With hot-reloading, when you change code, the logic is reloaded in place, without requiring a page load. As a developer, this means you don’t need to navigate back to the point in the page — with the appropriate state — where you were working every time you make a change. Instead, the logic just refreshes and you can keep on working.
Choosing Ember over React in 2016
Jesse Pollak

You could edit in Chrome…

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