window.print() opens the print dialog for the current document (MDN). No parameters. Returns undefined.
Pass the required arguments shown below. Check return values and browser support before you rely on the result.
Call window.print. Start with this line.
print() / window.print()| Call | What it does |
|---|---|
print() / window.print() | Primary signature. |
window.print(...) | Call with the arguments your case needs. |
Built into the browser. Call window.print(...) (or the global print(...)) — no import required.
print() / window.print()This member has no parameters beyond those shown in the signature.
| Return Value | Description |
|---|---|
| * | Always undefined |
Open the print dialog from a button.
// inside a click handler
window.print();
// same as: print();undefined.Ask before opening the dialog — good UX for accidental clicks.
if (confirm("Print this page?")) {
window.print();
} else {
console.log("cancelled");
}confirm() returns true / false.print() on OK.Open a small window with only the content you want, then print it.
const popup = window.open("", "PrintWin", "width=480,height=360");
if (!popup) {
console.log("blocked");
} else {
popup.document.write("Invoice
Total: $42
");
popup.document.close();
popup.focus();
popup.print();
}popup.print() prints that document.@media print on the main page instead.beforeprint / afterprintRun code when the dialog opens and when it closes.
window.addEventListener("beforeprint", function () {
console.log("before");
});
window.addEventListener("afterprint", function () {
console.log("after");
});
window.print();@media print for most hide/show needs.Confirm that print() always returns undefined.
const result = window.print();
console.log(result); // undefinedundefined — no success/fail flag.Window.print() is marked Baseline Widely available on MDN (since June 2023). Browser Window API.
Open the print dialog across modern browsers.
Bottom line: Safe to use for Print buttons. Pair with @media print for clean output.
Ask the user for a line of text with a modal dialog.
9 people found this page helpful