<div class="container">
        <header class="jumbotron mt-4">
            <div class="display-2 mb-4">Our Mission</div>
            <p class="lead">Wisdom Pet Medicine strives to blend the best in
                traditional and alternative medicine in the diagnosis and
                treatment of companion animals including dogs, cats, birds,
                reptiles, rodents, and fish. We apply the wisdom garnered in
                the centuries old tradition of veterinary medicine, to find the
                safest treatments and cures.</p>
        </header>

    <header class="jumbotron jumbotron-fluid">
        <div class="container">
            <div class="display-2 mb-4">Our Mission</div>
            <p class="lead">Wisdom Pet Medicine strives to blend the best in
                traditional and alternative medicine in the diagnosis and
                treatment of companion animals including dogs, cats, birds,
                reptiles, rodents, and fish. We apply the wisdom garnered in
                the centuries old tradition of veterinary medicine, to find the
                safest treatments and cures.</p>
        </div>
    </header>

<table class="table table-striped table-hover table-bordered table-responsive">
  <thead class="thead-light">

<tr class="bg-danger text-light">

<td class="table-success">$100.00 </td>

        <section class="card mb-5" id="drwinthrop">
            <div class="card-body">
                <img class="card-img img-fluid" src="images/testimonial-mcphersons.jpg"
                    alt="Doctor Winthrop Photo">
                <h2 class="card-title">Dr. Stanley Winthrop</h2>
                <h5 class="card-subtitle">Behaviorist</h5>
                <p class="card-text">Dr. Winthrop is the guardian of Missy, a
                    three-year old Llaso mix, who he adopted at the shelter.
                    Dr. Winthrop is passionate about spay and neuter and pet
                    adoption, and works tireless hours outside the clinic,
                    performing free spay and neuter surgeries for the shelter.</p>
                <a class="card-link" href="#">About Me</a>
                <a class="card-link" href="#">My Pets</a>
                <a class="card-link" href="#">Client Slideshow</a>
            </div>
        </section>

<section class="card mb-5 bg-primary text-light border-warning" id="drchase">

        <section class="card mb-5" id="drsanders">
            <div class="card-header">
                <h2 class="card-title">Dr. Kenneth Sanders</h2>
                <h5 class="card-subtitle">Nutritionist</h5>
            </div>
            <div class="card-body">
                <img class="card-img img-fluid" src="images/testimonial-mcphersons.jpg"
                    alt="Doctor Sanders Photo">
                <p class="card-text">Leroy walked into Dr. Sanders front door
                    when she was moving into a new house. After searching for
                    weeks for Leroy's guardians, she decided to make Leroy a
                    part of her pet family, and now has three cats.</p>
            </div>
            <div class="card-footer">
                <a class="card-link" href="#">About Me</a>
                <a class="card-link" href="#">My Pets</a>
                <a class="card-link" href="#">Client Slideshow</a>
            </div>
        </section>

        <section class="card mb-5" id="drwong">
            <div class="card-body">
                <img class="card-img img-fluid" src="images/testimonial-mcphersons.jpg"
                    alt="Doctor Wong Photo">
                <h2 class="card-title">Dr. Olivia Wong</h2>
                <h5 class="card-subtitle">Preventive Care</h5>
                <p class="card-text">Dr. Wong is a cancer survivor who was
                    fortunate enough to get to spend time with a therapy dog
                    during her recovery. She became passionate about therapy
                    animals, and has started her own foundation to train and
                    provide education to patients in recovery. Now she gets her
                    own dose of daily therapy from her husky, Lilla.</p>
            </div>
            <div class="list-group list-group-flush">
                <a class="list-group-item" href="#">About Me</a>
                <a class="list-group-item" href="#">My Pets</a>
                <a class="list-group-item" href="#">
                    Client Slideshow
                </a>
            </div>
        </section>

    <div class="container">
        <div class="card-group">

<body>
    <div class="container">
        <section class="media mb-5" id="drwinthrop">
            <img class="d-flex align-self-center img-fluid rounded mr-3" style="width:30%"
                src="images/testimonial-mcphersons.jpg" alt="Doctor Winthrop Photo">
            <div class="media-body">
                <h2>Dr. Stanley Winthrop</h2>
                <h5>Behaviorist</h5>
                <p>Dr. Winthrop is the guardian of Missy,
                    a three-year old Llaso mix, who he adopted at the
                    shelter. Dr. Winthrop is passionate about spay and neuter
                    and pet adoption, and works tireless hours outside the
                    clinic, performing free spay and neuter surgeries for the
                    shelter.</p>
        </section>
    </div>
</body>

@page "/js-sample"


<button class="btn btn-primary" onclick="JsFunctionHelper.invokeDotnetStaticFunction()">Invoke Static Method</button>

@code
{
    [JSInvokable]
    public static Task<string> HelpMessage()
    {
        return Task.FromResult("Help text from C# static function");
    }
}

window.JsFunctionHelper = {
  invokeDotnetStaticFunction: function () {
    DotNet.invokeMethodAsync("BlazorRazorSample.Client", "HelpMessage").then(
      (data) => {
        console.log(data);
      }
    );
  }
};

@page "/js-sample"
@implements IDisposable

@inject IJSRuntime jSRuntime

<button class="btn btn-primary" @onclick="CallInstanceMethod">Invoke Instance Method</button>

@code
{
    private DotNetObjectReference<JsSample> objectReference;

    [JSInvokable]
    public string GetAddress()
    {
        return "123 Main Street";
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if(firstRender)
        {
            objectReference = DotNetObjectReference.Create(this);
        }
    }

    private async Task CallInstanceMethod()
    {
        await jSRuntime.InvokeVoidAsync("JsFunctionHelper.invokeDotnetInstanceFunction", objectReference);
    }

    public void Dispose()
    {
        objectReference?.Dispose();
    }
}

window.JsFunctionHelper = {
  invokeDotnetInstanceFunction: function (addressProvider) {
    addressProvider.invokeMethodAsync("GetAddress").then((data) => {
      console.log(data);
    });
  }
};

    <div class="container">
        <h4 class="alert alert-info">
            فرم‌های بوت استرپ 3</h4>
        <div class="row">
            <article class="registrationform">
                <h2>
                    فرم ثبت نام</h2>               
                <form class="registration form-horizontal" action="#">
                <fieldset id="personalinfo">
                    <legend>اطلاعات شخصی</legend>
                    <section class="row">
                        <label class="col col-lg-4 control-label" for="myname">
                            نام</label>
                        <div class="controls">
                            <input class="col col-lg-8" type="text" name="myname" 
                                   id="myname" autofocus placeholder="نام و نام خانوادگی"
                                   required>
                        </div>
                        <!-- controls -->
                    </section><!-- row -->
                    <section class="row">
                        <label class="col col-lg-4 control-label" for="companyname">
                            نام شرکت</label>
                        <div class="controls">
                            <input class="col col-lg-8" type="text" name="companybname" id="companyname" />
                        </div>
                        <!-- controls -->
                    </section><!-- row -->
                    <section class="row">
                        <label class="col col-lg-4 control-label" for="myemail">
                            ایمیل</label>
                        <div class="controls">
                            <input class="col col-lg-8" type="email" name="myemail" id="myemail" 
                                   required autocomplete="off" />
                        </div>
                        <!-- controls -->
                    </section><!-- row -->
                </fieldset>
                <!-- personal info -->
                <fieldset id="otherinfo">
                    <legend>سایر اطلاعات</legend>
                    <section class="row">
                        <label class="col col-lg-4 control-label">
                            نوع درخواست</label>
                        <div class="controls col col-lg-8">
                            <label class="radio">
                                <input type="radio" name="requesttype" value="question" />
                                سؤال
                            </label>
                            <label class="radio">
                                <input type="radio" name="requesttype" value="comment" />
                                انتقاد
                            </label>
                        </div>
                        <!-- controls -->
                    </section><!-- row -->
                    <section class="row">
                        <label class="col col-lg-4 control-label">
                            خبرنامه</label>
                        <div class="controls col col-lg-8">
                            <label class="checkbox">
                                <input type="checkbox" id="subscribe" name="subscribe" checked value="yes" />
                               آیا مایل به دریافت ایمیل‌های خبرنامه ما هستید؟
                            </label>
                        </div>
                        <!-- controls -->
                    </section><!-- row -->
                    <section class="row">
                        <label class="col col-lg-4 control-label" for="reference">
                            چطور از وجود سایت ما آگاه شدید؟</label>
                        <div class="controls col col-lg-8">
                            <select name="reference" id="reference">
                                <option>لطفا انتخاب کنید...</option>
                                <option value="friend">از طریق یک دوست</option>
                                <option value="facebook">Facebook</option>
                                <option value="twitter">Twitter</option>
                            </select>
                        </div>
                        <!-- controls -->
                    </section><!-- row -->
                </fieldset>
                <button class="btn" type="submit">
                    ارسال</button>
                </form>
            </article>
        </div>
        <!-- end row -->
    </div>
    <!-- /container -->

export class ShowHtmlComponent {
  htmlContent = "Template <script>alert(\"Hello!\")</script> <b>Syntax</b>";
}

<h3>Binding innerHTML</h3>
<p>Bound value:</p>
<p>{{htmlContent}}</p>

 WARNING: sanitizing HTML stripped some content (see http://g.co/ng/security#xss).

<p>Result of binding to innerHTML:</p>
<p [innerHTML]="htmlContent"></p>

<p #dataContainer></p>

export class ShowHtmlComponent implements OnInit {

  @ViewChild("dataContainer") dataContainer: ElementRef;

  ngOnInit() {
    this.dataContainer.nativeElement.innerHTML = "nativeElement <script>alert(\"Hello!\")</script> <b>Syntax</b>";
  }
}

export class ShowHtmlComponent implements OnInit {
  sanitizedHtml: string;

  constructor(private sanitizer: DomSanitizer) { }

  ngOnInit() {
    this.sanitizedHtml = this.sanitizer.sanitize(SecurityContext.HTML, "<b>Sanitize</b><script>attackerCode()</script>");
  }
}

SecurityContext.NONE
SecurityContext.HTML
SecurityContext.STYLE
SecurityContext.SCRIPT
SecurityContext.URL
SecurityContext.RESOURCE_URL

export enum SecurityContext { NONE, HTML, STYLE, SCRIPT, URL, RESOURCE_URL }

export abstract class DomSanitizer implements Sanitizer {
  abstract sanitize(context: SecurityContext, value: SafeValue|string|null): string|null;
  abstract bypassSecurityTrustHtml(value: string): SafeHtml;
  abstract bypassSecurityTrustStyle(value: string): SafeStyle;
  abstract bypassSecurityTrustScript(value: string): SafeScript;
  abstract bypassSecurityTrustUrl(value: string): SafeUrl;
  abstract bypassSecurityTrustResourceUrl(value: string): SafeResourceUrl;
}

import { Pipe, PipeTransform } from "@angular/core";
import { DomSanitizer, SafeHtml, SafeResourceUrl, SafeScript, SafeStyle, SafeUrl } from "@angular/platform-browser";

@Pipe({
  name: "safe"
})
export class SafePipe implements PipeTransform {
  constructor(protected sanitizer: DomSanitizer) { }

  public transform(value: any, type: string): SafeHtml | SafeStyle | SafeScript | SafeUrl | SafeResourceUrl {
    switch (type) {
      case "html":
        return this.sanitizer.bypassSecurityTrustHtml(value);
      case "style":
        return this.sanitizer.bypassSecurityTrustStyle(value);
      case "script":
        return this.sanitizer.bypassSecurityTrustScript(value);
      case "url":
        return this.sanitizer.bypassSecurityTrustUrl(value);
      case "resourceUrl":
        return this.sanitizer.bypassSecurityTrustResourceUrl(value);
      default:
        throw new Error(`Invalid safe type specified: ${type}`);
    }
  }
}

@NgModule({
  imports: [
  // ...
  ],
  declarations: [ SafePipe]
})

<p [innerHTML]="htmlContent | safe: 'html'"></p>

• M-V-VM چیست؟

• آشنایی با اجزای مختلف الگوی M-V-VM

• مزایای استفاده از الگوی M-V-VM

• اصول کاری و بایدها و نبایدهای الگوی M-V-VM

• بایدها و نبایدهای یک View

• بایدها و نبایدهای ViewModel

• بایدها و نبایدهای Model

• مروری بر معایب الگوی M-V-VM

برای مدیریت بهتر کامپوننت‌ها جهت استفاده مجدد از آنها بهتر است ورودی‌های کامپوننت را اعتبارسنجی کنیم. این ورودی‌ها چه برای استفاده داخلی کامپوننت، یا جهت مشخص کردن وضعیت آن، بر رفتار کامپوننت تاثیر زیادی دارند. React مجموعه‌ای از اعتبار سنجی‌ها را دارد که میشود به کامپوننت اضافه کرد. باید توجه داشته باشیم که پیام‌های خطای این اعتبارسنجی‌ها فقط در حالت Development Mode قابل استفاده هستند. به زبان ساده اگر از react.min.js استفاده کنید، پیام‌های خطا را نخواهید دید. باید فایل‌ها را به نوع react.js تبدیل کنید. اعتبارسنجی React در زمان توسعه و برای توسعه دهندگان استفاده میشود. 

مثال نوشیدنی‌ها در قسمت چهارم میتوانست نام نوشیدنی و قیمت آن را نمایش دهد و همچنین میتوانستیم به لیست نوشیدنی‌ها، موردی را اضافه کنیم. اگر ورودی قیمت، اعتبارسنجی نشود، میتوان رشته‌ای را بجای عدد به عنوان قیمت به کامپوننت ارسال کرد. نحوه اعتبارسنجی قیمت نوشیدنی‌ها به صورت زیر است. 

const MenuItem = props => (
    <li className="list-group-item">
        <span className="badge">{props.price}</span>
        <p>{props.item}</p>
    </li>
)

MenuItem.propTypes = {
    price: React.PropTypes.number
};

شیء propTypes را به کامپوننت اضافه کرده‌ایم و در تنظیمات آن میتوانیم برای هر پارامتر ورودی یکی از  اعضای PropTypes از React را که مناسب حال پارامتر است، انتخاب کنیم. در مثال بالا مشخص کرده‌ایم که ورودی price باید عدد باشد و اگر مثلا رشته‌ای را بجای عدد ارسال کنیم، پیام خطای زیر را در Console خواهیم داشت. 

Warning: Failed prop type: Invalid prop `price` of type `string` supplied to `MenuItem`, expected `number`.
    in MenuItem (created by Menu)
    in Menu

یا میتوانستیم از React.PropTypes.number.isRequired استفاده کنیم تا درج مقداری برای این ورودی الزامی باشد. اگر اعتبارسنجی‌های React کافی نبودند میتوانیم اعتبارسنجی‌های سفارشی خودمان را ایجاد کنیم. در مثال زیر میخواهیم ورودی price بیشتر از 15000 نباشد.

MenuItem.propTypes = {
    price: (props, price)=>{
        if(props[price] > 15000){
            return new Error("Too expensive!");
        }
    }
};

let MenuItem = React.createClass({
    propTypes: {
        price: React.PropTypes.number
    }
});

class MenuItem extends React.Component{
    static propTypes = {
        price: React.PropTypes.number
    };
}

MenuItem.defaultProps = {
    price: 1000
};

let MenuItem = React.createClass({
    getDefaultProps() {
        return { price: 200 }
    },
    render() {
        return (
            <li className="list-group-item">
                <span className="badge">{this.props.price}</span>
                <p>{this.props.item}</p>
            </li>
        );
    }
});

for name in ["Vahid", "Hamid", "Saeid"]
  alert "Hi #{name}"

var i, len, name, ref;

ref = ["Vahid", "Hamid", "Saeid"];
for (i = 0, len = ref.length; i < len; i++) {
  name = ref[i];
  alert("Hi " + name);
}

for name, i in ["Vahid", "Hamid", "Saeid"]
  alert "#{i} - Hi #{name}"

alert name for name in ["Vahid", "Hamid", "Saeid"]

names = ["Vahid", "Hamid", "Saeid"]
alert name for name in names when name[0] is "V"

var i, len, name, names;

names = ["Vahid", "Hamid", "Saeid"];

for (i = 0, len = names.length; i < len; i++) {
  name = names[i];
  if (name[0] === "V") {
    alert(name);
  }
}

names = "Vahid": "Mohammad Taheri", "Ali": "Ahmadi"
alert("#{first} #{last}") for first, last of names

var first, last, names;

names = {
  "Vahid": "Mohammad Taheri",
  "Ali": "Ahmadi"
};

for (first in names) {
  last = names[first];
  alert(first + " " + last);
}

num = 6
minstrel = while num -= 1
  num + " Hi"

var minstrel, num;
num = 6;
minstrel = (function() {
  var _results;
  _results = [];
  while (num -= 1) {
    _results.push(num + " Hi");
  }
  return _results;
})();

range = [1..5]

var range;
range = [1, 2, 3, 4, 5];

firstTwo = ["one", "two", "three"][0..1]

var firstTwo;
firstTwo = ["one", "two", "three"].slice(0, 2);

numbers = [0..9]
numbers[3..5] = [-3, -4, -5]

my = "my string"[0..2]

words = ["Vahid", "Hamid", "Saeid", "Ali"]
alert "Stop" if "Hamid" in words

@name = "Vahid"

this.name = "Vahid";

User::first = -> @records[0]

User.prototype.first = function() {
  return this.records[0];
};

alert "OK" if name?

if (typeof name !== "undefined" && name !== null) {
  alert("OK");
}

name = myName ? "-"

var name;

name = typeof myName !== "undefined" && myName !== null ? myName : "-";

user.getAddress()?.getStreetName()

var ref;

if ((ref = user.getAddress()) != null) {
  ref.getStreetName();
}

user.getAddress().getStreetName?()

var base;

if (typeof (base = user.getAddress()).getStreetName === "function") {
  base.getStreetName();
}

export function showPrompt(message) {
  return prompt(message, "Type name");
}

export function showAlert(message) {
  return prompt(message, "Hello");
}

@page "/js-isolation"

@inject IJSRuntime jSRuntime

<button class="btn btn-primary" @onclick="Prompt">Prompt</button>
<button class="btn btn-primary" @onclick="ShowAlert">Alert</button>


@code
{
    private IJSObjectReference module;

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if(firstRender)
        {
            module = await jSRuntime.InvokeAsync<IJSObjectReference>("import", "./MyMdl.Js");
        }
    }

    private async Task Prompt()
    {
        var result = await module.InvokeAsync<string>("showPrompt", "What's your name?");
    }

    private async Task ShowAlert()
    {
        await module.InvokeVoidAsync("showAlert", "Hello!");
    }
}

namespace BlazorTreeView.ViewModels;

public class Comment
{
    public IList<Comment> Comments = new List<Comment>();
    public string? Text { set; get; }
}

using BlazorTreeView.ViewModels;

namespace BlazorTreeView.Pages;

public partial class TreeView
{
    private IReadOnlyDictionary<string, object> ChildrenHtmlAttributes { get; } =
        new Dictionary<string, object>(StringComparer.Ordinal)
        {
            { "style", "list-style: none;" },
        };

    private IList<Comment> Comments { get; } =
        new List<Comment>
        {
            new()
            {
                Text = "پاسخ یک",
            },
            new()
            {
                Text = "پاسخ دو",
                Comments =
                    new List<Comment>
                    {
                        new()
                        {
                            Text = "پاسخ اول به پاسخ دو",
                            Comments =
                                new List<Comment>
                                {
                                    new()
                                    {
                                        Text = "پاسخی به پاسخ اول پاسخ دو",
                                    },
                                },
                        },
                        new()
                        {
                            Text = "پاسخ دوم به پاسخ دو",
                        },
                    },
            },
            new()
            {
                Text = "پاسخ سوم",
            },
        };
}

/// <summary>
///   A custom DntTreeView
/// </summary>
public partial class DntTreeView<TRecord>
{

    /// <summary>
    ///     The treeview's self-referencing items
    /// </summary>
    [Parameter]
    public IEnumerable<TRecord>? Items { set; get; }

    /// <summary>
    ///     The treeview item's template
    /// </summary>
    [Parameter]
    public RenderFragment<TRecord>? ItemTemplate { set; get; }

    /// <summary>
    ///     The content displayed if the list is empty
    /// </summary>
    [Parameter]
    public RenderFragment? EmptyContentTemplate { set; get; }

public class Comment
{
    public IList<Comment> Comments = new List<Comment>();
    public string? Text { set; get; }
}

    /// <summary>
    ///     The property which returns the children items
    /// </summary>
    [Parameter]
    public Expression<Func<TRecord, IEnumerable<TRecord>>>? ChildrenSelector { set; get; }

        <DntTreeView
            TRecord="Comment"
            Items="Comments"
            ChildrenSelector="m => m.Comments"

public partial class DntTreeView<TRecord>
{
    private Expression? _lastCompiledExpression;
    internal Func<TRecord, IEnumerable<TRecord>>? CompiledChildrenSelector { private set; get; }

    // ...

    protected override void OnParametersSet()
    {
        if (_lastCompiledExpression != ChildrenSelector)
        {
            CompiledChildrenSelector = ChildrenSelector?.Compile();
            _lastCompiledExpression = ChildrenSelector;
        }
    }
}

@namespace BlazorTreeView.Pages.Components
@typeparam TRecord

@if (Items is null || !Items.Any())
{
    @EmptyContentTemplate
}
else
{
    <CascadingValue Value="this">
        <ul @attributes="AdditionalAttributes">
            @foreach (var item in Items)
            {
                <DntTreeViewChildrenItem TRecord="TRecord" ParentItem="item"/>
            }
        </ul>
    </CascadingValue>
}

@namespace BlazorTreeView.Pages.Components
@typeparam TRecord

<li @attributes="@SafeOwnerTreeView.ChildrenHtmlAttributes" @key="ParentItem?.GetHashCode()">
    @if (SafeOwnerTreeView.ItemTemplate is not null && ParentItem is not null)
    {
        @SafeOwnerTreeView.ItemTemplate(ParentItem)
    }
    @if (Children is not null)
    {
        <ul>
            @foreach (var item in Children)
            {
                <DntTreeViewChildrenItem TRecord="TRecord" ParentItem="item"/>
            }
        </ul>
    }
</li>

/// <summary>
///     A custom DntTreeView
/// </summary>
public partial class DntTreeViewChildrenItem<TRecord>
{
    /// <summary>
    ///     Defines the owner of this component.
    /// </summary>
    [CascadingParameter]
    public DntTreeView<TRecord>? OwnerTreeView { get; set; }

    private DntTreeView<TRecord> SafeOwnerTreeView =>
        OwnerTreeView ??
        throw new InvalidOperationException("`DntTreeViewChildrenItem` should be placed inside of a `DntTreeView`.");

    /// <summary>
    ///     Nested parent item to display
    /// </summary>
    [Parameter]
    public TRecord? ParentItem { set; get; }

    private IEnumerable<TRecord>? Children =>
        ParentItem is null || SafeOwnerTreeView.CompiledChildrenSelector is null
            ? null
            : SafeOwnerTreeView.CompiledChildrenSelector(ParentItem);
}

<div class="card" dir="rtl">
    <div class="card-header">
        DntTreeView
    </div>
    <div class="card-body">
        <DntTreeView
            TRecord="Comment"
            Items="Comments"
            ChildrenSelector="m => m.Comments"
            style="list-style: none;"
            ChildrenHtmlAttributes="ChildrenHtmlAttributes">
            <ItemTemplate Context="record">
                <div class="card mb-1">
                    <div class="card-body">
                        <span>@record.Text</span>
                    </div>
                </div>
            </ItemTemplate>
            <EmptyContentTemplate>
                <div class="alert alert-warning">
                    There is no item to display!
                </div>
            </EmptyContentTemplate>
        </DntTreeView>
    </div>
</div>