Stop Making Developers Guess Which Icons to Mirror in RTL
Direction is part of an icon’s behavior. In right-to-left interfaces, some icons should mirror. Others should not. A back arrow usually changes direction. A checkmark does not. A reply icon may be directional. A clock should normally remain unchanged. A brand logo definitely should not be mirrored just because the interface is RTL. The problem is that this knowledge often lives in documentation,…
An icon's behavior includes whether or not it should flip directionally in right-to-left (RTL) interfaces. Some icons, like a back arrow, need to mirror, while others, like a checkmark, should not. This directional behavior should be an inherent part of the icon system, not something developers have to manually decide each time.
Currently, developers often find themselves guessing which icons should mirror in RTL interfaces. This leads to inconsistencies across the application, with some icons mirroring while others do not. To solve this problem, an icon catalog can store metadata about each icon, including whether it is direction-sensitive and should mirror in RTL.
By encoding this behavior directly into the icon, developers no longer need to guess or write redundant code for RTL support. This approach centralizes the decision-making process within the icon system itself. For example, an icon catalog could contain multiple properties such as name, geometry, accessibility role, categories, aliases, and directional behavior.
When an icon is used within a component, the system can handle the RTL logic centrally, eliminating the need for repeated conditional rendering. This approach is more robust than relying on developers' memory or design system documentation. By storing the directional behavior alongside the icon asset, it ensures consistent RTL behavior across various outputs like SVG files, React components, Vue components, and even desktop applications. This change makes RTL support an integral part of the icon system, rather than an afterthought.
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