Split Array Data in Javascript

Question

I have a array data store in $data_major like this:

[
  ["5fa89bd5bb94930eb0940ccd"],
  ["60125363204fa64124db067f","6012522d204fa64124db065a"],
  ["6107d271fb82cf0ce6a2d940"],
  ["60125279204fa64124db0667","601252e0204fa64124db0674","60125ac207a14b4464dd9bf2"],
  ["6012606ed6e287465dc6316a","60125346204fa64124db067d"],
  ["5fa89bd0bb94930eb0940ccc","60125530204fa64124db06a1","60125ab407a14b4464dd9bf1"],
  ["60125714204fa64124db06d6"],
  ["6107d271fb82cf0ce6a2d940"],
  ["5fa89bb4bb94930eb0940cc9","5fa89bc5bb94930eb0940cca"],
  ["60125305204fa64124db0679","6012531a204fa64124db067c"],
  ["60125f3e9ab498457d5742ef","60125230204fa64124db065b","601257cf204fa64124db06e9"],
  ["60125305204fa64124db0679","6012531a204fa64124db067c"],
  ["6107d271fb82cf0ce6a2d940"],
  ["5fa89bd0bb94930eb0940ccc","601258a5bb1321433cfb3268"],
  ["6012531a204fa64124db067c","60125305204fa64124db0679","60125315204fa64124db067b"],
  ["60125305204fa64124db0679"],
  ["5fa89bb4bb94930eb0940cc9","5fa89bc5bb94930eb0940cca"],
  ["610ac04afb82cf0ce6a2d9af","601258d3bb1321433cfb326e"]
]

How to explode them into one array, for example:

["610ac04afb82cf0ce6a2d9af","610ac04afb82cf0ce6a2d9af","610ac04afb82cf0ce6a2d9af",...etc]

Thank before