https://codepen.io/chaffity/pen/qBdmwpB

little-vdom.js

export const h=(t,m,...c)=>({...m,t,m,c})
export const render=(e,d,t=d.t||(d.t={}),m,r,c)=>
  // arrays
  [e].flat(1/0).map((e)=>
  // components
  e.t.call?(e.i=render((render.c=e).t({children:e.c,...e.m},e.s=t.s||{},t=>
    render((e.s={...e.s,...t})&&e,d,e)),t.i||d,t?.i||{}),e):(
  // create notes
  e.d=t.d||(e.t?document.createElement(e.t):new Text(e.m)),
  // diff props
  e.m!=t.m&&(e.t?Object.keys(e.m||{}).map((d)=>
    (c=e.m[d])!=(t.m?.[d])&&(d in e.d?e.d[d]=c:e.d.setAttribute(d,c))):e.d.data=e.m),
  // insert at position
  t.d&&m==r||d.insertBefore(e.d,d.childNodes[m+1]),
  // diff children (typed/keyed)
  e.o=e.c.concat.call([],...e.c).map((d,p)=>render(d=d.c?d:h('',d),e.d,
    t.o?.find((e,c)=>e?.t==d.t&&e.key==d.key&&(c==p&&(p=r),t.o[c]=0,e))||{},p)),
  // remove stragglers
  t.o?.map(e=>e&&e.d.remove()),{...t,...e}
))[0]

little-vdom.min.js

h=(t,m,...c)=>({...m,t,m,c}),render=(e,d,t=d.t||(d.t={}),m,r,c)=>[e].flat(1/0).map((e)=>e.t.call?(e.i=render((render.c=e).t({children:e.c,...e.m},e.s=t.s||{},t=>render((e.s={...e.s,...t})&&e,d,e)),t.i||d,t?.i||{}),e):(e.d=t.d||(e.t?document.createElement(e.t):new Text(e.m)),e.m!=t.m&&(e.t?Object.keys(e.m||{}).map((d)=>(c=e.m[d])!=(t.m?.[d])&&(d in e.d?e.d[d]=c:e.d.setAttribute(d,c))):e.d.data=e.m),t.d&&m==r||d.insertBefore(e.d,d.childNodes[m+1]),e.o=e.c.concat.call([],...e.c).map((d,p)=>render(d=d.c?d:h('',d),e.d,t.o?.find((e,c)=>e?.t==d.t&&e.key==d.key&&(c==p&&(p=r),t.o[c]=0,e))||{},p)),t.o?.map(e=>e&&e.d.remove()),{...t,...e}))[0]
little={h,render};typeof module!='undefined'&&(module.exports=little)

package.json

{"name":"little-vdom","module":"little-vdom.js","main":"little-vdom.min.js","version":"0.1.0"}

@iainreid820 Can you show me an example of how to use Fragments?
When I return an array of divs for example, directly from a component, patching goes wrong.

@jimfranke thank you for reaching out! I'm sorry but I'm not sure I can help you with that, it might be better to direct your question to the original version of this, as this is only an Gzip optimised version of the Gist that I forked.