code: function paddingElementForTransform(proper, arr) {
      //RN not support multi font-family keywords
      if (proper === 'font-family') {
          return [proper, arr.pop()]
      }
      //not support such shorthand
      if (proper === 'background') {
          return ['background-color', arr.join(" ")]
      }
      //not support such shorthand
      if (proper === 'border-bottom' || proper === 'border-top' || proper === 'border-right' || proper === 'border-left') {
          // console.warn("not support property",proper)
          return []
      }
      //content property should take just single value
      if (proper === 'content' && arr.length === 1)
          return [proper, arr[0]]
      return [proper, arr.join(" ")]
  }
docs: do some padding modification,to produce more stable run-time environment
  @param proper
  @param arr
  @return {*}