Pnpjs: TypeError: "NetworkError when attempting to fetch resource."

[Shmata]

Category

• [ ] Enhancement
• [ ] Bug
• [X] Question
• [ ] Documentation gap/issue

Version

Please specify what version of the library you are using: [ fetch.min.js version 2.0.3 and es6-promise.auto.js version 4.0.5 and pnp.min.js version 2.0.5 ]

Please specify what version(s) of SharePoint you are targeting: [ Sharepoint 2013 / On Perm / Service Pack 1 ]

Expected / Desired Behavior / Question

I try to update a custom list's item using code below
Everything works fine in IE and Chrome browsers but in Firefox (all versions), that doesn't update my selected item

` $("#s2-hr-reg").click(function(){
if( $("#dd-hr-check option:selected").val() != "عدم انتخاب" ){
$("#second-step-wrn").hide();
$pnp.sp.web.lists.getById("FAEF76D1-BAAB-47B2-AEFF-CC78F819C891").items.getById(parseInt(id)).update({
field31: $("#dd-hr-check").val(),
Desc12: $("#txt-hr-description").val(),
field32: $("#dd-hr-expert").val(),
CurrentState: _statusFlag,
AssignToId: _assign
}).then(function(items){
console.log(items);
$("#second-step-frm").show();
showAlertMessage().done(function(){
closeWindow();
})

            }).catch(function(e){
                console.log(e);
            })                  
        }else{
            $("#second-step-wrn").show();
            return false;
        }       


    })`

I encountered with below error in mozilla firefox

Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help http://xhr.spec.whatwg.org/ init.js:1:48659
TypeError: "NetworkError when attempting to fetch resource."

How can I fix it ?

[koltyakov]

Looks like something unrelated to the library but FireFox and Fetch specific.
Did you try the same without polyfills in FF?
Did you try if any raw Fetch requests works?

[Shmata]

I didn't try the same without polyfills in FF But I'll try and tell that result.

Yes I try raw Fetch requests and It works properly ( I attached screen shots ) .

[Shmata]

Dear @koltyakov , When I try the same without polyfills in FF nothing gonna happen . I got same results.
Can you guess what's wrong ??

[koltyakov]

Hard to say, PnPjs works for me in FF just well. This is definitely something outside the library or a setup specific. There are a lot of references to TypeError: "NetworkError when attempting to fetch resource." & FF over the internet. Some of them saying that the issue is related to CORS. Can it be that your code is executed outside SharePoint domain?

[patrick-rodgers]

Going to close this as answered. If you need to continue the conversation please _reopen_ the issue. Thanks!