formbuilder angular2

On the internet to find a lot of textbooks are not search for this part of the type, self-test to write the tutorial.Scenario Description: The project needs to use bootstrap, it is well known that Bootstrap has no time-date control, need to use a third-party control, I am afraid of how to use third-party controls in Angular2, my project uses ANGULAR-CLI build.Resolution 1: Configure Package.json to add a new dependency, then update to download the new

Why original: Hui Zhi networkAngular1.x obviously very successful, then, why do we have to turn violently to Angular2? Limitations of performanceAngularjs was originally an internal tool for designers to quickly build HTML forms. Over time, various features are added to suit the development of applications in different scenarios. However, due to the initial architectural constraints (such as bindings and templating mechanisms), performance improveme

#var-Local variablesSometimes different elements in the template may need to be called each other, and ANGULAR2 provides a simple syntax for mapping elements to local variables: Adding a property that begins with a # or var-, followed by a section representing the variable name, and an instance of the variable corresponding to the element.In the following code example, we define a local variable v_h1 for the element H1, which points to the DOM object

Angular's idea: always delegate data access to a supportive service class.Angular application: Use the Angular extension syntax to write HTML templates, use component classes to manage these templates, add application logic with services, and package publishing components and services with modules.We start the app by booting the root module. Angular takes over, displays the content of the app in the browser, and responds to the user's interactions based on the instructions we provide.Eight major

Reactive Extensions for Javascript was born a few years ago, and it will be recognized by more developers as the release of the official version of ANGULAR2. The core provided by RXJS is the observable object, which is a combination of asynchronous and event programming using an observable data sequence. A similar asynchronous programming model is that Promise,promise is an asynchronous model based on state change, which cannot be modified once the st

The path of iteration:June 12, the official version of Angularjs1.0.0 launched, the highlights function is basically complete, such as two-way binding, dependency injection, directives and so onAngularjs 1.3.x abandon support IE8 browser, launch single binding syntaxAngularjs 1.5.x adds a similar component writing experience, mainly to pave the transition ANGUALR2angularjs1.x shortcomings;Performance problems, angular is to use dirty check to achieve data update, when the page more and more data

Problem What to look for when using dependency injection What services are generally used to do What is the general use of directives? Angular2 How to extract public components Angular2 why not need to mention public components How to communicate between parent and child components When should I use Ngmodel? Why do you use typescript? I like JavaScript. Why do I have

1. ModularComponent-based programming is a trend in web development, and ANGULAR2 provides an efficient and simple way to develop components so that program development pays more attention to the implementation of business logic, without caring about how to load components and modules, how to reference and dependency injection implementations, and so on.As shown in the following code, ANGULAR2 provides anno

JQuery makes it easier to manipulate the DOM. Due to its ease of use and scalability, Jquer also quickly swept the world, a variety of plug-ins are also dizzying.I'm sure a lot of people don't go straight from jquery to the front, because it's so easy to use, and most of what we used to do is based on jquery and its plugins. And now Angular2 's component ecology is not perfect, we may want to use jquery when writing angular. This article provides a br

I know Angular2 's idea of using jquery might see a little bit of an odd lot of you, and we all know that ANGULAR2 is responsible for managing everything related to our view components and DOM elements, which sounds like a good idea, and a working corner made with another frame can be easily done.In other words, why would anyone want jquery and ANGULAR2 integrati

Today we are going to talk about the second part of the NG2 route, including the knowledge points of routing nesting, routing life cycle, and so on.ExampleThe example is still an example of the previous lesson:Last lesson, we explained the Hero list, this lesson we explain the crisis center.Source:Https://github.com/lewis617/angular2-tutorial/tree/gh-pages/routerHow to run:Run under the root directory:Http-serverRouting NestingWe defined the routing U

A module in ANGULAR2 refers to a class that is decorated with @ngmodule. @NgModule use a metadata object to tell angular how to compile and run the code. A module can contain components, directives, pipelines, and can declare their access rights public so that the components of the external module can access and use them. module is used to organize the application, through the module mechanism external class library can be very convenient to extend t

Resolution 1: Configure Package.json to add a new dependency, then update to download the new library "jquery": "*", "tether": "*", "bootstrap": "*", "moment": "*", " Eonasdan-bootstrap-datetimepicker ":" * "2: Configure Angular-cli.json" Styles ": ["]. /node_modules/bootstrap/dist/css/bootstrap.min.css ",". /node_modules/eonasdan-bootstrap-datetimepicker/build/css/bootstrap-datetimepicker.min.css "," Styles.css "]," Scripts ": ["]. /node_modules/jquery/dist/jquery.min.js ",". /node_modules/teth

It wasn't until a year ago that I didn't think I'd write a book, until two or three years ago I wouldn't have thought of putting my spare time on a writing (technical blog). At the beginning, I just wanted to summarize the problems I encountered in my work and publish them in my blog for future reference. Do not want to get everyone's approval, so more intentions to maintain, update their blog.Recently joined the new project team is responsible for front-end technology pre-research and selection

Learn how to create a custom validator to check whether passwords match.H1>Password matchH1>formnovalidate AutoComplete= "Off"[Formgroup]= "Signupform"> Divclass= "Form-field"> label>Password:label> inputtype= "text"Formcontrolname= "Password"[(Ngmodel)]= "Signup.password"name= "Password"> Div> Divclass= "Form-field"> label>Confirm Password:label> inputtype= "text"Formcontrolname= "Confirm"[(Ngmodel)]= "Signup.confirm"name= "Confrim">Div>form> this. Signupform = fb.group ({

By learning these concepts, you can simply describe a tab button for an option feature:Data:1. Arrays:Instantiate a class of an array, if you want to use the data in this class, you need to use a public property in the component to storm the class such as heroes=heroes;Const Array Name heroes: Data structure in array =[]Command instructions1.*ngfor= "Let value of Arr/json" ==> {{value}}2. (click) = function name (parameter)Module template syntax for angular: https://www.angular.cn/docs/ts/latest

-of]= "items" #item = "" #i = "index">2 [{{i+1}}] {{item}} 3 Now the resulting results are more disciplined:1 2 3 Grammar sugarSimilar to Ngif, ANGULAR2 also provides two syntactic sugars for ngfor:1 // using template attribute 2 template= "ng-for #item of items; #i =index">...3// Use the * prefix 4 *ng-for= "#item of items; #i =index">...There is no doubt that you should try to use *ng-for 's simple notation, which can improve the readability of

Angular2: about * ngFor nested loop, angular2ngfor The data obtained in the project development should be traversed cyclically. However, in ng2, it seems that the Object cannot be traversed directly. datas: any = [ { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24"}, { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "1233", returnNum: "24"}, { num: 1, date: "2017-04-12", sellNum: "1231234", sellMpney: "

ANGULAR2 has two of the more useful upload files of the third-party library, one is ng2-file-upload , one is ng2-uploader . ng2-uploaderis a lightweight upload file support library, the function is weak, but ng2-file-upload is a feature more comprehensive upload file support library. Here ng2-file-upload is the main introduction of the use.The following are described in the Mac OS operating system.1. InstallationInstall with NPM. To open terminal in t

return an array of routing links. The router will eventually parse the array into a URL and a component view. We can also add a routerlinkactive directive to Appcomponent templates Template: ' 6. Router Status At the end of each navigation lifecycle, the router builds a activatedroute tree that represents the current state of the router. We can access the current Routerstate value in any application using the router service and its routerstate properties. 7.router_directives