if(condition){ the type attribute of the input element). The W3C recommends that you use the authoritative versions of these DTDs at their defined SYSTEM identifiers when validating content. When using the min attribute, ensure this minimum requirement is understood by the user. and . The following hints will reduce this effect for documents which are served without w3.org does not complain when the xmlns attribute is missing. File size isnt reduced by any meaningful amount. Historically, the character encoding of an HTML document is either specified by a web server via the charset parameter of the HTTP Content-Type header, or via a meta element in the The benefits of migrating to XHTML 1.0 are described above. Thats how I feel about it, anyway. SGML and XML both permit references to characters by using hexadecimal values. White space handling in attribute values isnt done according to XML. Ive been through this whole path and even remember being shocked seing could be closed! There were reasons everyone preferred XHTML back in the early 00s. The annotated contents of this file are available in this separate section for completeness. The latest status of this document series is maintained at the Otherwise your document is assumed as an incorrect XHTML document. If you set disabled="SOMETHING", your input will be disabled. The only way to do what you want is to not put the disabled attributes in your form. The following example shows the difference: The min attribute defines the minimum value that is acceptable and valid for the input containing the attribute. If the value of the element is less than this, the element fails validation. This value must be less than or equal to the value of the max attribute. Some input types have a default minimum. In XML, it is relatively easy to introduce new elements or additional A. source B. src C. xmlns D. link Answer & Solution Discuss in Board Save for Later 18. a constraint required in your pages : the doctype, as you dont write it, your page goes quirk mode, its a great tool for all codes in your browser. attribute in HTML 4. Be aware that processing instructions are rendered on some user agents. Visit Mozilla Corporations not-for-profit parent, the Mozilla Foundation.Portions of this content are 19982023 by individual mozilla.org contributors. I dont wanna go back to HTML where Tags are sometime closed and sometimes not, sometimes uppercase sometimes not. Having started my journey during the dark times of and as the method of laying out a website I appreciate the nostalgia of writing HTML like HTML. This section describes the status of this document at the time of its publication. Youve disguised something subjective with a veneer of objectivity. Element and attribute names may not be in lower case. (as a standard) and for adapting HTML to vertical, highly specialized, markets. Here is a list of the minimized attributes in HTML and how they should be written in XHTML: The lang attribute applies to almost every XHTML element. It specifies the language of the content within an element. If you use the lang attribute in an element, you must also add the xml:lang attribute, like this: Otherwise, were left with the mess from back in the day when most browsers had to be very forgiving of the horribly broken HTML which was rampant at the time. For example, in the following markup code, we define a check box that is HTML 4 [HTML4] is an SGML (Standard Generalized Markup Language) application compliant with HTML 4. Example of attribute minimization : input type = checkbox checked XHTML is in many ways similar to HTML , but it is stricter than HTML . Simplify one dimension and you often complicate another; perfectionism tends to increase overall complexity. Attribute names such as compact and WebAttribute minimization is where the values for some attributes are nt defined . production 5. Personally, the less you write the better! My goodness, I got so much flax in a Discord Channel because I ventured out and started not closing my tags. Why would anybody want to write uppercase tags? WebHTML 4 also introduced the idattribute. But thats different from persuading the working developer to care. And coming from the old days of XHTML .. (been away from web design for 5 years) consciously decided now not to close tags if not needed so as to pay more attention. One thing I learned in 30 years of coding: Code should always be as uniform as possible. will not tolerate this incorrect usage, and any document that uses an ampersand incorrectly will not be "valid", and consequently will not conform to this specification. All browser compatibility updates at a glance, Frequently asked questions about MDN Plus. HTML permits attribute minimization, where boolean attributes can have their value omitted entirely, e.g., . In order to be consistent with the XML 1.0 Recommendation [, When a user agent processes an XHTML document as generic XML, it shall only recognize attributes of type. Examples might be simplified to improve reading and learning. XML-based user agents Therefore, style sheets should be able to continue using the shorthand "#" If not explicitly included, step defaults to 1 for number and range, and 1 unit type (second, week, month, day) for the date/time input types. entities such as < and & will be recognized as entity references by the XML processor to < and & respectively. HTML, back then, was loaded with elements for layout, packed with presentational code, largely invalid (as its still today), with wildly varying user agent support. XHTML 1.0: The Extensible HyperText Markup Language (Ive argued this case before in my article, In Critical Defense of Frontend Development.). In the 1990s, there was HTML. Using XHTMLish rules make it easier for non browser parsers, linters, html formatters and so many other tools to work with the code. Weirdly I have saw more people closing self-closing tags (like and
), because Firefox highlights those as errors in `view-source:, than the opposite. In SGML and XML, these are HTML Objective type Questions and Answers. The following characters are defined in [XML] white space characters: The XML processor normalizes different systems' line end codes into one single LINE FEED character, that is passed up to the application. Respectfully, I think that strict conventions tend to make for more readable code. Elements that are declared in the DTD as EMPTY can have an end tag or can use empty element shorthand (see Empty Elements). In XML documents, you must use the You can tell by the rough dates of the specifications, too: HTML 1 1992, HTML 2.0 1995, HTML 3.2 1997, HTML 4.01 1999; XHTML 1.0 2000, XHTML 1.1 2001; HTML5 2007. Yes, some people write without it and always keep an eye of the circumstances, but for me that harms the readability of the code. Alternate ways of accessing the Internet are constantly being introduced. can be found at https://www.w3.org/TR/. Attributes For example, in HTML, the Formfeed character (U+000C) is treated as white space, in XHTML, due to XML's definition of Remember that empty elements dont need to be closed. However not closing s in particular causes extra spaces to be added as part of the elements firstChild text node. Again, theres nothing wrong with caring about this because you find it interesting. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. The values of these For non-empty elements, end tags are not always required. CDATA sections are recognized by the XML processor and appear as nodes in the Document Object Model, see Section 1.3 of the DOM Level 1 Recommendation [DOM]. Entity references as hex values may not only be in lowercase. This must be less than the minimum value (max attribute), if specified. Document developers and user agent designers are constantly discovering new ways to express their ideas through new markup. The HTML way would therefore not suggest documents may not be well-formed. It would also be clear that not only end, but also start tags arent always required. Make sure to quite all attribute values. The part about not closing tags reminds me a lot about those kind of people who write their JavaScript without semicolons. The XHTML entity sets are the same as for HTML 4, but have been modified to be valid XML 1.0 entity declarations. The risk from using it lies entirely with the user. Related Questions on Basic HTML State whether the given statement is true or false. Here is the detail explanation of the above XHTML rules , All XHTML documents must have a DOCTYPE declaration at the start. In XML, an XML stylesheet declaration is used to define style rules. documents are compatible with historical HTML user agents and XML-based user agents, ampersands used in a document that are to be treated as literal characters must be expressed themselves as an what is attribute minimization in html lower-case version (i.e. Just because HTML is more permissive doesnt mean we should lower our standards to it. For an example, see [XHTML+MathML]. The complete set of DTD files together with an XML declaration and SGML Open Catalog is included in the zip file and the gzip'd tar file for this specification. White space handling in attribute values is done according to XML. Yes. Lets actually do this (without the SGML part, because HTML isnt based on SGML anymore): Lets remove the esoteric things; the things that dont seem relevant. contains all the descendant elements. In this example, The , ,