Табуляция в HTML: 4 способа сделать отступ
По умолчанию браузеры игнорируют последовательности из нескольких пробелов, учитывая только первый. Однако, в некоторых случаях есть необходимость сделать отступ в HTML документе.
Отдельного символа табуляции в HTML не существует, тем не менее, даже без специального кода или знака табуляции, есть много способов достичь нужного результата.
Основные способы сделать табуляцию
Способы сделать табуляцию в HTML:
- Используя CSS свойство margin-left .
- С помощью спецсимвола неразрывный пробел .
- Несколькими пробелами внутри тега <pre> .
- Задать блоку CSS свойство white-space и использовать пробелы.
Примеры. Табуляция в HTML
Способ 1: Делаем отступ, например, 50 пикселей от левого края с помощью свойства CSS margin-left .
Способ 2: Используем специальный символ HTML — неразрывный пробел. Каждый nbsp; равен одному пробелу и не будет игнорироваться браузером. Однако неразрывные пробелы не переносятся на следующую строку. Это следует учитывать, если табуляция делается как отступ внутри текста.
Способ 3: Пишем текст внутри тега <pre> . По умолчанию, браузеры не игнорируют пробелы внутри этого тега. Подробнее в статье: Тег <pre> HTML предварительно отформатированный текст.
Способ 4: Меняем у блока правило учета пробелов через CSS свойство white-space .
Каждый из этих способов будет работать. Какой больше подойдет в конкретном случае — решать вам. Мне в своей практике доводилось использовать все 4 способа табуляции, приведенные выше. Чаще всего использую CSS отступы и неразрывные пробелы.
Как сделать tab в html
Spacing can be added using HTML and CSS by 3 approaches:
Method 1: Using the special characters designated for different spaces
The character entity used to denote a non-breaking space which is a fixed space. This may be perceived as twice the space of a normal space. It is used to create a space in a line that cannot be broken by word wrap.
The   character entity used to denote an ‘en’ space which means half point size of the current font. This may be perceived as twice the space of a normal space.
The   character entity used to denote an ’em’ space which means equal to the point size of the current font. This may be perceived as four times the space of a normal space.
Syntax:
Example:
In the above code the regular space and two space and four space gaps code is not visible so here is how it looks
Output:
Method 2: Using the tab-size property to set spacing for tab characters
The tab-size CSS property is set the number of spaces each tab character will display. Changing this value allows inserting the needed amount of space on one tab character. This method however only works with pre-formatted text (using <pre> tags).
The tab character can be inserted by holding the Alt and pressing 0 and 9 together.
How to get a tab character?
In HTML, there is no character for a tab, but I am confused as to why I can copy and paste one here: " " (You can’t see the full width of it, but if you click to edit my question, you will see the character.) If I can copy and paste a tab character, there should be a unicode equivalent that can be coded into html. I know it doesn’t exist, but this is a mystery I’ve never been able to grasp.
So my question is: why is there not a unicode character for a tab even if I can copy and paste it?
How to Add an HTML Tab and Avoid Whitespace Collapse
TL;DR – In HTML, tab is a piece of whitespace equal to four HTML spaces in size.
Contents
Adding Tab Space in HTML
Unlike with HTML space, there is no particular HTML tab character you could use. You could technically use the 	 entity as the tab is character 9 in the ASCII. Unfortunately, HTML parsers will simply collapse it into a single space due to the whitespace collapse principle.
There used to be a special tab element. However, it became obsolete in HTML3 more than two decades ago, and even then browsers didn’t support it universally.
One tab in HTML equals four spaces. Unfortunately, due to possible whitespace collapse, you can’t just type in four spaces, as HTML will collapse them all into a single space.
One possible solution is simply using the non-breakable space four times:
Preformatting your text is also an option. The <pre> tags preserve both HTML tabs and spaces the way they were typed:
Remember the browser will display it in a fixed-width font (like Courier) by default. However, you can change it using CSS properties anytime without affecting HTML tabs and spaces.
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CSS Alternatives for HTML Tab
Even though it’s useful to know how to tab in HTML, some cases do require using alternatives. When writing text documents, you might use tabs to modify layout or move your text fragments to a different place. In web design, it’s a bit different, and those tasks should be achieved by using CSS properties: