window.print is not a function()

Hello everyone ,
I have a html (bootsrap ) page .I want to print current page .I created a file css where i defined all css when medai print.
The only problem is that when i tried to window.print() when clicking on a button , it gives me a error  window.print is not a function ?

Can anyone Help me, please?

PaolaSoftware DeveloperAsked:
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mohan singhWeb developerCommented:
Dear Paola

it is simple do like this

<!DOCTYPE html>

<p>Click the button to print the current page.</p>

<button onclick="myFunction()">Print this page</button>

function myFunction() {


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PaolaSoftware DeveloperAuthor Commented:
I did it , the problem was that the page was not loaded completely.
Thanks for your attention .
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