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  2. HTML element - Wikipedia

    en.wikipedia.org/wiki/HTML_element

    Increasing the size of an element's padding increases the amount of space this element will take up. The border of an element is the absolute end of an element and spans the perimeter of that element. The thickness of a border increases the size of an element. The margin of an element is the white space that surrounds an element.

  3. Proper length - Wikipedia

    en.wikipedia.org/wiki/Proper_length

    Proper length [1] or rest length [2] is the length of an object in the object's rest frame. The measurement of lengths is more complicated in the theory of relativity than in classical mechanics . In classical mechanics, lengths are measured based on the assumption that the locations of all points involved are measured simultaneously.

  4. CSS box model - Wikipedia

    en.wikipedia.org/wiki/CSS_box_model

    However, it varied depending on the element. The HTML width attribute of a table defined the width of the table including its border. [7] On the other hand, the HTML width attribute of an image defined the width of the image itself (inside any border). [8] The only element to support padding in those early days was the table cell.

  5. HTML - Wikipedia

    en.wikipedia.org/wiki/HTML

    HTML element content categories. HTML documents imply a structure of nested HTML elements. These are indicated in the document by HTML tags, enclosed in angle brackets thus: < p >. [73] [better source needed] In the simple, general case, the extent of an element is indicated by a pair of tags: a "start tag" < p > and "end tag" </ p >. The text ...

  6. Length contraction - Wikipedia

    en.wikipedia.org/wiki/Length_contraction

    Length contraction is the phenomenon that a moving object's length is measured to be shorter than its proper length, which is the length as measured in the object's own rest frame. [1] It is also known as Lorentz contraction or Lorentz–FitzGerald contraction (after Hendrik Lorentz and George Francis FitzGerald ) and is usually only noticeable ...

  7. List of HTTP header fields - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_header_fields

    Content-Length: The length of the request body in octets (8-bit bytes). Content-Length: 348: Permanent RFC 9110: Content-MD5: A Base64-encoded binary MD5 sum of the content of the request body. Content-MD5: Q2hlY2sgSW50ZWdyaXR5IQ== Obsolete [15] RFC 1544, 1864, 4021: Content-Type: The Media type of the body of the request (used with POST and ...

  8. div and span - Wikipedia

    en.wikipedia.org/wiki/Div_and_span

    Where no existing HTML element is applicable, ... By the correct use of CSS, such 'warnings' may be rendered in a red, bold font on a screen, but when printed out ...

  9. HTML attribute - Wikipedia

    en.wikipedia.org/wiki/HTML_attribute

    HTML attributes are special words used inside the opening tag to control the element's behaviour. It is a piece of markup language used to adjust the behavior or display of an HTML element.HTML attributes are a modifier of a HTML element type. An attribute either modifies the default functionality of an element type or provides functionality to ...