PhpStorm adding script to my GET responses

Question

I'm responding to a GET request with JSON data (Content-Type application/json; charset=utf-8), but it keeps tacking on this random script to every response and I cannot get rid of it no matter what I do:

37 requests
720.83 kB / 707.49 kB transferred
Finish: 602 ms
DOMContentLoaded: 214 ms
load: 476 ms
SyntaxError: JSON.parse: unexpected non-whitespace character after JSON data at line 1 column 503 of the JSON data
{"expected_data":"values"}<script>
(function() {
 var ws = new WebSocket('ws://' + window.location.host + 
 '/jb-server-page?reloadMode=RELOAD_ON_SAVE&'+
 'referrer=' + encodeURIComponent(window.location.pathname));
 ws.onmessage = function (msg) {
 if (msg.data === 'reload') {
 window.location.reload();
 }
 if (msg.data.startsWith('update-css ')) {
 var messageId = msg.data.substring(11);
 var links = document.getElementsByTagName('link');
 for (var i = 0; i < links.length; i++) {
 var link = links[i];
 if (link.rel !== 'stylesheet') continue;
 var clonedLink = link.cloneNode(true);
 var newHref = link.href.replace(/(&|\?)jbUpdateLinksId=\d+/, "1ドルjbUpdateLinksId=" + messageId);
 if (newHref !== link.href) {
 clonedLink.href = newHref;
 }
 else {
 var indexOfQuest = newHref.indexOf('?');
 if (indexOfQuest >= 0) {
 // to support ?foo#hash 
 clonedLink.href = newHref.substring(0, indexOfQuest + 1) + 'jbUpdateLinksId=' + messageId + '&' + 
 newHref.substring(indexOfQuest + 1);
 }
 else {
 clonedLink.href += '?' + 'jbUpdateLinksId=' + messageId;
 }
 }
 link.replaceWith(clonedLink);
 }
 }
 };
})();
</script>

Does anyone know where this script is coming from and how I can disable it? I've also tried disabling the debugger in both my browser and in PhpStorm.

I've searched high and low and I know it has something to do with "live edit", but I cannot find any options to enable/disable it no matter where I look.

• Doc Bok: Not sure why this is closed. It fits the parameters: 3. software tools commonly used by programmers; and is a practical, answerable problem that is unique to software development.
• hakre: Found another answer that may be more straight forward / useful to know about when setting up the project in the IDE "more completely": stackoverflow.com/a/79752335/367456

Answer 1

Does anyone know where this script is coming from and how I can disable it? I've also tried disabling the debugger in both my browser and in PhpStorm.

To prevent the <script> tag related to the RELOAD_ON_SAVE feature by IntelliJ (also for PhpStorm), open the Settings (Menu: File > Settings... – Keyboard: Ctrl+Alt+S) and disable the Reload behavior section's Reload page in browser by setting the drop-down to "Disabled" under Tools > Web Browsers and Preview.

the Reload behavior setting Reload page in browser by setting the drop-down to "Disabled"

Restart PhpStorm for that setting to take effect, e.g. Menu: File > Invalidate Caches ...; Then click the Just restart link.

the Just restart link

It will get rid off the reload script that injects the web socket connection, however some query parameters will retain:

before: http://localhost:63342/project/index.html?_ijt=prpu...fj1m&_ij_reload=RELOAD_ON_SAVE
after: http://localhost:63342/project/index.html?_ijt=2gef...nbc5

Checked against PhpStorm 2025年2月1日 RC Build #PS-252.25557.79, built on August 21, 2025.

Answer 2

I've found the cause. PHPStorm adds these parameters when you open the index page via ALT+F2:

?_ijt=pdprfcc6u90jpqpfgc0hfk2mk3&_ij_reload=RELOAD_ON_SAVE

My code automatically preserves URL parameters, so this was causing the devenv to return the extra payload.

• Don't Panic: No idea why someone would downvote this, it seems like useful info, +1 to counter the downvote. You could expand your answer a bit to describe why you might use ALT+F2, which might make it easier to find for future visitors.
• hakre: @Don'tPanic: Also no clue, however there is a setting to deactivate this specific behaviour in the IDE - I've left an answer that should add more keywords for future searches: stackoverflow.com/a/79746445/367456

Answer 3

Does anyone know where this script is coming from and how I can disable it? I've also tried disabling the debugger in both my browser and in PhpStorm.

The overall behaviour can be completely 1 prevented by adding a webserver to your project configuration (Menu: Tools -> Deployment -> Confguration...).

Once set up, e.g. type Local or mounted folder, PhpStorm opens according to your projects path <-> browser mappings.

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1 an alternative variant to the existing answer that is about controlling/setting the RELOAD_ON_SAVE behaviour.