Webview is not download automatically. Both ios and android

[atjab]

The webview not download file automatically to device. In html, I use a link tag and set attribute as download. In webview ios, just open and preview that file but not download automatically. At the same time, android nothing happened and reload page. I should fix in web script for download or it possible to setting or something in native app via webview ?

"react-native": "0.70.6",
"react-native-webview": "^11.26.0",

<Webview
    javaScriptEnabled={true}
    domStorageEnabled={true}
    allowFileAccessFromFileURLs={true}
    allowUniversalAccessFromFileURLs={true}
    allowFileAccess={true}
    originWhitelist={['*']}
    mixedContentMode={'always'} 
/>

In my web script

const downloadFileFromObjectUrl = (source, filename) => {
    const downloadUrl = window.URL.createObjectURL(source)
    const link = document.createElement('a')
    link.href = downloadUrl
    link.setAttribute('download', filename)
    document.body.appendChild(link)
    link.click()
    link.remove()
}

Thank everyone for suggestion.

[TheAlmightyBob]

For iOS, that is the expected behavior. You'd need to implement onFileDownload

For Android, that's not necessarily expected, but we'd need a sample project or Expo Snack that repros the issue. (or you could debug the Android code yourself, if you search for "download" it shouldn't be hard to find places to put a breakpoint)

[BraveEvidence]

This will help https://www.youtube.com/watch?v=Rq-mAjkG2ME&list=PLQhQEGkwKZUrempLnmxjt7ZCZJu1W3p2i&index=14

[github-actions]

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[linonetwo]

I can confirm Android is not downloading when click a link like

var link = document.createElement("a");
var blob = new Blob(["sdfa"], {type: "text/html"});
link.setAttribute("href", URL.createObjectURL(blob));
link.setAttribute("download","filename");
document.body.appendChild(link);
// <a href=​"blob:​http:​/​/​localhost/​cf8ae139-a28c-43ec-9943-86ff2e0d10d0" download=​"filename">​</a>​

link.click();