Required Sub-elements in HTML

Q

What Is a Required Sub-element?

✍: FYIcenter.com

A

A required sub-element is a sub-element that you must included in the parent element. Most sub-elements are optional. But there are some sub-elements that are required by their parent elements.

Here are two good examples:

  <!-- Valid: "head" requires "title" -->
  <head>
    <title>HTML FAQs by FYIcenter.com</title>
  </head>

  <!-- Valid: "ul" requires "li" -->
  <ul>
    <li>Hope you like it.</li>
  </head>

⇒ White Space Characters in HTML

⇐ Sequence of Sub-elements in HTML

⇑ Introduction of HTML Element Content Syntax

⇑⇑ HTML Tutorials

2024-02-28, 1423🔥, 0💬

What Is a Sub-element in HTML?
What Is a Sub-element in HTML? A sub-element is an HTML element that is included inside the content of another HTML element. The inner element is called the sub-element or child element. The outer element is called the parent element. Together they are called nested elements. Note that which element... 2024-02-28, ∼1930🔥, 0💬

HTML Document Structure and Head Level Tags
Where to find tutorials of introduction to HTML Document Structure and Head Level Tags? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team in introduction to HTML Document Structure and Head Level Tags. Clear answers are provided with tutorial exerci... 2024-02-18, ∼1687🔥, 0💬

What Is CDATA in HTML Documents?
What Is CDATA in HTML documents? CDATA stands for Character DATA, which is used to define a section of data that should not go through the XHTML entity translation (parsing) process. In other words, 3 special characters: "<", ">", and "&" can be directly used in CDATA. They wil... 2024-02-28, ∼1675🔥, 0💬

White Space Characters Handling Rules in HTML
How Exactly White Space Characters Are Ignored? White space characters will be processed (ignored) based where they are located: White space characters will be ignored between block elements. White space characters will be preserved in element "pre". White space characters will be preserved in CDATA... 2024-02-21, ∼1605🔥, 2💬

Two HTML Elements Overlapping Each Other
Can Two HTML Elements Partially Overlap Each Other? No, two elements can not partially overlap each other. One element must be completely enclosed inside the other element. See the following two examples:  <p>There was once ... 2024-02-28, ∼1595🔥, 0💬

White Space Characters in HTML
What Is a White Space Character? A white space character is a character that leaves nothing on your screen. There are 4 known white space characters: " " - The space character. "\t" - The tab character. "\n" - The new line character. "\r" - The carriage return character. White space characters are g... 2024-02-18, ∼1495🔥, 0💬

HTML 'html' Tag/Element
What Is the HTML "html" Tag/Element? The "html" element is the first element you need to learn. The "html" element is used to enclose the entire HTML document. Here are some rules about the "html" element: The html element is the only top level element. The html element is also called the root eleme... 2024-02-18, ∼1455🔥, 0💬

Required Sub-elements in HTML
What Is a Required Sub-element? A required sub-element is a sub-element that you must included in the parent element. Most sub-elements are optional. But there are some sub-elements that are required by their parent elements. Here are two good examples: <!-- Valid: "head" requires "title" --&... 2024-02-28, ∼1424🔥, 0💬

Sequence of Sub-elements in HTML
What Is the Sequence of Sub-elements? The sequence of sub-elements is the order of how each sub-element is placed inside the parent element. For most parent elements, their sub-elements can be placed in any order. But some parent elements require you to follow a predefined sequence. For example, ele... 2024-02-28, ∼1412🔥, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.