Is that bad for SEO?<h1 class=responsive-hidden>This is my title</h1><h1 class=hidden responsive-show>This is my title</h1>
Two duplicated  tags and one hidden
seo;html;css;hidden text
Yes, only one H1.But there's an easy solution, which has it's own flaws (you could get very weird titles in SEO results!):<h1>    <span class=responsive-hidden>This is my title</span>    <span class=hidden responsive-show>This is my title</span></h1>This is not a perfect solution! This is perfect for less importent elements in your page, but not so much for titles.If this is because of too long strings:h1{    text-overflow: ellipsis;    overflow: hidden;    white-space: nowrap;}This will visually cut of the string to the max of the container, placing 3 dots in the end like this...