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[Problem/Bug]: In WebView2CompositionControl, the HTML/JS drag/drop not work #5237

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orrindeng opened this issue May 12, 2025 · 0 comments
Open

[Problem/Bug]: In WebView2CompositionControl, the HTML/JS drag/drop not work #5237

orrindeng opened this issue May 12, 2025 · 0 comments
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@Badhri
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@orrindeng
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orrindeng commented May 12, 2025 •
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What happened?

The HTML/JS drag/drop can't work well in WebView2CompositionControl.

If you drag in WebView2, it will be like this.
Image

If you drag in WebView2CompositionControl, it will be like this.
Image

Importance

Blocking. My app's basic functions are not working due to this issue.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

No response

SDK Version

No response

Framework

WPF

Operating System

Windows 11

OS Version

No response

Repro steps

I'm trying to use WebView2CompositionControl to replace the WebView2 and we want to avoid the Airspace issue.
But the drag drop can't work well compared to WebView2.

<Window x:Class="WpfApp8.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp8" xmlns:wpf="clr-namespace:Microsoft.Web.WebView2.Wpf;assembly=Microsoft.Web.WebView2.Wpf"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <wpf:WebView2CompositionControl Source="file:///D:/TestDrag.html"></wpf:WebView2CompositionControl>
        <!--<wpf:WebView2 Source="file:///D:/TestDrag.html"></wpf:WebView2>-->
    </Grid>
</Window>

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>net8.0-windows10.0.17763</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
    <UseWPF>true</UseWPF>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Web.WebView2" Version="1.0.3240.44" />
  </ItemGroup>

</Project>

Please create a HTML file. Put it to D:\ or replace the Source URL in the XAML.

<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>Drag Test</title>
    <style>
        #draggable {
            width: 100px;
            height: 100px;
            background-color: lightblue;
            text-align: center;
            line-height: 100px;
            cursor: grab;
            margin: 20px;
            border: 1px solid #333;
            user-select: none;
        }

        #droptarget {
            width: 200px;
            height: 200px;
            background-color: lightgray;
            border: 2px dashed #666;
            margin: 20px;
            text-align: center;
            line-height: 200px;
            font-family: sans-serif;
            color: #444;
        }
    </style>
</head>
<body>

    <h3 style="text-align:center;">Drag Test</h3>

    <div id="draggable" draggable="true">
        Drag Me
    </div>

    <div id="droptarget">
        Target Area
    </div>

    <script>
  const draggable = document.getElementById('draggable');
  const droptarget = document.getElementById('droptarget');

  draggable.addEventListener('dragstart', function (event) {
    event.dataTransfer.setData("text/plain", event.target.id);
  });

  droptarget.addEventListener('dragover', function (event) {
    event.preventDefault(); 
  });

  droptarget.addEventListener('drop', function (event) {
    event.preventDefault();
    const data = event.dataTransfer.getData("text/plain");
    const draggedElement = document.getElementById(data);
    droptarget.innerHTML = "";
    droptarget.appendChild(draggedElement);
    draggedElement.style.display = "block";
  });
    </script>

</body>
</html>

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

No, this never worked

Last working version (if regression)

No response
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@Badhri Badhri

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@Badhri @orrindeng