Function push

packages/server-renderer/src/render.ts:75–88

(item: SSRBufferItem)

      return buffer
    },
    push(item: SSRBufferItem): void {
      const isStringItem = isString(item)
      if (appendable && isStringItem) {
        buffer[buffer.length - 1] += item as string
        return
      }
      buffer.push(item)
      appendable = isStringItem
      if (isPromise(item) || (isArray(item) && item.hasAsync)) {
        // promise, or child buffer with async, mark as async.
        // this allows skipping unnecessary await ticks during unroll stage
        buffer.hasAsync = true
      }
    },
  }
}