docx-js/src/file/document/body/section-properties/properties/column.ts

import { twipsMeasureValue } from "file/values";
import { XmlAttributeComponent, XmlComponent } from "file/xml-components";

export interface IColumnAttributes {
    readonly width: number | string;
    readonly space?: number | string;
}

export class ColumnAttributes extends XmlAttributeComponent<IColumnAttributes> {
    protected readonly xmlKeys = {
        width: "w:w",
        space: "w:space",
    };
}

export class Column extends XmlComponent {
    constructor({ width, space }: IColumnAttributes) {
        super("w:col");
        this.root.push(
            new ColumnAttributes({
                width: twipsMeasureValue(width),
                space: space === undefined ? undefined : twipsMeasureValue(space),
            }),
        );
    }
}