It's a setting in chrome. You can't control how the browser interprets the target _blank.

Answer from Dennis Traub on Stack Overflow
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MDN Web Docs
developer.mozilla.org › en-US › docs › Web › API › Window › open
Window: open() method - Web APIs | MDN
The Window interface's open() method takes a URL as a parameter, and loads the resource it identifies into a new or existing tab or window. The target parameter determines which window or tab to load the resource into, and the windowFeatures parameter can be used to control to open a new popup ...
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W3Schools
w3schools.com › jsref › met_win_open.asp
Window open() Method
The open() method opens a new browser window, or a new tab, depending on your browser settings and the parameter values.
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Educative
educative.io › answers › what-is-the-windowopen-method-in-javascript
What is the window.open() method in JavaScript?
If you wish to send a user to another webpage in HTML, you need to add that page’s url to the html anchor tag <a> href attribute. You also need to add the target if you want that link to be opened in a new browser window.
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W3C
w3.org › WAI › WCAG21 › Techniques › html › H83
H83: Using the target attribute to open a new window on user request and indicating this in link text | WAI | W3C
Use of the target attribute provides an unambiguously machine-readable indication that a new window will open. User agents can inform the user, and can also be configured not to open the new window.
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Webmaster World
webmasterworld.com › html › 4683942.htm
Target=“ blank” vs window.open - HTML forum at WebmasterWorld - WebmasterWorld
HTML doesn't distinguish between "new window" and "new tab". It depends on how chummy your users are with their browser's prefs. ... Can someone add Target=“ _blank” to in-post links at WW Middle Click? (or SHIFT + Middle Click?) What's the shortcut on Mac? The · target attribute requires a transitional DOCTYPE in HTML 4, but OK in HTML 5. ... Ctrl+Click works for Chrome. But when the post goes like "look at the graph, during the months of...", one assumes that the link will open in a new tab to have it checked out while reading the post.
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SitePoint
sitepoint.com › get started
When to use target="_blank" or onClick="window.open()"? - Get Started - SitePoint Forums | Web Development & Design Community
April 26, 2010 - I have a couple questions regarding the topic in the title of this thread. Looking at a best practices standpoint, when is it alright or not alright to have a link open in a new window/tab? Looking at a usability stand…
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SitePoint
sitepoint.com › html & css
Target=“_blank” vs window.open - HTML & CSS - SitePoint Forums | Web Development & Design Community
June 30, 2014 - I’m working on an application ... use popup windows for such links. But does it have any advantage over a simple target=“_blank” attribute?...
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GitHub
gist.github.com › sttk › 22e74eaadde493265f38c539f3cafb37
Window open · GitHub
Initially, an opened window has "about:blank", and then sets a specified URL when the window start to loaded the URL. If this URL is an empty string, null or undefined, and target is not empty and not 'about:blank', gets and focus a window named to target.
Find elsewhere
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Slickmedia
slickmedia.io › blog › open-links-in-specific-target-window-javascript-data-attributes
Open Links in Specific Target Window using JavaScript and Data Attributes
August 14, 2024 - A custom JavaScript that dynamically opens single or multiple links in a new window _blank or a window target format of your choosing, such as _self or _parent using Data Attributes.
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TutorialsPoint
tutorialspoint.com › target-a-window-using-javascript-or-html
Target a Window Using JavaScript or HTML
In this article we will learn how to use the TARGET attribute to open a website in a new window using HTML and JavaScript TARGET attribute of HTML A link's opening named frame or window is specified using the Target attribute of the anchor tag. T
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Reddit
reddit.com › r/javascript › window.open is opening currenturl + target concatenated?
r/javascript on Reddit: window.open is opening currentUrl + target concatenated?
May 3, 2017 -

Hey, I'm using an HTML field, and then passing an HTML element into it using jQuery's '.html()' method. The button loads fine into the page, and it launches a new window when clicked, but the target ends up being a concatentation of the URL for the current page, plus the URL we're passing into it.

HTML

<div>
    <h4 id="link"></h4>
</div>

JavaScript (note, the URL is being pulled from an input text field, and is populated via database lookup)

$(document).ready(function() {
   var linkFill = function() {
    var url = encodeURIcomponent($('#q54 input').val());
    $('#link').html('<input type="button" value="Go To Incident Folder" onclick="window.open('+ "'" + url + "'" + ')" target="_blank">');
     console.log('url='+url);
  }
  
  $('#q49 input').blur(function() {
    setTimeout(linkFill, 2000);
  });

});

Thoughts?

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Alexking
alexking.org › blog › 2005 › 12 › 30 › new-windows
window.open(this.href) vs target=”_blank”
Like most people who have migrated to XHTML for web development, I stopped using target="_blank" for opening links in new windows in favor of onclick="window.open(this.href); return false". They accomplish the same thing (opening the link in a new window) and the second one validates.
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MDN Web Docs
developer.mozilla.org › en-US › docs › Web › API › Window › opener
Window: opener property - Web APIs | MDN
The Window interface's opener property returns a reference to the window that opened the window, either with open(), or by navigating a link with a target attribute.
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Reality Ripple
udn.realityripple.com › docs › Web › API › Window › open
Window.open() - Web APIs
This is useful for preventing untrusted sites opened via window.open() from tampering with the originating window, and vice versa. Note that when noopener is used, nonempty target names other than _top, _self, and _parent are all treated like _blank in terms of deciding whether to open a new ...
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GitHub
github.com › whatwg › html › issues › 2636
Sort out window.opener behavior when a window.open with target targets an existing window · Issue #2636 · whatwg/html
Click the "do open" link, then follow the steps from the first testcase in the resulting window. Per spec, second alert should be "[object Window] false" but it's "[object Window] true" in Firefox, Chrome, and Safari. Live testcase at http://web.mit.edu/bzbarsky/www/testcases/window-opener/open-targeting-new.html
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Royal Apps
support.royalapps.com › support › discussions › topics › 17000016447
Difference between target=_blank and window.open : Royal Apps
In Web Page plugin, when TSX is full screen, when a popup window opened because of a target=_blank attribute (or right click / Open in New Window), it is opened in full screen. However, a call to window.open opens a popup window in the same ...
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GeeksforGeeks
geeksforgeeks.org › javascript › javascript-window-open-method
JavaScript window.open() Method - GeeksforGeeks
August 5, 2025 - The Javascript window.open() method is used to open a new tab or window with the specified URL and name.