Click a form button to open a new tab in flask

Unfortunately online support for flask is somewhat limited. It is not treated as a mature web programming language. But I use it mainly for internal demo purpose, and it simplifies things tremendously. The trick is often that a technique is not specific to flask, but html in general.

It is relatively easy to redirect to a new tab with a hyperlink in html:

<a href=”” target=”_blank”> my awesome link </a>

will do that.

With forms, target is a top level attribute that controls rendering of the entire form

<form target=”_blank”> … <input type=”submit” value=”submit”> … </form>

To redirect to new tab for an individual button within the form, try

<form> … <input type=”submit” value=”submit” formtarget=”_blank” > … </form>

I also found that POST actions do not support Ctrl + Click, since the target url cannot infer the POST parameters directly.

Several useful links on flask:


About aquazorcarson

math PhD at Stanford, studying probability
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