node chrome debugger

一、chrome://flags/#enable-devtools-experiments
open above link in Google Chrome

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choose Experiments
press 「shift」 sextic

Restart browser

二、

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$ npm run start

check terminal you'll see

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copy linkAddress and open in browser.
and open 「 localhost:7000 」

三、

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make breakPoint anywhere you want

refresh 『localhost:7000』

You got it!