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Console error log
an example of code that works in textastic 5.3.1, but gives an error in the console in the 6.3 version
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, minimal-ui">
</head>
<body>
<p>Click the button to open an output stream in a new window, add some text, then close the output stream.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
var w = window.open();
w.document.open();
w.document.write("<h1>Hello World!</h1>");
w.document.close();
}
</script>
</body>
</html>
Customer support service by UserEcho
That's probably related to the switch from the old UIWebView to the more performant WKWebView.
Textastic currently does not support multiple windows or tabs in the web preview, so creating a new window from JavaScript does not work properly at the moment, sorry.