Use the fa-spin class to get any icon to rotate. Works well with fa-spinner , fa-refresh , and fa-cog . <i ... ... <看更多>

... class="cogs slow-ani"> <i class="fas fa-cog fa-4x fa-spin" data-fa-transform="down-5 right-5"></i> <i class="fas fa-cog fa-3x fa-spin" ... ... <看更多>

on Safari the cog icon was wobbling as you describe. I was able to fix it by adding the fa-fw class: doc: "fa fa-cog fa ... ... <看更多>