tauri-workspace/core/tauri/scripts/isolation.js

// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT

window.addEventListener('DOMContentLoaded', () => {
  if (window.location.origin.startsWith(__TEMPLATE_origin__)) {
    let style = document.createElement('style')
    style.textContent = __TEMPLATE_style__
    document.head.append(style)

    let iframe = document.createElement('iframe')
    iframe.id = '__tauri_isolation__'
    iframe.sandbox.add('allow-scripts')
    iframe.src = __TEMPLATE_isolation_src__
    document.body.append(iframe)
  }
})