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@angular/common

package

Implements fundamental Angular framework functionality, including directives and pipes, location services used in routing, HTTP services, localization support, and so on.

The CommonModule exports are re-exported by BrowserModule, which is included automatically in the root AppModule when you create a new app with the CLI new command.

Entry points

Primary

@angular/common

Implements fundamental Angular framework functionality, including directives and pipes, location services used in routing, HTTP services, localization support, and so on.

Secondary

`@angular/common/http`	Implements an HTTP client API for Angular apps that relies on the `XMLHttpRequest` interface exposed by browsers.
`@angular/common/http/testing`	Supplies a testing module for the Angular HTTP subsystem.
`@angular/common/testing`	Supplies infrastructure for testing functionality supplied by `@angular/common`.
`@angular/common/upgrade`	Provides tools for upgrading from the `$location` service provided in AngularJS to Angular's unified location service.

Primary entry point exports

NgModules

CommonModule

Exports all the basic Angular directives and pipes, such as NgIf, NgForOf, DecimalPipe, and so on. Re-exported by BrowserModule, which is included automatically in the root AppModule when you create a new app with the CLI new command.

Classes

`HashLocationStrategy`	A `LocationStrategy` used to configure the `Location` service to represent its state in the hash fragment of the browser's URL.
`Location`	A service that applications can use to interact with a browser's URL.
`LocationStrategy`	Enables the `Location` service to read route state from the browser's URL. Angular provides two strategies: `HashLocationStrategy` and `PathLocationStrategy`.
`NgForOfContext`
`NgIfContext`
`NgLocaleLocalization`	Returns the plural case based on the locale
`NgLocalization`
`PathLocationStrategy`	A `LocationStrategy` used to configure the `Location` service to represent its state in the path of the browser's URL.
`PlatformLocation`	This class should not be used directly by an application developer. Instead, use `Location`.
`ViewportScroller`	Defines a scroll position manager. Implemented by `BrowserViewportScroller`.

Functions

`formatCurrency`	Formats a number as currency using locale rules.
`formatDate`	Formats a date according to locale rules.
`formatNumber`	Formats a number as text, with group sizing, separator, and other parameters based on the locale.
`formatPercent`	Formats a number as a percentage according to locale rules.
`getCurrencySymbol`	Retrieves the currency symbol for a given currency code.
`getLocaleCurrencyCode`	Retrieves the default currency code for the given locale.
`getLocaleCurrencyName`	Retrieves the name of the currency for the main country corresponding to a given locale. For example, 'US Dollar' for `en-US`.
`getLocaleCurrencySymbol`	Retrieves the symbol used to represent the currency for the main country corresponding to a given locale. For example, '$' for `en-US`.
`getLocaleDateFormat`	Retrieves a localized date-value formating string.
`getLocaleDateTimeFormat`	Retrieves a localized date-time formatting string.
`getLocaleDayNames`	Retrieves days of the week for the given locale, using the Gregorian calendar.
`getLocaleDayPeriods`	Retrieves day period strings for the given locale.
`getLocaleDirection`	Retrieves the writing direction of a specified locale
`getLocaleEraNames`	Retrieves Gregorian-calendar eras for the given locale.
`getLocaleExtraDayPeriodRules`	Retrieves locale-specific rules used to determine which day period to use when more than one period is defined for a locale.
`getLocaleExtraDayPeriods`	Retrieves locale-specific day periods, which indicate roughly how a day is broken up in different languages. For example, for `en-US`, periods are morning, noon, afternoon, evening, and midnight.
`getLocaleFirstDayOfWeek`	Retrieves the first day of the week for the given locale.
`getLocaleId`	Retrieves the locale ID from the currently loaded locale. The loaded locale could be, for example, a global one rather than a regional one.
`getLocaleMonthNames`	Retrieves months of the year for the given locale, using the Gregorian calendar.
`getLocaleNumberFormat`	Retrieves a number format for a given locale.
`getLocaleNumberSymbol`	Retrieves a localized number symbol that can be used to replace placeholders in number formats.
`getLocalePluralCase`	Retrieves the plural function used by ICU expressions to determine the plural case to use for a given locale.
`getLocaleTimeFormat`	Retrieves a localized time-value formatting string.
`getLocaleWeekEndRange`	Range of week days that are considered the week-end for the given locale.
`getNumberOfCurrencyDigits`	Reports the number of decimal digits for a given currency. The value depends upon the presence of cents in that particular currency.
`isPlatformBrowser`	Returns whether a platform id represents a browser platform.
`isPlatformServer`	Returns whether a platform id represents a server platform.
`isPlatformWorkerApp`	Returns whether a platform id represents a web worker app platform.
`isPlatformWorkerUi`	Returns whether a platform id represents a web worker UI platform.
`registerLocaleData`	Register global data to be used internally by Angular. See the "I18n guide" to know how to import additional locale data.

Structures

`FormStyle`	Context-dependant translation forms for strings. Typically the standalone version is for the nominative form of the word, and the format version is used for the genitive case.
`FormatWidth`	String widths available for date-time formats. The specific character widths are locale-specific. Examples are given for `en-US`.
`KeyValue`	A key value pair. Usually used to represent the key value pairs from a Map or Object.
`LocationChangeEvent`	A serializable version of the event from `onPopState` or `onHashChange`
`LocationChangeListener`
`NumberFormatStyle`	Format styles that can be used to represent numbers.
`NumberSymbol`	Symbols that can be used to replace placeholders in number patterns. Examples are based on `en-US` values.
`Plural`	Plurality cases used for translating plurals to different languages.
`PopStateEvent`
`TranslationWidth`	String widths available for translations. The specific character widths are locale-specific. Examples are given for the word "Sunday" in English.
`WeekDay`	The value for each day of the week, based on the `en-US` locale

Directives

`NgClass`	Adds and removes CSS classes on an HTML element.
`NgComponentOutlet`	Instantiates a single `Component` type and inserts its Host View into current View. `NgComponentOutlet` provides a declarative approach for dynamic component creation.
`NgForOf`	A structural directive that renders a template for each item in a collection. The directive is placed on an element, which becomes the parent of the cloned templates.
`NgIf`	A structural directive that conditionally includes a template based on the value of an expression coerced to Boolean. When the expression evaluates to true, Angular renders the template provided in a `then` clause, and when false or null, Angular renders the template provided in an optional `else` clause. The default template for the `else` clause is blank.
`NgPlural`	Adds / removes DOM sub-trees based on a numeric value. Tailored for pluralization.
`NgPluralCase`	Creates a view that will be added/removed from the parent `NgPlural` when the given expression matches the plural expression according to CLDR rules.
`NgStyle`	An attribute directive that updates styles for the containing HTML element. Sets one or more style properties, specified as colon-separated key-value pairs. The key is a style name, with an optional `.<unit>` suffix (such as 'top.px', 'font-style.em'). The value is an expression to be evaluated. The resulting non-null value, expressed in the given unit, is assigned to the given style property. If the result of evaluation is null, the corresponding style is removed.
`NgSwitch`	The `[ngSwitch]` directive on a container specifies an expression to match against. The expressions to match are provided by `ngSwitchCase` directives on views within the container. Every view that matches is rendered. If there are no matches, a view with the `ngSwitchDefault` directive is rendered. Elements within the `[NgSwitch]` statement but outside of any `NgSwitchCase` or `ngSwitchDefault` directive are preserved at the location.
`NgSwitchCase`	Provides a switch case expression to match against an enclosing `ngSwitch` expression. When the expressions match, the given `NgSwitchCase` template is rendered. If multiple match expressions match the switch expression value, all of them are displayed.
`NgSwitchDefault`	Creates a view that is rendered when no `NgSwitchCase` expressions match the `NgSwitch` expression. This statement should be the final case in an `NgSwitch`.
`NgTemplateOutlet`	Inserts an embedded view from a prepared `TemplateRef`.

Pipes

`AsyncPipe`	Unwraps a value from an asynchronous primitive.
`CurrencyPipe`	Transforms a number to a currency string, formatted according to locale rules that determine group sizing and separator, decimal-point character, and other locale-specific configurations.
`DatePipe`	Formats a date value according to locale rules.
`DecimalPipe`	Formats a value according to digit options and locale rules. Locale determines group sizing and separator, decimal point character, and other locale-specific configurations.
`I18nPluralPipe`	Maps a value to a string that pluralizes the value according to locale rules.
`I18nSelectPipe`	Generic selector that displays the string that matches the current value.
`JsonPipe`	Converts a value into its JSON-format representation. Useful for debugging.
`KeyValuePipe`	Transforms Object or Map into an array of key value pairs.
`LowerCasePipe`	Transforms text to all lower case.
`PercentPipe`	Transforms a number to a percentage string, formatted according to locale rules that determine group sizing and separator, decimal-point character, and other locale-specific configurations.
`SlicePipe`	Creates a new `Array` or `String` containing a subset (slice) of the elements.
`TitleCasePipe`	Transforms text to title case. Capitalizes the first letter of each word and transforms the rest of the word to lower case. Words are delimited by any whitespace character, such as a space, tab, or line-feed character.
`UpperCasePipe`	Transforms text to all upper case.

Types

`APP_BASE_HREF`	A predefined DI token for the base href to be used with the `PathLocationStrategy`. The base href is the URL prefix that should be preserved when generating and recognizing URLs.
`DOCUMENT`	A DI Token representing the main rendering context. In a browser this is the DOM Document.
`LOCATION_INITIALIZED`	Indicates when a location is initialized.
`Time`	Represents a time value with hours and minutes.