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1.0.4 • Public • Published

This package has moved to @taylorgrinn/router

Tygr Router


Forking Guide

This is a react router hook built with sass.

The router layout will share as much html as it can between the different routes, allowing for smooth transitions.


  • Simple API
    Only one function, only one sass mixin, very basic router config interface

  • Limit DOM mutations
    The most expensive part of any javascript framework is updating the DOM. This library instead compiles all possible routes to a css file. Instead of adding and removing elements, the css file will hide and show them as needed. The only DOM manipulation that occurs during a route change is a single attribute in the top most element of the router.

  • Smaller build for small projects
    The javascript footprint is trivial; most of the logic is in the generated css file. The largest factor to the size of the css is the max depth rather than the number of routes:

    # of routes depth css (gzipped)
    1 1 116 B
    20 1 398 B
    100 1 1596 KB
    20 2 702 B
    20 3 1312 B
    20 4 2440 B
    20 5 4476 B
    Demo project 4 3967 B
  • Specify complex route logic for elements for more reuse
    The relative, partial, and exclusionary syntax can be used together to shorten jsx templates considerably. You can reuse the same component for multiple routes because no components are ever actually gone when the route changes.

  • Specify routes in child react components without global state
    Which elements show up on which routes can be specified at any depth of react components without having to import anything and without knowing anything about the current route.


  • A react application built with node (webpack, rollup, babel)
  • Sass compiler

See the demo/webpack.config.js file for an example of using react and sass with webpack. The package.json has the babel config.


npm i --save-dev @tygr/router json2scss-map-webpack-importer

Step 1: Define your router

The router needs to be defined exactly the same for your sass code and javascript. The easiest way to do that is to use the json2scss-map-webpack-importer package and define your router in a separate file that can be loaded by both sass and javascript. You can see an example of this in the demo folder.

The name of the router json file will be the name of the variable imported into sass.


property required type description
baseUrl optional string The base path of your website. If your website is hosted on domain.com/my-site, you should use '/my-site' as the baseUrl
fallback optional string This is the route that will be displayed if no other route matches the current url. Defaults to the baseUrl
pages required (Page or string) array The pages you want to show.

Pages can be specified by a string or by using the following interface


property required type description
path required string The name of the route
redirectTo optional relative or absolute path If a user reaches this page, they will be redirected to the redirectTo url.
children optional (Page or string) array Any children pages that this page has

Here is an example router config:

module.exports = {
  fallback: "/404",
  pages: [
    "/", // Home page
      path: "/page-2",
      children: {
      path: "/redirect",
      redirectTo: "/page-2/child-2", // Could also relative path: 'page-2/child-2'

Step 2: use the router hook in your component

import React from 'react';
import useRouter from '@tygr/Router';
import { router as routerConfig } from './router';

export default function App() {
  const [routerContainer, goto, currentRoute] = useRouter(routerConfig);

  return (
    <div {...routerContainer} className="router">

The useRouter hook takes an config object that matches the interface described in step 1. This should match the one used in the router mixin in step 3. It returns a router container object and a function to set the current route, as well as the current route as a string.

Spread the router container object returned from the useRouter hook over the parent element of the router as shown above.

Step 3: use the router sass mixin

@use '@tygr/router';
@import 'router.js'; // Import the router you defined in step 1

.router {
  @include router.router($router);

The router sass mixin takes in a config object that matches the interface described in step 1. This should match the one used in the useRouter hook in step 2. You should always enclose this mixin within a selector, just like above, because it makes use of the sass parent selector: &. The selector must target the same element that you spread the router container object over in step 2.

Step 4: hide and show routes conditionally using data-route

<span data-route="/register">Only shown on register page</span>

<span data-route="/login /register">Shown on login and register pages</span>

For elements you want to conditionally show or hide, add the data-route attribute with a list of the absolute routes you would like it to show up under.

Step 5: Use the goto function to change routes

<button onClick={goto('/login')}>Goto login</button>

Use the goto higher order function returned from the useRouter hook in order to change routes on button click.

You may also use relative routes for goto, but keep in mind that it is relative to the current route. You probably only want to display a relative button on certain pages:

  <button data-route="/parent" onClick={goto('page-1/child-1')}>
    Goto /parent/page-1/child-1

  <button data-route="/parent/page-1" onClick={goto('./page-2')}>
    Goto /parent/page-2

  <button data-route="/parent/page-1/child-1" onClick={goto('../page-2')}>
    Goto /parent/page-2

Optional syntaxes

In addition to the absolute paths, you can use these operators in the data-route attribute to handle more complex logic

name usage description
exclusionary !/route display an element on all paths that don't match /route.
partial ^/route display an element on all paths that begin with '/route'
partial exclusion !^/route Show on all routes that don't start with '/route'
relative route (no forward slash) Use the nearest parent data-route attribute and append this route to it when determining whether to display the element. Useful for avoiding typing long paths
relative exclusion !route Same as exclusionary, but prepend nearest parent data-route when determining whether to display the element
partial relative ^route Same as partial, but prepend nearest parent data-route when determining whether to display the element
partial relative exclusion !^route Same as partial exclusion, but prepend nearest parent data-route when determining whether to display the element.

Exclusionary syntax [!]

<span data-route="!/login !/reset-password">
  Show on any route except /login and /reset-password

By using the ! operator, you can exclude an element from a certain route rather than the default additive behavior.

This syntax takes precedence: if a single route is specified with !, any absolute routes that are also specified for that element will be ignored.

Partial syntax [^]

<span data-route="^/route">Display on all routes that start with /route</span>

The partial syntax only works on full path tokens. What that means is that ^/route will not match /routeeee but will match /route/eee

This syntax can be combined with other partial routes or absolute paths in a single data-route attribute. You can also combine the partial and exclusionary syntax [!^]:

<span data-route="!^/route">
  Display on all routes that do not start with /route

Relative syntax

<div data-route="^/some/long/route">
  <span data-route="child1">Child 1</span>
  <span data-route="/some/long/route/child1">Equivalent, but more verbose</span>

If you are using a partial syntax to display child routes, any child of that element can piggy back off the route specified by the parent rather than having to specify a full absolute path.

You can use any of the other syntaxes in conjunction with relative routes:

<div data-route="^/parent">
  <span data-route="^child">Display when route begins with /parent/child</span>
  <span data-route="!other-child">
    Display when route begins with /parent and does not include other-child
  <span data-route="!^child">
    Display when route begins with /parent but does not begin with /parent/child

The partial syntax is recursive: grandchildren can use the path of their parent partial data-route attribute.

<div data-route="^/parent">
  <div data-route="^child">
    <span data-route="grandchild">
      Display when route is /parent/child/grandchild
    <span data-route="/parent/child/grandchild">
      Equivalent, but more verbose

Just remember that the top level element in this pattern must always use an absolute partial path.

Use custom css for route transitions

By default, an element with the data-route attribute for conditional rendering is given the display: none and pointer-events: none css properties when the route is not active.

You may replace that logic with your own by passing content to the router mixin:

Using transitions

@import '@tygr/router';
@import 'router.js';

.router {
  [data-route] {
    transition: opacity 1s;

  @include router.router($router) {
    * These styles are applied when the data-route
    * attribute *DOES NOT* match the current route
    opacity: 0;

Using animations

@import '@tygr/router';
@import 'router.js';

.router {
  [data-route] {
    animation: _fade-in 1s;

  @include router.router($router) {
    animation: _fade-out 1s forwards;

@keyframes _fade-in {
  from {
    opacity: 0;
  to {
    opacity: 1;

@keyframes _fade-out {
  to {
    opacity: 0;

Specify styles for a specific route using the routeChild mixin

@import '@tygr/router';
@import 'router.js';

.router {
  @include router.router($router);

.green {
  @include router.routeChild('/some/route', 'some/other/route') {
    // These styles are applied when the specified route(s) are active
    color: green;

The routeChild mixin takes in any number of absolute routes and applies styles to the parent selector when those routes are active. The targeted element does not need to use the data-auth attribute.

Specify inactive styles for specific elements

By using the sass parent selector &, you can specify different behavior for a route depending on any css selector:

@import '@tygr/router';
@import 'router.js';

.fade {
  transition: opacity 1s;

.router {
  @include router.router($router) {
    display: none;
    pointer-events: none;

    &.fade {
      // Override behavior
      display: unset;
      pointer-events: unset;
      // Alternatively you can wrap above styles in a `&:not(.fade)` selector)

       * If an element has the fade class and data-route attribute, it will fade
       * out rather than dissapear when inactive
      opacity: 0;



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  • tygrinn
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