In the Settings/Preferences dialog (Ctrl+Alt+S), go to .
On the Live Edit page that opens, select the Update application in Chrome on changes in checkbox.
By default, IntelliJ IDEA shows on-the-fly preview only for HTML and CSS code. To enable Live Edit in JavaScript, select the JavaScript, HTML and CSS option.
Specify the time-delay between changing the code in the editor and showing this change in the browser: accept the default value 300 ms
or specify a custom value using the spin box next to the corresponding field.
To enable reloading of JavaScript files that are executed by Node.js, select the Update Node.js application on change checkbox. Use the spin box to specify the elapsed time for upload, the default value is 300.
To enable Live Edit in code that can be compiled into JavaScript, HTML, or CSS, for example, in TypeScript, Pug, or SCSS, select the Track changes in files compiled to JavaScript, HTML or CSS checkbox.
All the changes made in such files are automatically saved to trigger compilation and then appear in the browser.
Note that a changed file is saved shortly after the update, contrary to regular autosave triggered by closing a file, a project, or IntelliJ IDEA, or by other events.
To configure highlighting, select the Highlight current element in browser on caret change checkbox. Otherwise, during a debugging session, you will have to hold Shift and hover over the element in the editor to highlight it in the browser.
Select the Restart if hotswap fails checkbox to allow IntelliJ IDEA to reload the page automatically if the changes couldn't be applied without that.