Replace dir
-dependent float
with logical properties
#14671
Merged
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Stop polyfilling the CSS
calc
functionalityAt this point in time, all browsers that we support have native support for CSS variables; please see https://developer.mozilla.org/en-US/docs/Web/CSS/calc()#browser_compatibility and https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions#faq-support
We can also remove the hack introduced back in PR Add support for CSS variables using the
PostCSS CSS Variables
package (issue 11462) #11567 (comment), which was only necessary to work-around an IE 11 specific bug.Replace
dir
-dependentfloat
with logical propertiesPlease note: This is another step in what will, time permitting, become a series of patches to simplify/modernize the viewer CSS.
Rather than having to manually specify ltr/rtl-specific float-values in the CSS, we can use logical
inline-start
/inline-end
instead (and similar for some related left/right occurrences).These logical properties depend on, among other things, the direction of the HTML document which we always specify in the viewer.
Given that most of these logical CSS properties are fairly new, and that cross-browser support is thus somewhat limited (see below), we rely on PostCSS plugins in order to support this in the GENERIC viewer.