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- Add overflow: hidden and position: relative to #terminal container so the container constrains the canvas size rather than expanding to fit it - Call fitAddon.observeResize() for automatic resize on container changes - Use term.onResize event to notify PTY of dimension changes (works with both observeResize and manual fit calls) - Keep window resize handler for browsers that don't trigger ResizeObserver on window resize This ensures the terminal properly sizes itself to fill the container on initial load and responds to container/window size changes. fix: expose renderer publicly for FitAddon to access FitAddon.proposeDimensions() was returning undefined because it couldn't access the terminal's renderer to get font metrics. The renderer was private, so FitAddon couldn't calculate the correct terminal dimensions. Changes: - Make Terminal.renderer public so FitAddon can access getMetrics() - Add observeResize() call to demo/index.html - Make initTerminal async and await term.open() in demo/index.html - Update demo/bin/demo.js CSS to use absolute positioning for #terminal The root cause was that FitAddon needs renderer.getMetrics() to calculate how many cols/rows fit in the container, but the renderer field was private.
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