Is there an easy method for extracting URL parameters in AngularJS?

Hello, I'm new to Angular and coming from a background in PHP and ASP. In those languages, we typically read parameters like this:

<html>
<head>
    <script type="text/javascript">
        var foo = <?php echo $_GET['foo']; ?>;
        var bar = <?php echo $_GET['bar']; ?>;

        $(document).ready(function() {
            alert('Foo is: ' + foo + ' and bar is: ' + bar);
        });
    </script>
<head>

I'm unfamiliar with client-side query parsing and wondering what the correct method is. I've tried Google searches and asked questions before without much success. My URLs usually look like this: example.com?foo=123&bar=456

Is the above syntax outdated? Should I switch to something like example.com/foo/123/bar/345 instead? I'm open to changing my URL structure for better compatibility with Angular, but I need some guidance on where to start. I've heard about ngRoute, but don't know how to begin. Is that the right way to go?

I appreciate any help or pointers you can offer.

Edit - using $location

I've attempted using $location but haven't had much luck. Here's the code:

angular.module('myApp')
    .controller('MyController', ['$location', MyController]);

function MyController($location) {
    var params = $location.search();

    alert('foo is: ' + params.foo + ' and bar is: ' + params.bar);
}

I've read about setting $locationProvider.html5Mode(true) for this kind of query parsing to work, but I haven't been successful with that either.

Answer №1

If you are utilizing html5 mode, it is possible to inject the $location service.

When using URLs without a base root (such as ! or #), it is necessary to explicitly include a <base> tag that establishes the "root" of your application OR configure $locationProvider to not mandate a base tag.

HTML:

<head>
  <base href="/">
  ...
</head>
<body>
    <div ng-controller="ParamsCtrl as vm">
        ...
    </div>
</body>

JS:

app.config(['$locationProvider', function($locationProvider){
    $locationProvider.html5Mode(true);

    // or

    $locationProvider.html5Mode({
        enabled: true,
        requireBase: false
    });    
}]);

app.controller("TestCtrl", ['$location', function($location) {
    var params = $location.search();
    alert('Foo is: ' + params.foo + ' and bar is: ' + params.bar);
});

It's important to mention that integrating a router library like ngRoute, ui-router, or the new component router can be beneficial. These routers operate based on a base route off of a symbol (! or #) and designate everything following the symbol as a client-side route managed by the router. This approach enables your Angular application to act as a Single Page App and grants access to $routeParams or an equivalent in ui-router.

Answer №2

To access query parameters in AngularJS, use the $location.search() method.

var params = $location.search();

console.log(params);
-> object {
    foo: foovalue,
    bar: barvalue
   }

You can then access these values using params.foo and params.bar.

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