I can't see why this wouldn't work with em (eg. 1em - 1.5em). As far as I'm aware it's still considered best practice to use em, but I'd be interested in seeing what you find.
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OK, I'm back, and I don't think there's a CSS solution using just rems/ems because of how calc works and that vw is rendered in pixels. To achieve something similar, which respects any user-defined font preferences, you have to use JavaScript. I added this solution to the post.
It allows the dev to define values, including min/max breakpoints and font sizes. Those values will be used, creating the same fluid typography scale as with the SCSS solution, unless the user has defined a default font size. In that case, the function will determine the same ratio between the user-defined min font size and maximum (using rems) to maintain a similar fluid design scheme.
Nicolas Hoizey has an article about the importance of respecting default font sizes; he also uses a technique on his site for fluid typography using CSS variables, which might be appealing. Inspect the root element to see the variables.
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I can't see why this wouldn't work with em (eg. 1em - 1.5em). As far as I'm aware it's still considered best practice to use em, but I'd be interested in seeing what you find.
OK, I'm back, and I don't think there's a CSS solution using just rems/ems because of how calc works and that vw is rendered in pixels. To achieve something similar, which respects any user-defined font preferences, you have to use JavaScript. I added this solution to the post.
It allows the dev to define values, including min/max breakpoints and font sizes. Those values will be used, creating the same fluid typography scale as with the SCSS solution, unless the user has defined a default font size. In that case, the function will determine the same ratio between the user-defined min font size and maximum (using rems) to maintain a similar fluid design scheme.
Nicolas Hoizey has an article about the importance of respecting default font sizes; he also uses a technique on his site for fluid typography using CSS variables, which might be appealing. Inspect the root element to see the variables.