@Gargron readers strip width and height?
@KevinMarks Width and height can’t use non-pixel units, and 1em is what this kind of image needs. Width and height in a style attribute do indeed get stripped sometimes.
@Gargron height=16 as a fallback in the img tag may be a compromise
Gregory's Server
@KevinMarks Width and height can’t use non-pixel units, and 1em is what this kind of image needs. Width and height in a style attribute do indeed get stripped sometimes.