Angular2 Error: No base href set. Please provide a value for the APP_BASE_HREF token or add a base element to the document.

This is a very common error for Angular2 beginners, if you are reading this it’s probably because you’re using the RouterModule module for the first time, you’ve done everything right but when you run your application you see something like this on your firebug:

core.umd.js:3462 EXCEPTION: No base href set. Please provide a value for the APP_BASE_HREF token or add a base element to the document.ErrorHandler.handleError @ core.umd.js:3462(anonymous function) @ core.umd.js:6860ZoneDelegate.invoke @ zone.js:192onInvoke @ core.umd.js:6242ZoneDelegate.invoke @ zone.js:191Zone.run @ zone.js:85(anonymous function) @ zone.js:451ZoneDelegate.invokeTask @ zone.js:225onInvokeTask @ core.umd.js:6233ZoneDelegate.invokeTask @ zone.js:224Zone.runTask @ zone.js:125drainMicroTaskQueue @ zone.js:357ZoneTask.invoke @ zone.js:297
core.umd.js:3467 ORIGINAL STACKTRACE:ErrorHandler.handleError @ core.umd.js:3467(anonymous function) @ core.umd.js:6860ZoneDelegate.invoke @ zone.js:192onInvoke @ core.umd.js:6242ZoneDelegate.invoke @ zone.js:191Zone.run @ zone.js:85(anonymous function) @ zone.js:451ZoneDelegate.invokeTask @ zone.js:225onInvokeTask @ core.umd.js:6233ZoneDelegate.invokeTask @ zone.js:224Zone.runTask @ zone.js:125drainMicroTaskQueue @ zone.js:357ZoneTask.invoke @ zone.js:297
core.umd.js:3468 Error: No base href set. Please provide a value for the APP_BASE_HREF token or add a base element to the document.
    at new PathLocationStrategy (common.umd.js:669)
    at provideLocationStrategy (router.umd.js:3602)
    at NgModuleInjector.get (AppModule.ngfactory.js:125)
    at NgModuleInjector.get (AppModule.ngfactory.js:130)
    at NgModuleInjector.get (AppModule.ngfactory.js:167)
    at NgModuleInjector.get (AppModule.ngfactory.js:177)
    at NgModuleInjector.AppModuleInjector.getInternal (AppModule.ngfactory.js:235)
    at NgModuleInjector.get (core.umd.js:7221)
    at ApplicationRef_._loadComponent (core.umd.js:7070)
    at ApplicationRef_.bootstrap (core.umd.js:7058)ErrorHandler.handleError @ core.umd.js:3468(anonymous function) @ core.umd.js:6860ZoneDelegate.invoke @ zone.js:192onInvoke @ core.umd.js:6242ZoneDelegate.invoke @ zone.js:191Zone.run @ zone.js:85(anonymous function) @ zone.js:451ZoneDelegate.invokeTask @ zone.js:225onInvokeTask @ core.umd.js:6233ZoneDelegate.invokeTask @ zone.js:224Zone.runTask @ zone.js:125drainMicroTaskQueue @ zone.js:357ZoneTask.invoke @ zone.js:297
zone.js:344 Unhandled Promise rejection: No base href set. Please provide a value for the APP_BASE_HREF token or add a base element to the document. ; Zone: <root> ; Task: Promise.then ; Value: Error: No base href set. Please provide a value for the APP_BASE_HREF token or add a base element to the document.() Error: No base href set. Please provide a value for the APP_BASE_HREF token or add a base element to the document.
    at new PathLocationStrategy (http://localhost:3000/node_modules/@angular/common/bundles/common.umd.js:669:23)
    at provideLocationStrategy (http://localhost:3000/node_modules/@angular/router/bundles/router.umd.js:3602:13)
    at NgModuleInjector.get (AppModule.ngfactory.js:125:77)
    at NgModuleInjector.get (AppModule.ngfactory.js:130:84)
    at NgModuleInjector.get (AppModule.ngfactory.js:167:151)
    at NgModuleInjector.get (AppModule.ngfactory.js:177:132)
    at NgModuleInjector.AppModuleInjector.getInternal (AppModule.ngfactory.js:235:66)
    at NgModuleInjector.get (http://localhost:3000/node_modules/@angular/core/bundles/core.umd.js:7221:31)
    at ApplicationRef_._loadComponent (http://localhost:3000/node_modules/@angular/core/bundles/core.umd.js:7070:44)
    at ApplicationRef_.bootstrap (http://localhost:3000/node_modules/@angular/core/bundles/core.umd.js:7058:18)
zone.js:346 Error: Uncaught (in promise): Error: No base href set. Please provide a value for the APP_BASE_HREF token or add a base element to the document.()

Lucky for you this problem is very easy to solve, you just have to go to your index.html and add the following line on the head:

<head>
  <base href="/">
  ...
</head>

There, problem solved!!

Recommended for you

Angular2: How to Sort a JSON Dataset by Field To be able to sort an array we don't need anything specific from angular2, it can be accomplished just by using regular javascript, more specifically, we have to use the function sort() from the Array object, let's see an example: someArray.sort(function(a, b){ if ( a.someField < b.someFi...
Angular2 Tutorial: Detecting Clicks Outside the Component Angular2 click detection Sometimes there is a need to detect whether the user is clicking inside or outside our angular2 component, specially if your component has a dropdown element, in this case you need to know exactly where the click occurred in order to perform the right action. In this tut...
Interacting with Child Components in Angular2 There are lots of situations where we have to divide a component into several sub-components, resulting in a parent with N child components that somehow have to interact with the parent, like for example a menu component like this: In this case the menu-componen...
Integrating an Angular2 app with a PHP app In this tutorial I'm going to show you how to use Angular2 Http client to communicate with an php application. I don't want this to be a very long post, so I'm going to make everything as simple as possible. The first step, of course, is to provide a php web service, it doesn't need to be anythin...

4 comments on “Angular2 Error: No base href set. Please provide a value for the APP_BASE_HREF token or add a base element to the document.

  1. Ayz Pat

    Invalid route configuration of route ‘/': path cannot start with a slash

    This is the error i get while using href=”/”

  2. Joey

    Not just put it in the head section, but it needs to be the first tag in the head section. Mine was 4th and was throwing that error until I moved it 1st.

Leave a Reply

Your email address will not be published. Required fields are marked *

Obs: Use the tag <pre lang="LANGUAGE"> to include code blocks to your comment.
Example: <pre lang="javascript"> console.log('Test'); </pre>