String.prototype.fontsize()
Deprecated
Avoid using this feature in new projects. HTML wrapper methods exist only for backwards compatibility. Use DOM APIs to create elements instead. This feature may be a candidate for removal from web standards or browsers.
Consider using the following features instead: DOM.
The fontsize() method of String values creates a string that embeds this string in a <font> element (<font size="...">str</font>), which causes this string to be displayed in the specified font size.
Note:
All HTML wrapper methods are deprecated and only standardized for compatibility purposes. For the case of fontsize(), the <font> element itself has been removed from the HTML specification and shouldn't be used anymore. Web developers should use CSS properties instead.
Syntax
fontsize(size)
Parameters
size-
An integer between 1 and 7, or a string representing a signed integer between 1 and 7.
Return value
A string beginning with a <font size="size"> start tag (double quotes in size are replaced with "), then the text str, and then a </font> end tag.
Description
The fontsize() method itself simply joins the string parts together without any validation or normalization. However, to create valid <font> elements, When you specify size as an integer, you set the font size of str to one of the 7 defined sizes. You can specify size as a string such as "-2" or "+3" to adjust the font size of str relative to 3, the default value.
Examples
Using fontsize()
The code below creates an HTML string and then replaces the document's body with it:
const contentString = "Hello, world";
document.body.innerHTML = contentString.fontsize(7);
This will create the following HTML:
<font size="7">Hello, world</font>
Warning:
This markup is invalid, because font is no longer a valid element.
Instead of using fontsize() and creating HTML text directly, you should use CSS to manipulate fonts. For example, you can manipulate font-size through the element.style attribute:
document.getElementById("yourElemId").style.fontSize = "7pt";
Specifications
| Specification |
|---|
| ECMAScript® 2027 Language Specification # sec-string.prototype.fontsize |