JavaScript Polyfill is code that implements the functionality not supported by certain browsers in a non-native way.
Some Hands-On with the HTML Dialog Element
jQuery Modal Dialogs for Sitecore 6.5-7.0 to fix Chrome 37+
asp.net window.showModalDialog模态窗口无法下载文档问题_asp.net
Implementing modal popup with native html
undefined and null in JavaScript
How to use polyfill in JavaScript ? - GeeksforGeeks
globalThis and Polyfill in Javascript, by Susanne Lundkvist
javascript - Polyfill window.showModalDialog in webview - Stack
JavaScript function works only in Internet Explorer (in ASP.NET
Exception in BrowserPlatformLocation on IE in mobile window