Tab through matched-pair characters ( ) [ ] { } < > " ' `

One awesome timesaver that Sublime has (and VSCode via TabOut extension) is that when the cursor is next to a matched-pair character, pressing tab jumps the cursor “through” to the other side. So convenient.

Indeed; however, I believe Glitch already supports the auto-tab feature while inside a block. Certainly, it’s not optimized but Glitch merely uses a framework named “Code Mirror.”