Parsing errors in Chrome - javascript

<script type="module" id="user-code">
try {
someUnknownReference;
} catch (error) {
console.log(error) // correct
console.log(error.toString()); // incorrect
console.log(error.stack.toString().split('\n')); // incorrect - line number and filename is wrong
}
//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbImluZGV4LmpzIl0sIm5hbWVzIjpbImxrc2xrcyJdLCJtYXBwaW5ncyI6IkFBQUFBLE1BQU0iLCJmaWxlIjoiYnVuZGxlLmpzIiwic291cmNlc0NvbnRlbnQiOlsibGtzbGtzIl19
</script>
I'm building a browser based code editor using Babel. All is working well, however I can't for the life of me extract the line number and file name out of the errors that happen during run time.
The example above is a simplified version of what I'm doing. I'm injecting a string into a script tag e.g scriptTag.innerHTML = bundledCode;
The first console.log prints exactly what I want to parse e.g it has the file name and correct line number which it gets from the sourcemap
ReferenceError: someUnknownReference is not defined
at index.js:1
However, as soon as I try to do anything with the error e.g the second console.log, I lose the line number and file name.
ReferenceError: someUnknownReference is not defined
My guess is maybe it's losing the reference to the sourcemap when we try to parse the object?
Thanks in advance for any help!

I think Chrome console is automatically consuming source maps to provide the correct error msg if you're console logging the error. Not if you're grabbing the actual string. Do you need something like this: https://www.npmjs.com/package/sourcemapped-stacktrace?

Related

Error Updating a Chromebook's Organizational Unit with Google Script

I have been experiencing an issue recently with a Google Script code I wrote to update a few Chromebooks' organization units.
Here is a portion of the code that I am running:
let admin = AdminDirectory.Chromeosdevices.get("my_customer", active_deviceid[serial_index])
admin.annotatedAssetId = device_ID.toString()
admin.annotatedLocation = name
admin.orgUnitPath = _location_(device_ID).toString().toUpperCase()
AdminDirectory.Chromeosdevices.update(admin, 'my_customer', active_deviceid[serial_index])
Once the script executes I get the following error:
GoogleJsonResponseException: API call to directory.chromeosdevices.update failed with error: Invalid Input: Inconsistent Orgunit id and path in request - 11006550017573025, /1 SCHOOLS/COVID LOANERS
What is strange is that if I comment or remove "admin.orgUnitPath = location(device_ID).toString().toUpperCase()" the script will run fine. It seems the orgUnitPath is causing this error.
I tried the following:
Removing the first slash "/"
Do only 1 Chromebook
Remove and reapply the AdminDirectory
Run previous scripts that were used to change the OrgUnitPath
Added quotes on the beginning and end of the OrgUnitPath
Converted the path to String with toString()
used Stript() function to eliminate any empty spaces
All the above attempts failed to fix this issue. I will also include an image of an error I am getting from a previous script I made that used to work about a year ago that also changes the OrgUnitPath.
Does anyone know how to fix this issue?
Thanks in advance.
For some reason there has been a change that now requires the orgUnitId in addition to the orgUnitPath.
So before you run AdminDirectory.Chromeosdevices.update you need to obtain the orgUnitId and update that property
var orgUnitPathStr = "/Tech Dept/Storage"
admin.orgUnitId = AdminDirectory.Orgunits.get("my_customer",orgUnitPathStr.substring(1)).orgUnitId;
//substring(1) above removes the first slash in the orgUnitPath, which is required for this method
Credit for hints:
https://github.com/taers232c/GAMADV-XTD3/issues/225

Ajax Error : Uncaught SyntaxError: Unexpected token '<' [duplicate]

I am running an AJAX call in my MooTools script, this works fine in Firefox but in Chrome I am getting a Uncaught SyntaxError: Unexpected token : error, I cannot determine why. Commenting out code to determine where the bad code is yields nothing, I am thinking it may be a problem with the JSON being returned. Checking in the console I see the JSON returned is this:
{"votes":47,"totalvotes":90}
I don't see any problems with it, why would this error occur?
vote.each(function(e){
e.set('send', {
onRequest : function(){
spinner.show();
},
onComplete : function(){
spinner.hide();
},
onSuccess : function(resp){
var j = JSON.decode(resp);
if (!j) return false;
var restaurant = e.getParent('.restaurant');
restaurant.getElements('.votes')[0].set('html', j.votes + " vote(s)");
$$('#restaurants .restaurant').pop().set('html', "Total Votes: " + j.totalvotes);
buildRestaurantGraphs();
}
});
e.addEvent('submit', function(e){
e.stop();
this.send();
});
});
Seeing red errors
Uncaught SyntaxError: Unexpected token <
in your Chrome developer's console tab is an indication of HTML in the response body.
What you're actually seeing is your browser's reaction to the unexpected top line <!DOCTYPE html> from the server.
Just an FYI for people who might have the same problem -- I just had to make my server send back the JSON as application/json and the default jQuery handler worked fine.
This has just happened to me, and the reason was none of the reasons above. I was using the jQuery command getJSON and adding callback=? to use JSONP (as I needed to go cross-domain), and returning the JSON code {"foo":"bar"} and getting the error.
This is because I should have included the callback data, something like jQuery17209314005577471107_1335958194322({"foo":"bar"})
Here is the PHP code I used to achieve this, which degrades if JSON (without a callback) is used:
$ret['foo'] = "bar";
finish();
function finish() {
header("content-type:application/json");
if ($_GET['callback']) {
print $_GET['callback']."(";
}
print json_encode($GLOBALS['ret']);
if ($_GET['callback']) {
print ")";
}
exit;
}
Hopefully that will help someone in the future.
I have just solved the problem. There was something causing problems with a standard Request call, so this is the code I used instead:
vote.each(function(element){
element.addEvent('submit', function(e){
e.stop();
new Request.JSON({
url : e.target.action,
onRequest : function(){
spinner.show();
},
onComplete : function(){
spinner.hide();
},
onSuccess : function(resp){
var j = resp;
if (!j) return false;
var restaurant = element.getParent('.restaurant');
restaurant.getElements('.votes')[0].set('html', j.votes + " vote(s)");
$$('#restaurants .restaurant').pop().set('html', "Total Votes: " + j.totalvotes);
buildRestaurantGraphs();
}
}).send(this);
});
});
If anyone knows why the standard Request object was giving me problems I would love to know.
I thought I'd add my issue and resolution to the list.
I was getting: Uncaught SyntaxError: Unexpected token < and the error was pointing to this line in my ajax success statement:
var total = $.parseJSON(response);
I later found that in addition to the json results, there was HTML being sent with the response because I had an error in my PHP. When you get an error in PHP you can set it to warn you with huge orange tables and those tables were what was throwing off the JSON.
I found that out by just doing a console.log(response) in order to see what was actually being sent. If it's an issue with the JSON data, just try to see if you can do a console.log or some other statement that will allow you to see what is sent and what is received.
When you request your JSON file, server returns JavaScript Content-Type header (text/javascript) instead of JSON (application/json).
According to MooTools docs:
Responses with javascript content-type will be evaluated automatically.
In result MooTools tries to evaluate your JSON as JavaScript, and when you try to evaluate such JSON:
{"votes":47,"totalvotes":90}
as JavaScript, parser treats { and } as a block scope instead of object notation. It is the same as evaluating following "code":
"votes":47,"totalvotes":90
As you can see, : is totally unexpected there.
The solution is to set correct Content-Type header for the JSON file. If you save it with .json extension, your server should do it by itself.
It sounds like your response is being evaluated somehow. This gives the same error in Chrome:
var resp = '{"votes":47,"totalvotes":90}';
eval(resp);
This is due to the braces '{...}' being interpreted by javascript as a code block and not an object literal as one might expect.
I would look at the JSON.decode() function and see if there is an eval in there.
Similar issue here:
Eval() = Unexpected token : error
This happened to me today as well. I was using EF and returning an Entity in response to an AJAX call. The virtual properties on my entity was causing a cyclical dependency error that was not being detected on the server. By adding the [ScriptIgnore] attribute on the virtual properties, the problem was fixed.
Instead of using the ScriptIgnore attribute, it would probably be better to just return a DTO.
If nothing makes sense, this error can also be caused by PHP Error that is embedded inside html/javascript, such as the one below
<br />
<b>Deprecated</b>: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in <b>C:\Projects\rwp\demo\en\super\ge.php</b> on line <b>54</b><br />
var zNodes =[{ id:1, pId:0, name:"ACE", url: "/ace1.php", target:"_self", open:true}
Not the <br /> etc in the code that are inserted into html by PHP is causing the error. To fix this kind of error (suppress warning), used this code in the start
error_reporting(E_ERROR | E_PARSE);
To view, right click on page, "view source" and then examine complete html to spot this error.
"Uncaught SyntaxError: Unexpected token" error appearance when your data return wrong json format, in some case, you don't know you got wrong json format.
please check it with alert(); function
onSuccess : function(resp){
alert(resp);
}
your message received should be: {"firstName":"John", "lastName":"Doe"}
and then you can use code below
onSuccess : function(resp){
var j = JSON.decode(resp); // but in my case i'm using: JSON.parse(resp);
}
with out error "Uncaught SyntaxError: Unexpected token"
but if you get wrong json format
ex:
...{"firstName":"John", "lastName":"Doe"}
or
Undefined variable: errCapt in .... on line<b>65</b><br/>{"firstName":"John", "lastName":"Doe"}
so that you got wrong json format, please fix it before you JSON.decode or JSON.parse
This happened to because I have a rule setup in my express server to route any 404 back to /# plus whatever the original request was. Allowing the angular router/js to handle the request. If there's no js route to handle that path, a request to /#/whatever is made to the server, which is just a request for /, the entire webpage.
So for example if I wanted to make a request for /correct/somejsfile.js but I miss typed it to /wrong/somejsfile.js the request is made to the server. That location/file does not exist, so the server responds with a 302 location: /#/wrong/somejsfile.js. The browser happily follows the redirect and the entire webpage is returned. The browser parses the page as js and you get
Uncaught SyntaxError: Unexpected token <
So to help find the offending path/request look for 302 requests.
Hope that helps someone.
I had the same problem and it turned out that the Json returned from the server
wasn't valid Json-P. If you don't use the call as a crossdomain call use regular Json.
My mistake was forgetting single/double quotation around url in javascript:
so wrong code was:
window.location = https://google.com;
and correct code:
window.location = "https://google.com";
In my case putting / at the beginning of the src of scripts or href of stylesheets solved the issue.
I got this error because I was missing the type attribute in script tag.
Initially I was using but when I added the type attribute inside the script tag then my issue is resolved
I got a "SyntaxError: Unexpected token I" when I used jQuery.getJSON() to try to de-serialize a floating point value of Infinity, encoded as INF, which is illegal in JSON.
In my case i ran into the same error, while running spring mvc application due to wrong mapping in my mvc controller
#RequestMapping(name="/private/updatestatus")
i changed the above mapping to
#RequestMapping("/private/updatestatus")
or
#RequestMapping(value="/private/updatestatus",method = RequestMethod.GET)
For me the light bulb went on when I viewed the source to the page inside the Chrome browser. I had an extra bracket in an if statement. You'll immediately see the red circle with a cross in it on the failing line. It's a rather unhelpful error message, because the the Uncaught Syntax Error: Unexpected token makes no reference to a line number when it first appears in the console of Chrome.
I did Wrong in this
`var fs = require('fs');
var fs.writeFileSync(file, configJSON);`
Already I intialized the fs variable.But again i put var in the second line.This one also gives that kind of error...
For those experiencing this in AngularJs 1.4.6 or similar, my problem was with angular not finding my template because the file at the templateUrl (path) I provided couldn't be found. I just had to provide a reachable path and the problem went away.
In my case it was a mistaken url (not existing), so maybe your 'send' in second line should be other...
This error might also mean a missing colon or : in your code.
Facing JS issues repetitively I am working on a Ckeditor apply on my xblock package. please suggest to me if anyone helping me out. Using OpenEdx, Javascript, xblock
xblock.js:158 SyntaxError: Unexpected token '=>'
at eval (<anonymous>)
at Function.globalEval (jquery.js:343)
at domManip (jquery.js:5291)
at jQuery.fn.init.append (jquery.js:5431)
at child.loadResource (xblock.js:236)
at applyResource (xblock.js:199)
at Object.<anonymous> (xblock.js:202)
at fire (jquery.js:3187)
at Object.add [as done] (jquery.js:3246)
at applyResource (xblock.js:201) "SyntaxError: Unexpected token '=>'\n at eval (<anonymous>)\n at Function.globalEval (http://localhost:18010/static/studio/common/js/vendor/jquery.js:343:5)\n at domManip (http://localhost:18010/static/studio/common/js/vendor/jquery.js:5291:15)\n at jQuery.fn.init.append (http://localhost:18010/static/studio/common/js/vendor/jquery.js:5431:10)\n at child.loadResource (http://localhost:18010/static/studio/bundles/commons.js:5091:27)\n at applyResource (http://localhost:18010/static/studio/bundles/commons.js:5054:36)\n at Object.<anonymous> (http://localhost:18010/static/studio/bundles/commons.js:5057:25)\n at fire (http://localhost:18010/static/studio/common/js/vendor/jquery.js:3187:31)\n at Object.add [as done] (http://localhost:18010/static/studio/common/js/vendor/jquery.js:3246:7)\n at applyResource (http://localhost:18010/static/studio/bundles/commons.js:5056:29)"
Late to the party but my solution was to specify the dataType as json. Alternatively make sure you do not set jsonp: true.
Try this to ignore this issue:
Cypress.on('uncaught:exception', (err, runnable) => {
return false;
});
Uncaught SyntaxError: Unexpected token }
Chrome gaved me the error for this sample code:
<div class="file-square" onclick="window.location = " ?dir=zzz">
<div class="square-icon"></div>
<div class="square-text">zzz</div>
</div>
and solved it fixing the onclick to be like
... onclick="window.location = '?dir=zzz'" ...
But the error has nothing to do with the problem..

Recommended way to find typos in JavaScript

I have developed a JavaScript file which I use in the context of a WordPress plugin. The jQuery contains a typo:
alert('prv_requestSelectionComplement check odds_pos for horse_id='+tmpSel.horse_id+' oddsPositionLimit='.JSON.stringify(oddsPositionLimit)+' odds_pos='+complement.odds_pos);
You see: Before JSON I used the PHP '.' instead of the JavaScript '+'.
I did not get any error nor warning. The function just stopped working. It took me a while to spot the problem with careful code review. Is there a possibility to get a reasonable error message without double checking all the places where I edited? For example using Firebug?
What is the recommended way to deal with this problem?
Try/Catch will help you:
try {
alert(this is an error);
}
catch (e){
console.log('There is a error: ' + e);
alert('There is a error: ' + e);
}
In this specific case you should get the following error within the Firebug or DevTools console:
" oddsPositionLimit=".JSON is undefined
This message already indicates that the error is located between your string and your JSON.stringify() call.
Note that 'string'.something is valid JavaScript syntax, because strings are objects in JavaScript and have some properties and values. So the error message does not refer to the dot between your string and JSON but says that the property JSON is not defined for the string " oddsPositionLimit=".

Javascript try-catch error output truncated

When attempting to run the following code:
try{
document.getElementsByClassName("aklsdjfaskldf")[0].outerHTML;
}catch(err){
alert("Function failed with error dump <"+err.message+">");
}
the error message displayed is truncated:
Function failed with error dump <document.getElementsByClassName(...)[0] is undefined>
Is there a way for the error message to be displayed in full, i.e. display the following message in Firefox? Chrome does not display the output, and therefore is not an issue for my current usage.
Function failed with error dump <document.getElementsByClassName("aklsdjfaskldf")[0] is undefined>
Every browser handles the error call stack differently, if you are on chrome you wont even see that string. It would simply say cannot invoke that outerHTML function on undefined. So better you check the value before invoking a function on that and then show the appropriate alert. Or you print the error.stack if you want to get a hint about the location of the code throwing this error.

[papaparse]Parse Error handler

I am having trouble getting the Papa error object into my error handler. My parse suddenly stopped working and I just want to work out why / what changed! I use the following code to parse it:
Papa.parse(path, {download: true, header: true, complete: ListifyCSVData, error: CSVParseError});
My CSVParseError function gets called. But the error object is undefined:
CSVParseError = function(err, file){
alert("Unable to process CSV file, please verify the file can be accessed and try again. Error reason was: " + err.code);
}
Does anyone have any tips for what might be wrong here please?
Thank you for your help.
Glen
It could be that there is a bug in the library, although I'm only guessing at this point.
Can you open an issue on GitHub and also show the exact error message you're getting? If it's a bug in Papa Parse we definitely want to fix it.

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