JSFiddle - React, Tailwind, and code Playground

JavaScript

var jsonLikeString = "relativeid: 4, name: test2, type:  teset3, multiples: yes, cat: yes";

var jsObject = {};

var splitStrings = jsonLikeString.split(",");

for(var i in splitStrings){
    if(splitStrings.hasOwnProperty(i)){     
        var kvPair = splitStrings[i];
        var kvPairArray = kvPair.split(":");
        jsObject[kvPairArray[0]] = kvPairArray[1];
    }
}