Method clone

src/MagicString.ts:283–326

* Does what you'd expect.

()

   * Does what you'd expect.
   */
  clone(): this {
    const cloned = new MagicString(this.original, {
      filename: this.filename,
      ignoreList: this.ignoreList,
      offset: this.offset,
    })

    let originalChunk = this.firstChunk
    let clonedChunk = (cloned.firstChunk = cloned.lastSearchedChunk = originalChunk.clone())

    while (originalChunk) {
      cloned.byStart.set(clonedChunk.start, clonedChunk)
      cloned.byEnd.set(clonedChunk.end, clonedChunk)

      const nextOriginalChunk = originalChunk.next
      const nextClonedChunk = nextOriginalChunk && nextOriginalChunk.clone()

      if (nextClonedChunk) {
        clonedChunk.next = nextClonedChunk
        nextClonedChunk.previous = clonedChunk

        clonedChunk = nextClonedChunk
      }

      originalChunk = nextOriginalChunk
    }

    cloned.lastChunk = clonedChunk

    if (this.indentExclusionRanges) {
      cloned.indentExclusionRanges = this.indentExclusionRanges.slice() as
      | ExclusionRange
      | ExclusionRange[]
    }

    cloned.sourcemapLocations = new BitSet(this.sourcemapLocations)
    cloned.storedNames = { ...this.storedNames }

    cloned.intro = this.intro
    cloned.outro = this.outro
    cloned.hasMovedChunks = this.hasMovedChunks

    return cloned as this
  }

  /**
   * Generates a sourcemap object with raw mappings in array form, rather than encoded as a string.