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3 changes: 2 additions & 1 deletion packages/react-dev-utils/webpackHotDevClient.js
Original file line number Diff line number Diff line change
Expand Up @@ -243,7 +243,8 @@ function tryApplyUpdates(onHotUpdateSuccess) {
}

function handleApplyUpdates(err, updatedModules) {
const hasReactRefresh = process.env.FAST_REFRESH !== 'false';
// NOTE: This var is injected by Webpack's DefinePlugin, and is a boolean instead of string.
const hasReactRefresh = process.env.FAST_REFRESH;
const wantsForcedReload = err || !updatedModules || hadRuntimeError;
// React refresh can handle hot-reloading over errors.
if (!hasReactRefresh && wantsForcedReload) {
Expand Down