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December 3, 2019 12:39
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Pages will not be loaded in child windows in Firefox Preview build #13031728 and #13371033
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| <!doctype html> | |
| <html lang="en"> | |
| <meta charset="UTF-8"> | |
| <title>Manipulating child window</title> | |
| <a href="https://example.com/" target="tc-20191203-2-child">Click this hyperlink to open <code>example.com</code> in a new window</a> | |
| <script> | |
| { | |
| let flipFlop = false; | |
| document.querySelector('a').addEventListener('click', (evt) => { | |
| window.open('', 'tc-20191203-2-child', 'width=600,height=400'); | |
| if (!flipFlop) { | |
| evt.preventDefault(); | |
| window.setTimeout(() => { | |
| evt.target.click(); | |
| }); | |
| } | |
| flipFlop = !flipFlop; | |
| }); | |
| } | |
| </script> |
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| <!doctype html> | |
| <html lang="en"> | |
| <meta charset="UTF-8"> | |
| <title>Manipulating child window</title> | |
| <a href="https://example.com/" target="tc-20191203-child">Click this hyperlink to open <code>example.com</code> in a new window</a> | |
| <script> | |
| document.querySelector('a').addEventListener('click', () => { | |
| window.open('', 'tc-20191203-child', 'width=600,height=400'); | |
| }); | |
| </script> |
I confirmed the same phenomena with Nightly 191203 10:27 (Build #13371033)
I also want to note that, due to this behaviour (which is neither confirmed with old Firefox Mobile nor Chrome), some buttons (e.g. a button to open a debit card statement) in the online banking website of MUFG Bank will not work in build #13031728.
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These test cases are inteded to demonstrate that, in Firefox Preview build #13031728, the specified page in a hyperlink won't be loaded in its target window if the target window is artificially opened along with the navigation event.
For instance, try the following steps with
tc-20191203.html(or with https://makotom.net/tc-20191203.html instead):Expected result is:
https://example.com/ is shown in a new window (tab).
Actual result with the current Firefox Preview is:
A blank page is shown.
I also found out that, if there are another "ticks" between
window.openand actual navigation, this issue will not appear.See
tc-20191203-2.htmland see what are different from the main test casetc-20191203.htmlby comparing codes and their behaviour with the repro steps described above.