正则表达式将JSON属性值包装在另一个字符串中

Question

{ "url": "products/Sensors.html",
  "thumbnailUrl":"/images/icons/no_image.png",
  "translatedTitle": "sensors",
  ...
},
...

我想将附加值“localhost：8080”添加到属性“thumbnailUrl”，以.png | jpg等结尾

替换值应为：

{ "url": "products/Sensors.html",
  "thumbnailUrl":"localhost:8080/images/icons/no_image.png",
  "translatedTitle": "sensors",
  ...
}

Answer 1

为什么不这样做     Myobj.thumbnailUrl =＆＃34; localhost：8080＆＃34; + myobj.thumbnailUrl;

否则     Mynewstring = myexistingstring.replace（/（thumbnailUrl \＆＃34;：\＆＃34;）/，＆＃39; $ 1＆＃39; +＆＃39; localhost：8080＆＃39;）;