`srcDoc ` not work in iOS webview

[kinka]

see the storybook

It will show the content "Hello World" in safari, but nothing if the url loaded in an app's webview context. srcDoc just doesn't work.

environment: iOS 10.3.3

suggestion: use data URI instead, src="data:text/html, <p>html here</p>"

same issue: ios-iframe-bug