docx-js/src/file/paragraph/formatting/tab-stop.ts

// http://officeopenxml.com/WPtab.php
import { XmlAttributeComponent, XmlComponent } from "file/xml-components";

export class TabStop extends XmlComponent {

    constructor(tab: Tab) {
        super("w:tabs");
        this.root.push(tab);
    }
}

export type TabValue = "left" | "right" | "center" | "bar" | "clear" | "decimal" | "end" | "num" | "start";

export class TabAttributes extends XmlAttributeComponent<{val: TabValue, pos: string | number}> {
    protected xmlKeys = {val: "w:val", pos: "w:pos"};
}

export class Tab extends XmlComponent {

    constructor(value: TabValue, position: string | number) {
        super("w:tab");
        this.root.push(new TabAttributes({
            val: value,
            pos: position,
        }));
    }
}

export class MaxRightTabStop extends TabStop {
    constructor() {
        super(new Tab("right", 9026));
    }
}

export class LeftTabStop extends TabStop {
    constructor(position: number) {
        super(new Tab("left", position));
    }
}

export class RightTabStop extends TabStop {
    constructor(position: number) {
        super(new Tab("right", position));
    }
}

export class CenterTabStop extends TabStop {
    constructor(position: number) {
        super(new Tab("center", position));
    }
}