You can disable window resizing by setting the resizable feature to no .

: If your application links out to third-party domains using window.open() , append noopener within your features string to eliminate security risks and process-blocking performance penalties.

const newWindow = window.open('https://example.com', 'myWindow', 'width=400,height=300'); newWindow.postMessage('Hello from parent window!', '*');

: Features must be separated by commas without spaces ( "width=500,height=500" ). Spaces can cause browsers to misparse the entire string.

const features = `width=$w,height=$h,top=$top,left=$left`;

: Toggles the visibility of the browser menu bar ( yes / no or 1 / 0 ).

function openOAuthPopup(url) const width = 500; const height = 600;

: A comma-separated string of key-value pairs (e.g., "width=800,height=600" ). This string defines the configuration of the new window. Detailed Breakdown of Window Feature Options

window.open('https://example.com', 'My Custom Title', 'width=400,height=300');