MQ4 states: "User agents should re-evaluate media queries in response to changes in the user environment" MQ3 has the same, phrased differently. I believe this was intentional, but I cannot think of any good reason for using should rather than must in this sentence, and would like to change. The only two reasons I can think of are: 1) If we write MUST, this will delay MQ3 getting to REC => If that's the case, this is no longer relevant, and we can use must 2) We want to allow some user agents to layout and render a static view of the page once, and then never touch it again (no relayout, no interaction, no javascript after the initial load...). => If that's what we want to do, we can carve out a specific exemption for such UAs, without allowing normal interactive browsers to fail to update their media queries when something changes. Or was there something else? - FlorianReceived on Wednesday, 25 March 2015 09:49:27 UTC
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