JSFiddle - React, Tailwind, and code Playground

JavaScript

var m ={
  "3":{
    "is_in_stock":false,
    "custom_status_icon":"",
    "custom_status":"Out of Stock",
    "product_id":"9",
    "stockalert":""
  },
  "5":{
    "is_in_stock":true,
    "custom_status_icon":"",
    "custom_status":"",
    "product_id":"10"
   },
  "88":{
    "is_in_stock":true,
    "custom_status_icon":"",
    "custom_status":"",
    "product_id":"296"
    }
}
var _keyArray = Object.keys(m)

_keyArray.forEach(function(item){
 document.write('<pre>'+(m[item]['is_in_stock'])+'</pre>')



})