Global attributes

A space-separated list of the classes of the element. Classes allow CSS and JavaScript to select and access specific elements via the class selectors or functions like the method Document.getElementsByClassName().

Forms a class of attributes, called custom data attributes, that allow proprietary information to be exchanged between the MathML and its DOM representation that may be used by scripts. All such custom data are available via the MathMLElement interface of the element the attribute is set on. The HTMLElement.dataset property gives access to them.

An enumerated attribute indicating the directionality of the MathML element. It can have the following values:

• ltr, which means left to right and is used to render mathematical expressions from the left to the right (e.g. English or Moroccan style);
• rtl, which means right to left and is used to render mathematical expressions from the right to the left (e.g. Maghreb or Machrek style);

a boolean setting the math-style for the element.

• true, which means normal.
• false, which means compact.

Defines a unique identifier (ID) which must be unique in the whole document. Its purpose is to identify the element when linking (using a fragment identifier), scripting, or styling (with CSS).

A background-color for the element.

A color for the element.

A <length-percentage> used as a font-size for the element.

A cryptographic nonce ("number used once") which can be used by Content Security Policy to determine whether a given fetch will be allowed to proceed.

Specifies a math-depth for the element. See the scriptlevel page for accepted values and mapping.

Contains CSS styling declarations to be applied to the element. Note that it is recommended for styles to be defined in a separate file or files. This attribute and the <style> element have mainly the purpose of allowing for quick styling, for example for testing purposes.

An integer attribute indicating if the element can take input focus (is focusable), if it should participate to sequential keyboard navigation, and if so, at what position. It can take several values:

• a negative value means that the element should be focusable, but should not be reachable via sequential keyboard navigation;
• 0 means that the element should be focusable and reachable via sequential keyboard navigation, but its relative order is defined by the platform convention;
• a positive value means that the element should be focusable and reachable via sequential keyboard navigation; the order in which the elements are focused is the increasing value of the tabindex. If several elements share the same tabindex, their relative order follows their relative positions in the document.