One of common concerns I faced in web/frontend development is libraries like “Angularjs, Bootstrap, JQuery… etc..” loading time, and how that affect on website performance, when you need to load several libraries to your website/page.. specially with low internet speed connections

AngularJS is a huge framework with that already has many performance enhancements built in, but they can’t solve all our problems. No matter how fast the framework, we can all create sluggish code through bad practices and not understanding key concepts that help it perform well.  

<div>
    Number Of Clicks <span data-bind="text: numberOfClicks"></span> times
    <button data-bind="click: clickMe">Click me</button>
</div>
 
<script type="text/javascript">
    var viewModel = {
        numberOfClicks : ko.observable(0),
        clickMe: function() {
            var previousCount = this.numberOfClicks();
            this.numberOfClicks(previousCount + 1);
        }
    };
</script>

<ul data-bind="foreach: places">
    <li>
        <span data-bind="text: $data"></span>
        <button data-bind="click: $parent.removePlace">Remove</button>
    </li>
</ul>
 
 <script type="text/javascript">
     function MyViewModel() {
         var self = this;
         self.places = ko.observableArray(['Tehran', 'Esfahan', 'Shiraz']);
 
         self.removePlace = function(place) {
             self.places.remove(place)
         }
     }
     ko.applyBindings(new MyViewModel());
</script>

import { NgModule } from "@angular/core";
import { CommonModule } from "@angular/common";
import { BsDropdownModule } from "ngx-bootstrap/dropdown";
import { TooltipModule } from "ngx-bootstrap/tooltip";
import { ModalModule } from "ngx-bootstrap/modal";

@NgModule({
  imports: [
    CommonModule,
    BsDropdownModule.forRoot(),
    TooltipModule.forRoot(),
    ModalModule.forRoot()
  ],
  exports: [
    BsDropdownModule,
    TooltipModule,
    ModalModule
  ]
})
export class SharedBootstrapModule { }

import { SharedBootstrapModule } from './shared/shared.bootstrap.module';
@NgModule({
  imports: [BrowserModule, SharedBootstrapModule],
  // ...
})
export class AppModule {}

import { SharedBootstrapModule } from "./shared.bootstrap.module";

@NgModule({
  imports: [
    CommonModule,
    SharedBootstrapModule
  ],
  exports: [
    CommonModule,
    SharedBootstrapModule
  ]
})

import { Component, OnInit, TemplateRef } from "@angular/core";
import { BsModalRef, BsModalService } from "ngx-bootstrap";

@Component({
  selector: "app-modal-dialog-test",
  templateUrl: "./modal-dialog-test.component.html",
  styleUrls: ["./modal-dialog-test.component.css"]
})
export class ModalDialogTestComponent implements OnInit {

  modalRef: BsModalRef;

  constructor(private modalService: BsModalService) { }

  openModal(template: TemplateRef<any>) {
    this.modalRef = this.modalService.show(template,
      { animated: true, keyboard: true, backdrop: true, ignoreBackdropClick: false });
  }

  closeModal() {
    this.modalRef.hide();
  }
}

<h1>Displaying modal bootstrap dialogs</h1>

<button type="button" class="btn btn-info" (click)="openModal(template1)">Create template modal</button>

<ng-template #template1>
  <div class="modal-header">
    <h4 class="modal-title pull-left">Modal</h4>
    <button type="button" class="close pull-right" aria-label="Close" (click)="closeModal()">
      <span aria-hidden="true">&times;</span>
    </button>
  </div>
  <div class="modal-body">
    This is a modal.
  </div>
</ng-template>

 ng g c Shared/ConfirmModal --skip-import

import { ConfirmModalComponent } from "./confirm-modal/confirm-modal.component";

@NgModule({
  imports: [
  ],
  entryComponents: [
    ConfirmModalComponent
  ],
  declarations: [
    ConfirmModalComponent
  ]
})
export class SharedModule {}

import { Component } from "@angular/core";

@Component({
  selector: "app-confirm-modal",
  templateUrl: "./confirm-modal.component.html",
  styleUrls: ["./confirm-modal.component.css"]
})
export class ConfirmModalComponent {

  args: {
    title: string;
    message: string;
  };

  close: (val?: any) => void;

}

<div class="modal-header">
  <h4 class="modal-title pull-left">{{ args?.title }}</h4>
  <button type="button" class="close pull-right" aria-label="Close" (click)="close()">
    <span aria-hidden="true">&times;</span>
  </button>
</div>
<div class="modal-body">
  <p>{{ args?.message }}</p>
</div>
<div class="modal-footer">
  <button class="btn btn-danger" (click)="close(true)">Yes</button>
  <button class="btn btn-primary" (click)="close()">Cancel</button>
</div>

 >ng g s Core/Modal

import { Injectable } from "@angular/core";
import { BsModalService } from "ngx-bootstrap";

@Injectable()
export class ModalService {

  constructor(private bsModalService: BsModalService) { }

  show(component: any, args?: any, options?: any): Promise<any> {
    return new Promise(resolve => {
      options = options || {};
      const modal = this.bsModalService.show(component, options);
      let result: any;
      const sub = this.bsModalService.onHidden.subscribe(() => {
        sub.unsubscribe();
        resolve(result);
      });
      modal.content.args = args;
      modal.content.close = (val?: any) => {
        result = val;
        modal.hide();
      };
    });
  }
}

import { ModalService } from "./modal.service";

@NgModule({
  providers: [
    ModalService
  ]
})
export class CoreModule {}

<button type="button" class="btn btn-danger" (click)="deleteRecord()">Delete record</button>
<div *ngIf="confirmResult" class="alert alert-info">{{confirmResult}}</div>

import { ModalService } from "./../../core/modal.service";
import { ConfirmModalComponent } from "./../../shared/confirm-modal/confirm-modal.component";

export class ModalDialogTestComponent implements OnInit {

  confirmResult: string;

  constructor(private modalService: ModalService) { }

  deleteRecord() {
    this.confirmResult = "";
    this.modalService.show(
      ConfirmModalComponent,
      {
        title: "Confirm", message: "Do you want to delete this record?"
      },
      {
        animated: true, keyboard: true, backdrop: true, ignoreBackdropClick: false
      }).then(confirmed => {
        if (confirmed) {
          this.confirmResult = "Deleted!";
        } else {
          this.confirmResult = "Canceled!";
        }
      });
  }
}

1. ASP.NET on OSX and Linux
2. No More Web Forms
3. No More Visual Basic
4. Tag Helpers
5. View Components
6. GruntJS, NPM, and Bower Support
7. Unified MVC and Web API Controllers
8. AngularJS
9. ASP.NET Dependency Injection Framework
10. xUnit.net 

   <div data-role= "content" >
<p>سلام من محتوای اولین برنامه هستم</p>
</div>

   <div data-role= "content" ng-view="" > </div>

Data binding is a powerful technique for developing UIs: It makes it easier to separate view logic from business logic, and easier to test the resulting code.