Method removeFormat

packages/quill/src/core/editor.ts:255–271

(index: number, length: number)

  }

  removeFormat(index: number, length: number): Delta {
    const text = this.getText(index, length);
    const [line, offset] = this.scroll.line(index + length);
    let suffixLength = 0;
    let suffix = new Delta();
    if (line != null) {
      suffixLength = line.length() - offset;
      suffix = line
        .delta()
        .slice(offset, offset + suffixLength - 1)
        .insert('\n');
    }
    const contents = this.getContents(index, length + suffixLength);
    const diff = contents.diff(new Delta().insert(text).concat(suffix));
    const delta = new Delta().retain(index).concat(diff);
    return this.applyDelta(delta);
  }

  update(
    change: Delta | null,