vannhia osmundo valionie
Karren Bangura
If you are developing, then you need "Enable JavaScript source maps" and "Enable CSS source maps" checked to be able see your source code in Chrome Developer Tools. Unchecking those takes away your ability to debug your source code. It is like turning off the fire alarm instead of putting out the fire. You do not want to do that.
For me, the problem was caused not by the application in development itself, but by the Chrome extension React Developer Tool. I solved it partially by right-clicking the extension icon in the toolbar, clicking "Manage extension" and then enabling "Allow access to files URLs." But this measure fixed just some of the alerts.
Right: it has nothing to do with your code. I've found two valid solutions to this warning (not just disabling it). To better understand what a source map is, I suggest you check out this answer, where it explains how it's something that helps you debug:
The .map files are for JavaScript and CSS (and now TypeScript too) files that have been minified. They are called SourceMaps. When you minify a file, like the angular.js file, it takes thousands of lines of pretty code and turns it into only a few lines of ugly code. Hopefully, when you are shipping your code to production, you are using the minified code instead of the full, unminified version. When your app is in production, and has an error, the sourcemap will help take your ugly file, and will allow you to see the original version of the code. If you didn't have the sourcemap, then any error would seem cryptic at best.
First solution: apparently, Mr Heelis was the closest one: you should add the .map file and there are some tools that help you with this problem (Grunt, Gulp and Google closure for example, quoting the answer). Otherwise you can download the .map file from official sites like Bootstrap, jQuery, font-awesome, preload and so on... (maybe installing things like popper or swiper by the npm command in a random folder and copying just the .map file in your JavaScript/CSS destination folder)
Second solution (the one I used): add the source files using a CDN (content delivery network). (Here are all the advantages of using a CDN). Using content delivery network (CDN) you can simply add the CDN link, instead of the path to your folder. You can find CNDs on official websites (Bootstrap, jquery, popper, etc.) or you can easily search on some websites like Cloudflare, cdnjs, etc.
I appreciate this is part of your extensions, but I see this message in all sorts of places these days, and I hate it: how I fixed it (this fix seems to massively speed up the browser too) was by adding a dead file
Since Selenium IDE was already set to be able to read site data on all sites, I uninstalled it. (I read in another comment here that you might try enabling more permissions for an extension instead of removing it.) In my case, removing Selenium IDE (Chrome extension) got rid of the warnings.
I had the same problem. I tried to disable the extensions one by one to check it, and finally realized I had Adblock enabled, which was causing this issue. To remove that error I followed the step below,
This browser error means it has some compiled version of your JavaScript in a sourcemap intermediate file it or some 3rd party created that is now needed when debugging that same script in "devtools" in your web browser.
This can happen if your script fails (or in your case trying to get an image source hidden in the sourcemap code that created the script) but whose script error is tied to some JavaScript that got created from an original sourcemap file that now cannot be found to debug that same error. So it's an error about an error, a missing debugging file creating a new error. (crazy, huh?)
This error is likely coming from an extension in the web browser and is reporting it has generated a script error it has recorded in the console.log window of devtools (press F12 in the browser). The error is likely from the extension (not your code) saying it has some code that contains an address to a sourcemap file it cannot access, has a bad URI/URL address, is blocked, or that is missing.
A sourcemap, by the way, is a file that translates or transpiles code from one language to another language. Often this is a file that the browser uses to translate this source code into a child script like JavaScript/ECMAScript, or when it needs to do the opposite and recreate the source file from the child script. In most cases this file is not needed at all as a 3rd party software program has already compiled or transpiled the source code into the child script for the browser. For example, developers who like TypeScript use it to create JavaScript. This source code gets transpiled into JavaScript so the browser script engine can run it. The URI/URL to this sourcemap file is usually at the top of the javaScript or application compiled code file in a format like //#....
When this intermediary transpile file is missing or blocked for security reasons in a web browser, the application will usually not care unless it needs the source file for debugging the child script using this source file. In that case it will complain when it feels it needs this file and cannot find it, as it uses it to recreate the source file for the code running in the browser when debugging the script in order to allow a developer to debug the original source code. When it cannot find it, it means that any developer trying to debug it will not be able to do so, and is stuck with the compiled code only. So it is safe to turn off these errors in the various ways mentioned in this post. It should not affect your own scripts if it is connected to an extension. Even if it is related to your own scripts, it is still unlikely you need it unless you plan to run debugging from devtools.
TL;DR : Source maps aim to improve the web debugging experience. Although it is particularly useful when debugging JavaScript frameworks, if you want to disable it you can do it as follows.
However, as we are building more complex web applications nowadays,your development workflow may involve using various tools. These toolsrequire a build process to transpile your code into standard HTML,JavaScript, and CSS that browsers can understand. Additionally, tooptimize performance, it's common practice to compress (for example tominify and mangle JavaScript) and combine these files, reducing theirsize and making them more efficient for the web.
Source maps are files with names ending with .map (for example, >example.min.js.map and styles.css.map). They can be generated by most build >tools, for example, Vite, webpack, Rollup, Parcel, esbuild, and more.
Symptoms:
When racoon (the IKEv1 daemon) sees a tunnel config change, which occurs due to a config sync from the standby device, the change causes tmm and racoon to have conflicting views on the state of that tunnel.
If the IKEv1 tunnel is up at the time of the config change, tmm fails to restart the tunnel.
Symptoms:
If a virtual server is using a traffic-matching-criteria (TMC) with a destination-inline-port of zero ('any'), and this is later changed (either to a non-zero port value, or to a port-list with non-zero port values) the virtual server stops processing traffic.
If tmm is restarted (which causes an outage) the virtual server resumes accepting traffic using the new ports. In addition, changing the virtual server's port back to 'any' also causes traffic processing to resume.
Symptoms:
Subsessionlist entries are not cleaned up when subsessions are deleted. For long-lived main sessions, use cases such as API protection, the number of leaked subsessionlist entries increases over time, resulting in increasing memory consumption. If high availability (HA) is configured, the standby device can experience even more memory pressure when a very large number of subsessionlist entries are sent to it for mirroring.
Workaround:
You can work around this issue as follows.
- For the APM VPN case: define a listener (e.g. virtual server) over the tunnel to process the traffic (instead of relying on one of the default internal APM listeners). Note that the workaround may not work if the device is Active for multiple floating traffic-groups at the same time.
- For the device Active for multiple floating traffic-groups case: use MAC masquerading for all floating traffic-group, or set connection.syncookies.algorithm back to its default of hardware.
- For the traffic-group-local-only case: set connection.syncookies.algorithm back to its default of hardware, or disable AFM global syncookies by turning off the TCP Half-Open attack vector at the device level.
Symptoms:
If a UCS file from a BIG-IP system running a different software version that also has an ASM configuration is loaded onto a device that already has ASM provisioned, the load may hang indefinitely.
Impact:
-- UCS load might fail.
-- Config save and load operations fails while the UCS load hangs. The failure of those operations may not be obvious, leaving the BIG-IP saved configuration different from the running configuration.
Conditions:
-- Multicast traffic where identical fragments arrive on two different VLANs.
-- IP fragments for the same flow are received on different VLANs.
-- Alternatively, IP fragments for the same flow are received on different route domains.
Fix:
The tm.ipfragreassemblestrict db var is disabled by default. When enabled IPv6 or IPv4 fragments arriving on different interfaces are queued separately.
Note: In order to resolve this issue, a version with this fix is necessary and the tm.ipfragreassemblestrict must be set to enable.
Impact:
Memory_usage_stat and tmm/umem_usage_stat might reflect incorrect values under increased traffic load when the underlying double flow removal messages persist continuously on the blades.