const id = 1
const str = '<div flex={ >'+'.'.repeat(30)
const elementRE = /(<\w[\w:\.$-]*\s)((?:'[^>]*?'|"[^>]*?"|[\{`]([^>]|[\S])*?[\}`]|[^>]*?)*)/g
console.time()
for (const i of Array.from(str.matchAll(elementRE))){
      console.log(i)
}
console.timeEnd()      

const id = 1
const str = '<div flex={ >'+'.'.repeat(30)
const elementRE = /(<\w[\w:\.$-]*\s)([\s\S]*)\/?>/g
console.time()
for (const i of Array.from(str.matchAll(elementRE))){
      console.log(i)
}
console.timeEnd()