Introductory example of JavaScript sub method (display string as subscript)_Basic knowledge

JavaScript sub method

The

sub method returns a subscript string defined using the HTML sub tag attribute. Its syntax is as follows:

Copy code The code is as follows:

str_object.sub()

Tip: This method does not comply with ECMA standards and is not recommended.

sub method instance

Copy code The code is as follows:

Run this example, output:

Copy code The code is as follows:

Script House^{Every bit of progress is a solid footprint on our road to success}

Tip: This method returns the subscript string defined using the HTML sub tag, even though this method cannot directly change the string to a subscript style. If you want to dynamically change the element font to a subscript style, you can refer to the following example:

Change the font text top and bottom alignment (superscript/subscript)

Copy code The code is as follows:

Subscript style Superscript style

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In this example, JavaScript is used to control the text CSS vertical-align style to dynamically change the upper and lower alignment (superscript/subscript) of the font text.