When bundling and shipping Vanilla JavaScript, often we require only specific modules to be specific pages. This could mean registering event handlers, times, basically everything that would panic when run in other pages.

DOM Router supports matching modules(functions, more specifically) against routes. It requires a route(either a string or a regular expression in string form) and a bootstrapping function.

The bootstrapping function could initialize timers, register event handlers and perform page specific operations.

Route

• Only exact matches are accepted. For example, if /foo is registered, only http://example.com/foo and not http://example.com/foo/bar

• Routes are normalized by removing trailing slash. So /foo is the same as /foo/

• Sometimes routes will have variable fields. These cases can be represented with a regular expression rule. For example, Reddit's subreddit route, www.reddit.com/r/<subreddit-name>), can be matched with /r/[A-Z,a-z,0-9]+/(assuming subreddit names are alphanumerical)

Bootstrapping function

This function will get executed when window.location.pathname matches the any one of the registered routes. Generally, this function should be used to set up register handlers, initialize timers, etc.

Example

import Router from 'vanilla-dom-router';

// Initialize router
const router = new Router();

const settingsRoute = '/settings';
const profileRoute = '/r/[A-Z,a-z,0-9]+/';

const settings = () => {
  let form = document.getElementById('form');
  const submit = () => {
    alert('Settings updated');
  };
  form.addEbentListener('submit', submit, true);
};

const profile = () => {
  let form = document.getElementById('form');
  const submit = () => {
    alert('profile updated');
  };
  form.addEbentListener('submit', submit, true);
};

router.register(settingsRoute, settings);
router.register(profileRoute, profile);

try {
  router.router();
} catch (e) {
  console.log(e);
}

In the wild

• see mCaptcha/mCaptcha