Method [kDeleteLeft]

lib/internal/readline/interface.js:808–820

()

  }

  [kDeleteLeft]() {
    if (this.cursor > 0 && this.line.length > 0) {
      this[kBeforeEdit](this.line, this.cursor);
      // The number of UTF-16 units comprising the character to the left
      const charSize = charLengthLeft(this.line, this.cursor);
      this.line =
        StringPrototypeSlice(this.line, 0, this.cursor - charSize) +
        StringPrototypeSlice(this.line, this.cursor, this.line.length);

      this.cursor -= charSize;
      this[kRefreshLine]();
    }
  }

  [kDeleteRight]() {
    if (this.cursor < this.line.length) {