window.open
Cannot Reliably Open Popups in a New Tab in All Browsers
Different browsers implement the behavior of window.open
in different ways, especially with regard to a user's browser preferences. You cannot expect the same behavior for window.open
to be true across all of Internet Explorer, Firefox, and Chrome, because of the different ways in which they handle a user's browser preferences.
For example, Internet Explorer (11) users can choose to open popups in a new window or a new tab, you cannot force Internet Explorer 11 users to open popups in a certain way through window.open
, as alluded to in Quentin's answer.
As for Firefox (29) users, using window.open(url, '_blank')
depends on their browser's tab preferences, though you can still force them to open popups in a new window by specifying a width and height (see "What About Chrome?" section below).
Demonstration
Go to your browser's settings and configure it to open popups in a new window.
Internet Explorer (11)
Test Page
After setting up Internet Explorer (11) to open popups in a new window as demonstrated above, use the following test page to test window.open
:
<!DOCTYPE html>
<html>
<head>
<title>Test</title>
</head>
<body>
<button onclick="window.open('https://stackoverflow.com/q/4907843/456814');">
<code>window.open(url)</code>
</button>
<button onclick="window.open('https://stackoverflow.com/q/4907843/456814', '_blank');">
<code>window.open(url, '_blank')</code>
</button>
</body>
</html>
Observe that the popups are opened in a new window, not a new tab.
You can also test those snippets above in Firefox (29) with its tab preference set to new windows, and see the same results.
What About Chrome? It Implements window.open
Differently from Internet Explorer (11) and Firefox (29).
I'm not 100% sure, but it looks like Chrome (version 34.0.1847.131 m
) does not appear to have any settings that the user can use to choose whether or not to open popups in a new window or a new tab (like Firefox and Internet Explorer have). I checked the Chrome documentation for managing pop-ups, but it didn't mention anything about that sort of thing.
Also, once again, different browsers seem to implement the behavior of window.open
differently. In Chrome and Firefox, specifying a width and height will force a popup, even when a user has set Firefox (29) to open new windows in a new tab (as mentioned in the answers to JavaScript open in a new window, not tab):
<!DOCTYPE html>
<html>
<head>
<title>Test</title>
</head>
<body>
<button onclick="window.open('https://stackoverflow.com/q/4907843/456814', 'test', 'width=400, height=400');">
<code>window.open(url)</code>
</button>
</body>
</html>
However, the same code snippet above will always open a new tab in Internet Explorer 11 if users set tabs as their browser preferences, not even specifying a width and height will force a new window popup for them.
So the behavior of window.open
in Chrome seems to be to open popups in a new tab when used in an onclick
event, to open them in new windows when used from the browser console (as noted by other people), and to open them in new windows when specified with a width and a height.
Summary
Different browsers implement the behavior of window.open
differently with regard to users' browser preferences. You cannot expect the same behavior for window.open
to be true across all of Internet Explorer, Firefox, and Chrome, because of the different ways in which they handle a user's browser preferences.