blukis edited a comment on issue #827:
URL: https://github.com/apache/cordova-ios/issues/827#issuecomment-738191106
I ran into a similar issue with migration to WkWebView. (Additionally, I
needed iframes to run as same origin, despite WkWebView treating anything
loaded via `src="file://..."` as unique-origin.) This is my workaround. It
inserts html content directly into the iframe rather than using `src="..."`
attribute, so no references to external files.
```
function frameEl_injectHtml(frameEl, injectHtml) {
// frameEl must exist in DOM before its contentWindow is accessible.
if (!frameEl.contentWindow) { alert("frameInjectHtml() but frameEl not
(yet or anymore) in DOM."); return; }
frameEl.contentWindow.document.open('text/htmlreplace');
frameEl.contentWindow.document.write(injectHtml);
frameEl.contentWindow.document.close();
}
// Create <frame>, insert into DOM, and inject content.
var frameHtml = "<html><head></head>" +
"<body style='background-color:#eee; color:#000;'>" +
"iframe body" +
"<script>window.parent.alert('iframe even same-origin as
parent.');</script>" +
"</body></html>";
var frameEl = document.createElement('iframe');
frameEl.src = "about:blank";
document.body.appendChild(frameEl);
frameEl_injectHtml(frameEl, frameHtml);
```
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