Css content character codes. Whitespace characters and their formatting of code in Html, as well as special non-breaking space characters and other mnemonics

Hello, dear readers of the blog site. A little earlier, we already managed to talk about that, and also learned about the design in it. Today we have in turn the concept of white space in HTML, as well as the associated code formatting when writing it (for the convenience of its subsequent reading and perception).

Well, due to the fact that we will touch on the topic of non-breaking space and soft hyphenation, we will have to focus our attention on the so-called special characters or mnemonics used in the Html language, which will allow you to add to the code web document many additional symbols, like the one already mentioned above. But first things first.

Spaces and whitespace characters in HTML

Before moving on to the issue of formatting text using tags specially designed for this (paragraph, headings, etc.), I want to dwell on how spaces, line breaks (Enter) and tabulation are interpreted in the HTML language, and how breaking is carried out text in the browser window when it is resized.

True, for this kind of visual formatting (which will not be visible on the web page), most often it is not the spaces themselves that are used, but rather the tab and line break characters. There is such a rule - when you start writing a nested HTML tag, That indent using tabs(Tab key on the keyboard), and when you close this tag, remove the indentation (key combination Shift+Tab on the keyboard).

This must be done so that the opening and closing tags are at the same vertical level (at the same number of tabs from the right edge of the page in your Html editor, for example, Notepad++, which I wrote about). In addition, I advise you to immediately after writing the opening element make several line breaks and immediately write the closing one at the same level (number of tabs), so that you don’t forget to do this later.

Those. the opening and closing elements should be at the same level vertically, and the internal tags should be shifted by one tab character and placing the closing and opening ones again on the same level.

For simple web documents this may seem like overkill, but when creating more or less complex ones, they the code will become much more clear and readable due to the abundance of spaces, and it will also be much easier to spot errors due to the symmetrical arrangement of tags.

Special characters or mnemonics in HTML code

So, now let's talk about the so-called special characters, the ease of use of which I announced at the beginning of this article. Special characters are also sometimes called mnemonics or substitutions. They are intended to solve a problem that arose in the language quite a long time ago. hypertext markup problem related to the encodings used.

When you type text on the keyboard, the characters of your language are encoded according to a predetermined algorithm, and then they are displayed on the site using the fonts you use (where to find and how to install for the site) due to decoding.

There are a lot of encodings, but for the Html language the extended version of encodings was adopted by default.

In this text encoding it was possible to write only 256 characters - 128 from ASCII and another 128 for Russian letters. As a result, a problem arose with the use on sites of characters that are not included in ASCII and are not Russian letters that are part of the Windows encoding 1251 (CP1251). Well, you decided to use a tilde or an apostrophe, but such possibilities are initially in the used HTML language the encoding is not included.

It is for such cases that substitutions or, in other words, mnemonics were invented. Initially special characters had digital view records, but then for the most common ones their letter counterparts were added to make them easier to remember.

In general terms, a mnemonic is a character that begins with an ampersand “&” and ends with a semicolon “;”. It is based on these characteristics that the browser, when parsing HTML code, extracts special characters from it. The ampersand in a numeric wildcard code must be immediately followed by a pound sign "#", sometimes called a hash. And only then follows the digital code of the desired character in Unicode encoding.

More than 60,000 characters can be written in Unicode - the main thing is that the mnemonic symbol you need is supported by the font used on your site. There are fonts that support almost all Unicode characters, and there are options only with a certain set of characters.

The full list of special characters will be simply huge, but most commonly used mnemonics you can borrow for example from this table:

There is quite an interesting method of obtaining HTML code mnemonic for the sign you need. To do this, it will be enough to open Microsoft editor Word, create new document and choose from top menu“Insert” - “Symbol” (I’m using the 2003 version, so I don’t know how to do a similar operation in later versions).

In the window that opens, you need to select a font, for example, Times New Roman (or any other that will obviously be present on the majority of computers of your site visitors - Courier or Arial, for example).

Add from the list that opens to yours Word document all the special characters you need and save this Word document as a web page (selected from the “.html” drop-down list when saving). Well, then all you have to do is open this web page in any HTML editor(the same Notepad++ will do) and you will see everything digital codes mnemonics you need:

The method is a little complicated, but if you want to use some rare special character on your website page, then it will be easier than searching on the Internet for tables like the one shown just above. You will need to paste the resulting special character code into right place and instead of it on the web page, the browser will display the character you need (for example, a non-breaking space).

Non-breaking space and soft hyphen in examples

As I mentioned above and as you can see from the table of special characters given just above, some mnemonics in Html received, in addition to digital, also a symbolic designation for their more simple memorization. Those. Instead of the hash sign “#” (hash), words are used in symbolic variants. For example, the same non-breaking space can be written either as (digital mnemonic) or as (character).

When writing articles, if you need to insert an ampersand (&) or opening sign into the text of the document angle bracket (<), то для этого обязательно нужно использовать спецсимволы. Дело в том, что эти знаки в Html означают начало тега и браузер будет рассматривать их именно с этой точки зрения и отображать в тексте не будет.

That is, if you are writing an article in which you will need to insert, for example, a tag display into the text< body>or you just need to insert a less than sign (<), то сделав это без использования подстановок на веб странице вы ничего не увидите, т.к. браузер, обнаружив «<» , поймет, что это Html тег, а не текст статьи.

Therefore, you will need to insert the following construction to solve a similar problem:

The same applies to displaying the code of the mnemonics themselves, since they begin with an ampersand. You will need to insert the code into the text, replacing the ampersand sign with its substitution (special character):

This will need to be done to get on the page<, а не отображение левой угловой скобки (<), в которую преобразует браузер мнемонику <, обнаружив при разборе знак амперсанда. Хитро, но вы все поймете попробовав это на практике.

You will also most likely use a non-breaking space, which will look like a regular space on a web page, but the browser will not treat it as a space character at all and will not carry out transfers on it(for example, this will be appropriate for phrases such as 1400 GB, etc., which it would not be advisable to hyphenate across different lines):

1400 GB.

Sometimes the opposite situation may arise, when the text contains very long words and you want to make sure that, if necessary, the browser I could break these words with hyphenation. For such purposes, a special symbol “soft transfer” is provided -

Long, long word;

When it becomes necessary to move to another line, the browser will use a hyphen instead of the soft hyphen mnemonic and send the rest of the word to the next line. If there is enough space to place this entire word on one line, then the browser will not draw any newline. It's that simple.

Good luck to you! See you soon on the pages of the blog site

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Hello, dear readers of the blog site! Those who have at least superficially familiarized themselves with it have probably already taken note, albeit in general terms. This means they have an idea of ​​what HTML symbols are generally used in the document code.

In today's article we will try to figure out what a space is in HTML and in what cases you can use whitespace characters when formatting the code itself for easy reading. We will find out when it is necessary to use a non-breaking space, and also get acquainted with other special characters (or, as they are also called, mnemonics).

In fact, I would advise you not to ignore the topic of using various special characters, since this is an important component that allows you to complete your study of hypertext markup language. In general, the information provided in this publication will definitely not be superfluous. Well, now to the point.

Spaces and whitespace characters in HTML

First there is an important note to make. There are special keys on a computer keyboard that allow you to separate text (more on this below). However, only a wide spacebar provides separation between words not only in the editor, but also in the browser window. There are nuances when breaking lines and indenting from edges.

As you know, the display of certain elements in a web browser is determined by tags. To format the text, the well-known , which is block-based, is used. That is, its content is located across the entire available width.

To wrap lines within paragraph P, you need to use a single BR tag, with which you can do this. Let's say we need to insert into the text some lines from a poem that we write in a text editor:

Despite the fact that the lines of the verse are located correctly and the hyphens are made in the right places, everything will look different in the browser:

To achieve the same display in a web browser window, you need to write BR at each line break:

Now we have achieved the task and the poetic lines will be displayed completely correctly in the browser:

Thus, the necessary line breaks are completed. Another feature that needs to be noted here is that multiple spaces coming one after another are displayed by the web browser as one. You can verify this if in the same editor you try to put not one, but several spaces between two words and, by clicking on the “Save” button, look at the result in the browser.

Space, tab and line break

Basically, with these whitespace characters We get to know each other as soon as we start working with the text in the editor and format it in the required form. To implement such a task, there are special keys, each of which corresponds to its own space character:

• Spacebar is the widest key on a computer keyboard (without a label);
• Tab - a key on the left with the inscription “Tab” and two arrows pointing in different directions;
• Line break - "Enter" key.

However, as I said above, we get the final desired result not only in a text editor, but also in a browser, only when we use the first key. All three keys (including tab and line break are useful when formatting HTML code. Let’s say this is what a code fragment looks like in NotePad++ (there’s a lot of information about this editor) when displaying all whitespace characters:

We get code that is easy to read and understand thanks to spaces. Orange arrows indicate indentations created using the Tab key, and CR and LF symbols indicate line breaks created using the Enter key.

Containers nested within one another are viewed, and opening and closing tags are clearly visible. In this form, this code can be easily edited. Now compare it with the same code, which does not have such text division:

In the same way, using whitespace characters, you can write CSS rules that will visually look clear and digestible:

After you bring all the styles to a common denominator and completely finish editing the styles file, you can perform the editing by removing all spaces from the code. This is necessary to increase , which is very important when promoting a resource.

Special characters (or mnemonics) in HTML code

Now let's look at the cases in which it is necessary to use the special characters that I mentioned at the beginning of the article. HTML special characters, sometimes called mnemonics, were introduced to solve a long-standing problem with encodings that arose in hypertext markup language.

When you type text on the keyboard, the characters of the language you are using are encoded. In the web browser, the typed text will be displayed using the fonts you selected as a result of the reverse decoding operation.

The fact is that there are many such encodings; now we have no goal of analyzing them in detail. It’s just that each of them may lack certain symbols, which, however, need to be displayed. Let's say you feel the urge to write single quotation marks or an accent mark, but these icons are simply not included in the set.

In order to eliminate this problem, a system of special symbols was introduced, which includes a huge number of different mnemonics. They all start with an ampersand "&" and usually end with a semicolon ";". At first, each special character had its own digital code. For example, for a non-breaking space, which we will consider in more detail below, the following entry will be valid:

But after some time, the most common symbols were assigned letter counterparts (mnemonics) to make them easier to remember. Let's say for the same non-breaking space it looks like this:

As a result, the browser displays the corresponding symbol. The list of mnemonics is very voluminous, most commonly used special characters in HTML you can discover from below following table:

Cases of using some special characters, including non-breaking space and soft hyphen

If you have already studied the table a little, you have received confirmation of what I said above, that to display all special characters, a digital code () or its alphabetic analogue (symbolic mnemonics) is used, where instead of a set of hash marks and numbers, letters () are written.

Now let's see when to use these codes. Let's say in an article you need to indicate some HTML tag for informational purposes, for example,