re:https://github.com/jaredly/render-react-native-to-image/blob/47bf53ecea5a2593f6518eaa594319eac57aa2ff/src/svg/node-to-svg.ts#L66

gistfile1.txt

const attributes = (settings) => {
  let attributeString = ""
  for (const key in settings) {
    if (settings.hasOwnProperty(key)) {
      const element = settings[key]
      if (element != null) {
        attributeString += ` ${key}="${element}"`
      }
    }
  }
  return attributeString
}
const replaceAll  = (s,find,replace) => s.split(find).join(replace)

const attributes2 = (s) => {
    return replaceAll (
        replaceAll(
            JSON.stringify(s).slice(1,-1)
            ,","
            ," ")
       ,":"
       ,"=")
}
console.log(attributes({a: 1,b: 2}))
console.log(attributes2({a: 1,b: 2}))
 ⚙ elrikdante@elrikgroup-labbook  ~/apps/inbizzz/lib/render-react-native-to-image   master  node test.js
 a="1" b="2"
a"=1 "b"=2
 ⚙ elrikdante@elrikgroup-labbook  ~/apps/inbizzz/lib/render-react-native-to-image   master  node test.js
 a="1" b="2"
"a"=1 "b"=2
 ⚙ elrikdante@elrikgroup-labbook  ~/apps/inbizzz/lib/render-react-native-to-