overleaf/libraries/overleaf-editor-core/lib/file_data/range.js

class Range {
  /**
   * @param {number} pos 
   * @param {number} length 
   */
  constructor(pos, length) {
    this.pos = pos
    this.length = length
  }

  toRaw() {
    return {
      pos: this.pos,
      length: this.length
    }
  }

  static fromRaw(raw) {
    return new Range(raw.pos, raw.length)
  }
}

module.exports = Range