Polypane includes both live and autoreloading functionality. You can find this by right clicking the reload icon and selecting either "Live reload" or "Auto reload", or in the View menu.
Live reloading will update your page whenever Polypane detects a change on your filesystem. In the configuration panel, select a directory and check the events you want to respond to. When editing, often just "Change file" is enough. Adding more will take more resources, but will also pick up new or removed files. When live reloading is active, you'll see a lightning bolt next to the reload icon.
No page refresh for CSS and images
Live reloading will automatically try to replace the CSS, images and background images in your site without a page refresh. If it can't find a match, or if you're updating another type of file, the page is reloaded.
Auto reloading is there for when you're working on a website that's not on your local machine (like a staging environment) that you still want to reload on changes. You can select the interval in seconds for when a page should reload. Polypane will wait for a page to load fully before starting the countdown.
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