attribute is always a string even when the expected value should be an integer. For example, to set an <input> element's maxlength to 42 using the content attribute, you have to call setAttribute("maxlength", "42") on that element.
The IDL attribute is also known as a JavaScript property. These are the attributes you can read or set using JavaScript properties like element.foo. The IDL attribute is always going to use (but might transform) the underlying content attribute to return a value when you get it and is going to save something in the content attribute when you set it. In other words, the IDL attributes, in essence, reflect the content attributes.
Most of the time, IDL attributes will return their values as they are really used. For example, the default type for <input> elements is "text", so if you set input.type="foobar", the <input> element will be of type text (in the appearance and the behavior) but the "type" content attribute's value will be "foobar". However, the type IDL attribute will return the string "text".
IDL attributes are not always strings; for example, input.maxlength is a number (a signed long). When using IDL attributes, you read or set values of the desired type, so input.maxlength is always going to return a number and when you set input.maxlength ,it wants a number. If you pass another type, it is automatically converted to a number as specified by the standard JavaScript rules for type conversion.
IDL attributes can reflect other types such as unsigned long, URLs, booleans, etc. Unfortunately, there are no clear rules and the way IDL attributes behave in conjunction with their corresponding content attributes depends on the attribute. Most of the time, it will follow the rules laid out in the specification, but sometimes it doesn't. HTML specifications try to make this as developer-friendly as possible, but for various reasons (mostly historical), some attributes behave oddly (select.size, for example) and you should read the specifications to understand how exactly they behave.