You can configure your router instance by passing options to the constructor or by using .setOption(optName, optValue).

var router = createRouter([], {
        allowNotFound: false,
        autoCleanUp: true,
        defaultRoute: 'home',
        defaultParams: {},
        queryParams: {
            arrayFormat: 'default',
            nullFormat: 'default',
            booleanFormat: 'default'
        },
        queryParamsMode: 'default',
        trailingSlashMode: 'default',
        strictTrailingSlash: false,
        caseSensitive: false
    })

Default route

When your router instance starts, it will navigate to a default route if such route is defined and if it cannot match the URL against a known route:

• defaultRoute: the default route.

• defaultParams: the default route params (defaults to {})

See navigation guide for more information.

Allow not found

There are two ways to deal with not found routes: the first one is to configure a defaultRoute (and defaultParams), the second one is to allow those not found routes to create a new routing state. Set allowNotFound to true and the router will emit a state value for unmatched paths.

For example, if you try to match /hello-world and you don't have this route defined, the router will emit the following state:

import { constants } from 'router5';
​
const state = {
    name: constants.UNKNOWN_ROUTE
    params: { path: '/hello-world' },
    path: '/hello-world'
}

Query parameters mode

Option queryParamsMode can take the following values:

• 'default': a path will match with any query parameters added, but when building, extra parameters won't appear in the returned path.

• 'strict': a path with query parameters which were not listed in node definition will cause a match to be unsuccessful. When building, extra parameters won't appear in the returned path.

• 'loose': a path will match with any query parameters added, and when building, extra parameters will appear in the returned path.

Query parameters formatting

You can specify how array, boolean and null values are formatted in query parameters, and how they are matched.

• arrayFormat: Specifies how arrays should be stringified

  • 'none' (default): no brackets or indexes are added to query parameter names ('role=member&role=admin')

  • 'brackets: brackets are added to query parameter names ('role[]=member&role[]=admin')

  • 'index': brackets and indexes are added to query parameter names ('role[0]=member&role[1]=admin')

• booleanFormat: specifies how boolean values are stringified and parsed

  • 'none' (default): booleans are stringified to strings ('istrue=true&isfalse=false')

  • 'empty-true': same as 'none' except true values are stringified without value ('istrue&isfalse=false'). If you choose this boolean format, make sure to change the value of 'nullFormat'.

  • 'string': same as 'none' but 'true' and 'false' are parsed as booleans

  • 'unicode': true and false are displayed with unicode characters, and parsed as booleans ('istrue=✓&isfalse=✗')

• nullFormat: specifies how null values are stringified and parsed

  • 'default' (default): null values are stringified without equal sign and value ('isnull')

  • 'string': null values are stringified to 'null' ('isnull=null') and parsed as null values

  • 'hidden': null values are not stringified

Trailing slash mode

Option trailingSlashMode can take the following values:

• 'default': building follows path definitions

• 'never': when building, trailing slash is removed

• 'always': when building, trailing slash is added

Strict trailing slash

By default, the router is not in "strict match" mode. If you want trailing slashes to not be optional, you can set strictTailingSlash to `true``.

Automatic clean up

If autoCleanUp is set to true, the router will automatically clear canDeactivate functions / booleans when their associated segment becomes inactive.

Case sensitivity

By default, matching of routes is case insensitive. You can set caseSensitive to true if you want to change that behaviour.