Method _splitChunk

src/MagicString.ts:1205–1228

@internal

(chunk: Chunk, index: number)

  /** @internal */
  _splitChunk(chunk: Chunk, index: number): true {
    if (chunk.edited && chunk.content.length) {
      // zero-length edited chunks are a special case (overlapping replacements)
      const loc = getLocator(this.original)(index)
      throw new MagicStringError(
        `cannot split a chunk that has already been edited (${loc.line}:${loc.column} – "${chunk.original}")`,
      )
    }

    const newChunk = chunk.split(index)

    this.byEnd.set(index, chunk)
    this.byStart.set(index, newChunk)
    this.byEnd.set(newChunk.end, newChunk)

    if (chunk === this.lastChunk)
      this.lastChunk = newChunk

    this.lastSearchedChunk = chunk
    /* v8 ignore next 2 -- DEBUG is always true in tests */
    if (DEBUG)
      this.stats.timeEnd('_split')
    return true
  }

  /**
   * Returns the generated string.