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What you will learn in Pro Angular 16

by Adam Freeman

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Chapter by chapter

Concepts explained in this book

• component templateAn Angular component template is an HTML-based view definition associated with a component, containing Angular expressions and bindings that define rendered content.
• template variableA template reference variable is an Angular template variable that refers to a template element or directive instance.
• union typeA union type is a TypeScript type that permits a value to belong to one of several specified types.
• property bindingA property binding is Angular template syntax that assigns the result of an expression to a property of the object representing a host element.
• data sourceA data source is a component that supplies application data independently of where that data originates.
• componentA component is a modular application building block that encapsulates a portion of user-interface structure and behavior.
• serviceAn Angular service is a class that provides reusable application functionality and can be supplied through dependency injection.
• Angular moduleA feature module is an Angular module that groups the components, services, and dependencies associated with a particular application feature.
• routingRouter is the Angular service that performs programmatic navigation among application routes.
• any typeThe TypeScript any type permits a value to have any type and largely disables static type checking for that value.
• web formAn HTML form is a document element that groups interactive controls for collecting and submitting user-entered data.
• ngFor bindingngFor is Angular's built-in structural directive that repeats an HTML element for each item in an iterable collection.
• validationData validation is the process of checking input data against specified rules for correctness, completeness, or acceptability.
• FormControlFormControl is an Angular class that represents an individual form control's value, validation state, and interaction state.
• dependency injectionDependency injection is a technique in which a framework supplies an object's required dependencies rather than the object constructing them directly.
• routing configurationA routing configuration is a set of rules that maps URLs to components or other navigation outcomes in an Angular application.
• two-way bindingTwo-way data binding is a technique that synchronizes changes between application data and its user-interface representation in both directions.
• declarations propertyThe declarations property is Angular module metadata listing the components, directives, and pipes belonging to an Angular module.
• signalAn Angular signal is a reactive value abstraction that represents data and tracks relationships so dependent values can update efficiently when the data changes.
• directiveAn Angular directive is a class or construct that changes the behavior or presentation of an HTML element to which it is applied.
• data bindingData binding is a technique that connects application data with a user-interface representation so changes can be reflected between them.
• micro-templateA micro-template directive is an Angular directive whose shorthand syntax expands into an embedded template representation.
• event bindingAn event binding is Angular template syntax that associates a user-interface event with an expression or component method.
• type hintsA type annotation is explicit syntax that declares the type or permitted types of a variable or other program element.
• moduleA module is a self-contained software unit that groups related functionality and can be incorporated into an application.
• AngularAngular development tools build Angular applications and provide a local server for testing them in a browser.
• ActivatedRouteSnapshotActivatedRouteSnapshot is an Angular class representing the state of an activated route at a particular point during navigation, including captured parameters.
• route guardA route guard is an Angular service or class that controls whether navigation to a route or loading of a route module may proceed.
• truthinessA truthy value is a JavaScript value that evaluates as true in a Boolean context.
• component decoratorThe Angular component decorator attaches component metadata to a class so Angular can treat it as a component.
• selector propertyAn Angular directive selector is metadata that specifies which elements or attributes cause a directive to be applied.
• shadow hostA host element is the HTML element affected by an Angular binding through changes to its appearance, content, or behavior.
• ngSubmitAn ngSubmit binding is Angular template syntax that invokes an expression or component method when a form is submitted.
• TypeScript compilerThe TypeScript compiler checks TypeScript source and emits JavaScript output without retaining TypeScript-only type annotations in the generated JavaScript.
• hydrationRehydration is the process of attaching client-side application behavior to server-generated HTML after the JavaScript required to run that behavior has downloaded.
• template expressionAn Angular template expression is a fragment of code evaluated against component context whose value contributes to a binding or rendered content.
• structural directiveA structural directive is an Angular directive that changes the rendered document structure by creating, removing, or repeating template content.
• computed signalThe computed function is an Angular API function that creates a read-only signal from a derivation function whose signal reads establish its dependencies.
• injectable decoratorThe injectable decorator is an Angular decorator that marks a class for use as an injectable service.
• providers propertyThe providers property of Angular module metadata lists services and other objects made available through Angular dependency injection.
• class bindingA special class binding is Angular syntax that independently controls whether a named CSS class is present on an element.
• ngClassngClass is an Angular directive that manages CSS class memberships on an element from a bound expression.
• form apiThe reactive forms API is Angular's programming interface for representing and managing forms through explicit form-control objects and model-driven state.
• import statementAn import statement is JavaScript or TypeScript syntax that declares a dependency on another module and makes its exported declarations available in the current module.
• change detectionChange detection is Angular's process for detecting changes in application state and updating affected views.
• data modelA data model is a representation of the entities, properties, and relationships in an application's domain.
• Angular MaterialAngular Material is a library of UI components and styles for Angular applications that implements Material Design principles.
• indexingAn array index is a numeric position used to access an element in an array.
• route resolverA route resolver is an Angular routing mechanism that performs prerequisite work, such as loading data, before navigation completes.
• external templateAn external template is an Angular component template stored in a separate HTML file from the component class.
• JavaScriptJavaScript is a programming language commonly used to implement behavior in web pages and client-side applications.
• nullish coalescing operatorThe nullish coalescing operator returns its right operand only when its left operand is null or undefined.
• MinLength attributeA minlength validator is an Angular form validator that marks a control invalid when its string value is shorter than a specified minimum length.
• formarrayFormArray is an Angular forms class that represents an ordered collection of form controls and manages their values and state by array position.
• observableAn observable is a reactive abstraction representing a sequence of values that can be emitted asynchronously over time.
• unidirectional data pipelineOne-way data binding is a technique in which data flows from an application value or source to a user-interface representation in a single direction.
• ngDoCheckngDoCheck is an Angular component lifecycle method that runs during change detection to support custom checking of state changes.
• trackBytrackBy is an Angular ngFor configuration that identifies equivalent items by the result of a comparison function.
• constructor methodA constructor is a class member that initializes an instance when the class is instantiated.
• ng serveng serve is an Angular CLI command that builds an Angular application and serves it through a development server.
• pipeA built-in Angular pipe is a pipe implementation provided by Angular for common data-transformation and formatting tasks.
• impure pipeAn impure pipe is an Angular pipe whose transform method may be called during every change-detection cycle because its output can change independently of its input reference.
• content projectionContent projection is an Angular technique that inserts content from a component's host element into the component's template.
• ng-contentng-content is Angular template syntax that marks where a component's host-element content is projected into its template.
• eventA browser event is an object representing an occurrence that can provide information to event handlers about the occurrence and its source.
• as operatorA type assertion is TypeScript syntax that tells the compiler to treat an expression as a specified type without changing the runtime value.
• routerLink directiverouterLink is an Angular directive that associates an HTML element with a navigation route and navigates when the element is activated.
• bundlingBundling is the process of consolidating compiled application modules and their resources into distributable files.
• imports propertyThe imports property is Angular module metadata containing the modules whose exported features are available to an Angular module.
• pure pipeThe pure decorator property is Angular pipe metadata that specifies whether a pipe runs only when its input or arguments change or on every change-detection cycle.
• repository patternA repository is an abstraction that mediates access to data while hiding how that data is obtained from application components.
• route parameterA route parameter is a value supplied through a URL at runtime and made available to the route's navigation or component logic.
• root moduleA root module is the Angular module that describes an application to Angular, including its required modules, providers, declarations, and root component configuration.
• code reloadingHot reload is a development technique that updates a running application after source changes without requiring a full restart.
• text boxHTMLInputElement is the DOM interface representing an HTML input element and exposing its input-specific properties and behavior.
• ngOnChangesngOnChanges is an Angular lifecycle hook method invoked before initialization and whenever a directive or component input property changes.
• angular compilerThe Angular compiler transforms Angular application source and templates into executable browser-oriented output.
• root componentA root component is the top-level Angular component responsible for managing the content presented at the application’s root element.
• ng-template elementAn ng-template element is an Angular template element that defines content for deferred or repeated instantiation without itself being rendered as an HTML element.
• collection modificationA collection-level data change is an addition, removal, or replacement of an object within a collection.
• forEachAddedItemforEachAddedItem is an Angular iterable-changes method that invokes a callback for each item added to a collection.
• forEachRemovedItemforEachRemovedItem is an Angular iterable-changes method that invokes a callback for each item removed from a collection.
• IterableChangeRecordIterableChangeRecord is an Angular data object describing an item and its positional or identity change in an iterable collection.
• IterableChangesIterableChanges is an Angular API object containing the records and operations needed to process changes detected in an iterable collection.
• IterableDifferIterableDiffer is an Angular API object that compares an iterable collection with its previous state and reports changes.
• IterableDiffer.diffIterableDiffer.diff is an Angular API method that compares a collection and returns its detected changes or null when none exist.
• IterableDifferFactoryIterableDifferFactory is an Angular API class that creates an iterable differ for a supported collection.
• IterableDiffersIterableDiffers is an Angular service that locates factories capable of comparing iterable collections for changes.
• trackByIdtrackById is an Angular iterable-change-record property containing the identity value used to associate a collection item with its view.
• ViewRefViewRef is an Angular API object representing an embedded view that can be managed by a view container.
• runtime errorA runtime error is a failure that occurs while a program is executing rather than while its source is being compiled.
• angular.jsonangular.json is the Angular workspace configuration file that defines project settings and command configurations.
• canActivateChild methodThe canActivateChild method is a guard method that determines whether a child route may be activated.
• canDeactivate methodThe canDeactivate method is a guard method that determines whether a component may be deactivated during navigation.
• canDeactivate propertyThe canDeactivate property is Angular route configuration that associates a route with one or more deactivation guards.
• child route guardA child route guard is a guard that controls activation of the child routes belonging to a parent route.
• mapToCanActivatemapToCanActivate is an Angular function that converts classes defining canActivate into functional route guards.
• mapToCanActivateChildmapToCanActivateChild is an Angular function that converts classes defining canActivateChild into functional child-route guards.
• route deactivation guardA route deactivation guard is an Angular guard that determines whether the currently displayed component may be left during navigation.
• RouterStateSnapshotRouterStateSnapshot is an Angular route-information object that represents the router state for a navigation, including its URL.
• unsaved editsUnsaved edits are modifications to application data that have not yet been persisted.
• validation ruleA validation rule is a condition that input data must satisfy to be considered valid.
• errors propertyThe errors property is an Angular form-control property that contains details of the validation failures currently affecting the control.
• ngControlngControl is an Angular directive that registers an HTML form control with Angular's form validation system.
• pattern attributeThe pattern attribute is an HTML form-control attribute that requires entered text to match a specified regular expression pattern.
• validation stateValidation state is the current condition of form data relative to the validation rules applied to it.
• square bracket binding syntaxSquare bracket binding syntax is Angular template notation that marks a binding as one-way and supplies an evaluated expression to its target.
• createComponentcreateComponent is a ViewContainerRef method that creates an Angular component dynamically at a view-container location.
• WritableSignal<T>A writable signal is an Angular signal whose value can be changed directly through writable operations.
• ngModelngModel is an Angular directive that binds a form control's value to an application model.
• inputAn input property is a directive or component property that receives a value from a template binding.
• packageA package is a distributable software unit containing code and metadata that can be installed as a dependency.
• TypeScriptTypeScript is a statically typed programming language that extends JavaScript with additional language features and compiles to JavaScript.
• matCellDefThe matCellDef directive marks an Angular Material table template element as defining the contents of a data cell.
• output propertyAn output property is a directive or component property that exposes an event through which it can emit values to its parent template.
• server-side renderingServer-side rendering is the technique of executing an application on a server to generate HTML that is sent to a browser before client-side code is ready.
• providerA class provider is Angular dependency-injection configuration that maps a token to a class implementation.
• BootstrapBootstrap is an open-source front-end library providing CSS styles and interface components for responsive web pages and applications.
• view containerA view container is an Angular-managed location that holds and manages a collection of rendered views.
• data conversionType coercion is the implicit conversion of a value from one data type to another during an operation or comparison.
• equalityThe JavaScript identity operator compares operands without type coercion and requires their values and types to match.
• conditional logicAn if/else statement conditionally selects one of two alternative blocks of code.
• logical ORThe logical OR operator is a JavaScript operator that returns its left operand when truthy and otherwise returns its right operand.
• Number functionThe Number function converts its argument to a JavaScript numeric value.
• operator precedenceOperator precedence is the rule determining the order in which operators in an expression are evaluated.
• optional chainingThe optional chaining operator conditionally accesses a property or invokes a method, yielding undefined when the preceding value is null or undefined.
• styles bundleA styles bundle is a generated JavaScript bundle containing the stylesheets and code needed to apply application styles in the browser.
• templateUrl propertyThe templateUrl property is component metadata specifying the file that contains a component's template.
• WebpackWebpack is a JavaScript module bundler that analyzes module dependencies and produces bundles for application delivery.
• value propertyThe value property is the DOM property containing the current value of a form control such as an input element.
• testA unit test is an individual test that checks the behavior of an isolated software unit.
• private memberThe private keyword restricts a class member's access to the class that defines it.
• NgFormNgForm is an Angular directive and form controller that tracks an HTML form's controls, values, and validation state.
• arrow functionAn arrow function is JavaScript function syntax with lexical this binding and a concise expression form.
• context objectA context object is an object whose properties provide values available to bindings in an instantiated Angular template.
• input eventInputEvent is a DOM event interface describing an input-related change to editable or form-control content.
• classA JavaScript class is a language construct that defines the structure and behavior of objects and provides a basis for creating instances.
• methodA method is a function defined as part of a class or object and invoked through that class or object.
• stringA string is a JavaScript primitive value representing a sequence of characters.
• createEmbeddedViewcreateEmbeddedView is an Angular view-container operation that instantiates an embedded view from a template and context object.
• TemplateRefTemplateRef is an Angular object representing a template that can be instantiated as one or more embedded views.
• ViewContainerRefViewContainerRef is an Angular class that provides operations for creating, inserting, removing, and managing views in a view container.
• mat-table attributeThe Angular Material table component is an Angular UI component for rendering tabular data with configurable columns, headers, and rows.
• npm scriptThe scripts section is the package.json field containing named command definitions that a package manager can execute.
• bindToComponentInputsbindToComponentInputs is an Angular router configuration option that enables route values to be assigned to component input properties.
• optional segmentAn optional route parameter is a route value that may be included in a URL to provide additional information without being required for the route to function.
• URL matrix notationURL matrix notation is a URL convention that represents optional parameter values as semicolon-separated name-value pairs within a path segment.
• prerenderingPrerendering is the generation of an application's HTML documents before they are sent to browsers, before client-side JavaScript executes.
• Angular applicationAn Angular application is a web application built with the Angular framework.
• invalid propertyThe invalid property of an Angular form or control indicates whether its current value fails one or more validators.
• development dependencyThe devDependencies property is an npm manifest field listing packages required during development but excluded from the finished application.
• @HostBindingA host binding is an Angular binding that connects a directive or component value to a property, attribute, class, or style of its host element.
• matHeaderCellDefThe matHeaderCellDef directive marks an Angular Material table template element as defining the contents of a header cell.
• lintingA linter is a static-analysis tool that examines source code for programming errors, style violations, and other rule-defined issues.
• color paletteA color palette is a defined collection of colors from which interface colors are selected.
• FormGroupFormGroup is an Angular reactive-forms class that aggregates named form controls and exposes their combined value and status.
• web serviceA web service is a network-accessible software service that provides data or operations to clients through web protocols.
• package managerA package manager is software that resolves, downloads, installs, and manages software packages and their dependencies.
• even valueAn even value is a boolean contextual value indicating whether an item occupies an even position in an Angular repeated sequence.
• paginationPagination is a technique for dividing a collection of results into separate pages or subsets for presentation or retrieval.
• differA differ is a change-comparison mechanism that detects additions, removals, or moves in a data structure.
• resolve methodA resolve method is a resolver operation that returns a synchronous value, observable, or promise whose completion controls route activation.
• resolve propertyThe resolve property is an Angular route configuration property that associates names with resolver functions whose results are obtained before route activation.
• authenticationAuthentication is the process of verifying the identity of a user or other entity requesting access to a system.
• entry pointAn entry point is the initial source module from which a build tool discovers an application's dependency graph.
• exports propertyThe exports property is Angular module metadata listing declarations or imported features made available to other Angular modules.
• http-server modulehttp-server is an npm package and command-line tool that serves static files over HTTP.
• direct navigationDirect navigation is entering or requesting an application URL directly rather than reaching it through in-application navigation.
• RouterModule.forChildRouterModule.forChild is an Angular API method that creates router configuration for routes declared by a feature module without providing the root routing service.
• CSSCSS is the stylesheet language used to describe the presentation of structured documents, including web pages.
• attributeAn object property is a named value or function associated with a JavaScript object.
• host listener@HostListener is an Angular decorator that binds a directive or component method to an event on its host element.
• TestBedTestBed is an Angular testing utility that configures a simulated application environment and creates objects for component tests.
• dynamically loaded moduleA dynamically loaded module is an application module whose code is loaded on demand when navigation reaches a route that requires it.
• read-only signalThe asReadonly method creates a read-only view of a writable Angular signal.
• dirty propertyng-dirty is an Angular CSS class applied to a form control after its value has been changed by the user.
• MVC modelA model class is a class that defines the structure and data properties of an entity in an application's data model.
• SassSCSS is a CSS-compatible stylesheet syntax that supports Sass features such as variables, functions, and nesting.
• mat-button directiveThe Angular Material button directive is a directive that applies Angular Material button styling and behavior to button or anchor elements.
• @NgModule decoratorThe @NgModule decorator attaches Angular module metadata to a class, including its declarations, imports, providers, and bootstrap configuration.
• UI libraryA component library is a reusable collection of user-interface components for application development.
• view encapsulationView encapsulation is Angular's mechanism for scoping component styles and, when applicable, rewriting their selectors to isolate them from other components.
• @Input decoratorThe @Input decorator marks a directive or component property as receiving a value from a template binding and can specify its attribute name.
• custom validator functionA custom validator is application-defined validation logic that determines whether form-control data satisfies a specified condition.
• HTTP clientHttpClient is an Angular service for making HTTP requests and receiving asynchronous responses.
• optional function argumentAn optional parameter is a function parameter that may be omitted when the function is called.
• import/export syntaxAn export statement is JavaScript or TypeScript module syntax that makes declarations available to importing modules, including through re-exported modules.
• localeA locale setting is an application configuration that determines locale-sensitive formatting conventions such as number punctuation and currency-symbol placement.
• implicit valueThe $implicit property is the default value property on an Angular template context object for a structural directive.
• attribute directiveAn attribute directive is an Angular directive that changes the behavior or presentation of an existing HTML element without changing the document structure.
• child routeA child route is a route defined as a descendant of another route in a nested Angular routing configuration.
• router-outletrouter-outlet is an Angular directive element that marks where the component for the current route is rendered.
• subscribeThe subscribe method registers callbacks or an observer with an observable to receive notifications for emitted values and other sequence events.
• ComponentFixtureComponentFixture is an Angular testing API object that provides access to a component instance, its rendered view, and change-detection operations.
• mat-sort-headerThe mat-sort-header attribute makes a table header participate in Angular Material sorting.
• mat-text-columnA mat-text-column element is an Angular Material table element that displays a data property as an unmodified text column.
• matColumnDefThe matColumnDef attribute identifies an Angular Material table column definition applied to a container of header and data cells.
• MatPaginatorMatPaginator is an Angular Material component that displays controls for navigating through paginated data.
• matSortMatSort is an Angular Material directive that manages sorting state and behavior for sortable table data.
• row templateA row template is a table template that specifies which configured column names are rendered in a row.
• HTTP methodAn HTTP method is a standardized operation verb in HTTP that specifies the intended action for a request.
• @angular/core@angular/core is the Angular package that provides foundational framework functionality, including component support.
• decoratorA decorator is a language construct that attaches metadata or behavior to a class or other declaration.
• typeof operatorThe typeof operator is a JavaScript operator that returns a string identifying the type of its operand.
• controls propertyThe controls property of an Angular form controller exposes an object containing the individual controls in the form.
• resetForm methodThe resetForm method resets an Angular form controller's validation state and returns the form to its original pristine state.
• validation summaryA validation summary is a collected display of validation error messages for multiple controls in a form.
• component isolationComponent isolation is the separation of Angular components that prevents one component from directly sharing objects with another component.
• shared resourceA shared object is an object instance made available to multiple application components so they can access common state or behavior.
• accessor methodA getter is a class or object member that computes and returns a value when accessed as a property.
• string interpolation bindingA string interpolation binding is Angular template syntax that evaluates an expression and inserts its result into an HTML element's text content.
• Document Object ModelThe DOM API is the browser programming interface for creating, reading, and modifying nodes in a document object model.
• RouterModuleRouterModule is the Angular module that provides router functionality and directives for Angular applications.
• ActivatedRouteActivatedRoute is an Angular service that exposes information about the currently activated route to a component.
• define-palette functionThe Angular Material Sass define-palette function creates a named palette by selecting hues and assigning semantic color roles.
• define-typography-config functionThe Angular Material Sass define-typography-config function creates a typography configuration map from named text styles.
• foreground and background palettesForeground and background palettes are theme color collections that define colors for interface content and surfaces, including disabled controls.
• get-color-from-palette functionThe get-color-from-palette function is an Angular Material Sass theming function that retrieves a color from a palette with an optional opacity value.
• :host selectorThe :host selector is a CSS selector that targets the host element of an Angular component.
• typography configurationA typography configuration is a mapping of text-style names to font settings used by Angular Material components.
• @use expressionA Sass @use expression loads a Sass module and makes its variables, functions, and other members accessible through a namespace.
• attribute bindingAn attribute binding is Angular template syntax that assigns a data-bound value to an element attribute.
• RESTREST is an architectural approach for designing web services around resources, URLs, and HTTP operations.
• mutate methodThe mutate method changes a writable Angular signal based on its current value.
• ViewChild decoratorThe ViewChild decorator is an Angular decorator that queries a component's view for a matching child element or component.
• static typingStatic typing is a language feature in which declared or inferred types are checked before program execution and incompatible assignments can produce compiler errors.
• platform detection serviceA platform detection service is an application service that exposes whether execution is occurring on a server or in a browser.
• isPlatformServerisPlatformServer is an Angular function that determines whether an application is running on a server platform.
• PLATFORM_IDPLATFORM_ID is an Angular dependency-injection token representing the identifier of the platform on which an application runs.
• static HTML representationA static HTML representation is an HTML rendering of an application that can be served without dynamically executing the application first.

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