"@uirouter/core/src/vanilla/injector" | @uirouter/angular
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External module "@uirouter/core/src/vanilla/injector"




Const $injector

$injector: $InjectorLike = {/** Gets an object from DI based on a string token */get: (name) => globals[name],/** Returns true if an object named `name` exists in global DI */has: (name) => $injector.get(name) != null,/*** Injects a function** @param fn the function to inject* @param context the function's `this` binding* @param locals An object with additional DI tokens and values, such as `{ someToken: { foo: 1 } }`*/invoke: (fn: IInjectable, context?, locals?) => {const all = extend({}, globals, locals || {});const params = $injector.annotate(fn);const ensureExist = assertPredicate((key: string) => all.hasOwnProperty(key),(key) => `DI can't find injectable: '${key}'`);const args = params.filter(ensureExist).map((x) => all[x]);if (isFunction(fn)) return fn.apply(context, args);else return (fn as any[]).slice(-1)[0].apply(context, args);},/*** Returns a function's dependencies** Analyzes a function (or array) and returns an array of DI tokens that the function requires.* @return an array of `string`s*/annotate: (fn: IInjectable): any[] => {if (!isInjectable(fn)) throw new Error(`Not an injectable function: ${fn}`);if (fn && (fn as any).$inject) return (fn as any).$inject;if (isArray(fn)) return fn.slice(0, -1);const fnStr = fn.toString().replace(STRIP_COMMENTS, '');const result = fnStr.slice(fnStr.indexOf('(') + 1, fnStr.indexOf(')')).match(ARGUMENT_NAMES);return result || [];},} as $InjectorLike

A basic angular1-like injector api

This object implements four methods similar to the angular 1 dependency injector

UI-Router evolved from an angular 1 library to a framework agnostic library. However, some of the @uirouter/core code uses these ng1 style APIs to support ng1 style dependency injection.

This object provides a naive implementation of a globally scoped dependency injection system. It supports the following DI approaches:

Function parameter names

A function's .toString() is called, and the parameter names are parsed. This only works when the parameter names aren't "mangled" by a minifier such as UglifyJS.

function injectedFunction(FooService, BarService) {
  // FooService and BarService are injected

Function annotation

A function may be annotated with an array of dependency names as the $inject property.

injectedFunction.$inject = [ 'FooService', 'BarService' ];
function injectedFunction(fs, bs) {
  // FooService and BarService are injected as fs and bs parameters

Array notation

An array provides the names of the dependencies to inject (as strings). The function is the last element of the array.

[ 'FooService', 'BarService', function (fs, bs) {
  // FooService and BarService are injected as fs and bs parameters

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