JSFiddle - React, Tailwind, and code Playground

JavaScript

var img = '<img ',
    obj = { src : 'img.jpg', title: 'foo' };

for (var prop in obj) {
  if (obj.hasOwnProperty(prop)) {
    img += prop + '=' + '"' + obj[prop] + '" ';
  }
}

img += ' />';

alert(img);