Method appendLeft

src/MagicString.ts:224–250

* Appends the specified content at the index in the original string. * If a range *ending* with index is subsequently moved, the insert will be moved with it. * See also `s.prependLeft(...)`.

(index: number, content: string)

   * See also `s.prependLeft(...)`.
   */
  appendLeft(index: number, content: string): this {
    index = index + this.offset

    if (typeof content !== 'string') {
      throw new MagicStringError(`content must be a string, got ${typeof content}`)
    }

    /* v8 ignore next 2 -- DEBUG is always true in tests */
    if (DEBUG)
      this.stats.time('appendLeft')

    this._split(index)

    const chunk = this.byEnd.get(index)

    if (chunk) {
      chunk.appendLeft(content)
    }
    else {
      this.intro += content
    }

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

  /**
   * Appends the specified content at the index in the original string.