<tt>
HTML <tt> Tag
The <tt> tag creates an inline text which is displayed in monospace or fixed-width font as it would appear on a teletype or typewriter.
The terms monotype, monospace, and non-proportional have the same meaning. They are used interchangeably and describe a typeface the characters of which are the same number of pixels wide. （术语monotype、monospace和nonproportional具有相同的含义。它们可以互换使用，并描述字符宽度相同的字体。）
The <tt> is a deprecated HTML tag in HTML5.
Instead of the <tt> tag use CSS font-family property or appropriate HTML elements: the <kbd> tag for keyboard input, the <var> tag for variables, the <code> tag for computer code, and the <samp> tag for computer output, the <pre> tag for line breaks and indentation.
Syntax
Syntax （语法）
The <tt> tag comes in pairs. The content is written between the opening (<tt>) and closing (</tt> ) tags.
Example of the HTML <tt> tag:
<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
</head>
<body>
<p>This is an ordinary text.</p>
<p><tt>And this is a teletype text.</tt></p>
</body>
</html>
Result
Example of the CSS font-family used instead of the HTML <tt> tag:
<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
</head>
<body>
<p>This is an ordinary text.</p>
<p style="font-family: monospace">And this is a teletype text.</p>
</body>
</html>
Attributes
Attributes （属性）
The <tt> tag supports the Global Attributes.
How to style <tt> tag? Common properties to alter the visual weight/emphasis/size of text in <tt> tag:
CSS font-style property sets the style of the font. normal | italic | oblique | initial | inherit. CSS font-family property specifies a prioritized list of one or more font family names and/or generic family names for the selected element. CSS font-size property sets the size of the font. CSS font-weight property defines whether the font should be bold or thick. CSS text-transform property controls text case and capitalization. CSS text-decoration property specifies the decoration added to text, and is a shorthand property for text-decoration-line, text-decoration-color, text-decoration-style.
Coloring text in <tt> tag:
CSS color property describes the color of the text content and text decorations. CSS background-color property sets the background color of an element.
Text layout styles for <tt> tag:
CSS text-indent property specifies the indentation of the first line in a text block. CSS text-overflow property specifies how overflowed content that is not displayed should be signalled to the user. CSS white-space property specifies how white-space inside an element is handled. CSS word-break property specifies where the lines should be broken.
Other properties worth looking at for <tt> tag:
CSS text-shadow property adds shadow to text. CSS text-align-last property sets the alignment of the last line of the text. CSS line-height property specifies the height of a line. CSS letter-spacing property defines the spaces between letters/characters in a text. CSS word-spacing property sets the spacing between words.