I'm using lightning:fileUpload inside a lightning component and I'm testing it on a public site, but when I attach a file/files the modal box with the Done button doesn't show up. When I'm testing that component in the salesforce app builder is running as expected. Why that could happen?

                <lightning:fileUpload label="Attach receipt"
                                      accept=".pdf, .png"
                                      onuploadfinished="{!c.handleUploadFinished}" >

That means that the onuploadfinished function never executes. The same thing happens if you try to put an HTML tag inside the component (for ex. iframe, input type="file").


As per documentation(https://developer.salesforce.com/docs/component-library/bundle/lightning:fileUpload/documentation), for the community site user, we need to enable the org preference Allow site guest users to upload files. To enable this, go to Setup > General Settings, and select Allow site guest users to upload files. One more thing this component is not supported in Lightning Out or standalone apps, and displays as a disabled input. So if your site using lightning out to use this component then this will not work.

  • My app is a standalone app. How can I make the upload function work there? I tried to create a VFP and interact with the component through message exchange, but the VFP is never loaded inside the iframe, because HTML tags never rendered. – Alex Andreadis Apr 24 '19 at 8:34
  • If you read the document correctly, it mentioned This component is not supported in Lightning Out or standalone apps, and displays as a disabled input. – Pragati Jain Apr 24 '19 at 8:38
  • Yeah, I understood, I asked if there is any other way to do that? How can I let a user upload a file from a standalone app? – Alex Andreadis Apr 24 '19 at 8:48
  • You can create a custom lightning component for this and can take help from this example sfdcmonkey.com/2017/09/25/file-upload-lightning-component – Pragati Jain Apr 24 '19 at 9:14

Did the same problem when trying to use LWC file upload on Salesforce sites why can't I use 'markup: // forceContent / *' in <aura: dependency> of my <aura: application>, so I can't use <lightning-file-upload>.

The solution for me was to create my own file upload, maybe it will help you or help someone ...


<lightning-input type="file" label="File Upload" onchange={saveFileHandle}></lightning-input>


    let fileList = event.detail.files;

    [...fileList].forEach(file => {
        let fileReader = new FileReader();
        file.sObjectId = this.leadId;

        fileReader.onload = function() {
            let fileContents = fileReader.result;
            let base64Mark = 'base64,';
            let dataStart = fileContents.indexOf(base64Mark) + base64Mark.length;
            fileContents = fileContents.substring(dataStart);

                parentId: file.sObjectId,
                fileName: file.name,
                base64Data: encodeURIComponent(fileContents)
            .then(result => {
            .catch(error => {

//Controller Apex

public static void saveFile(Id parentId, String fileName, String base64Data) { 
    base64Data = EncodingUtil.urlDecode(base64Data, 'UTF-8');

    //Insert ContentVersion
    ContentVersion contentVersion = new ContentVersion();
    contentVersion.ContentLocation = 'S'; //S-Document is in Salesforce. E-Document is outside of Salesforce. L-Document is on a Social Netork.
    contentVersion.PathOnClient = fileName;//File name with extention
    contentVersion.Origin = 'C';//C-Content Origin. H-Chatter Origin.
    contentVersion.OwnerId = UserInfo.getUserId();//Owner of the file
    contentVersion.Title = fileName;//Name of the file
    contentVersion.VersionData = EncodingUtil.base64Decode(base64Data);//File content
    Insert contentVersion;

    //After saved the Content Verison, get the ContentDocumentId
    Id contentDocumentId = [SELECT ContentDocumentId FROM ContentVersion WHERE Id =:contentVersion.Id].ContentDocumentId;

    //Insert ContentDocumentLink
    ContentDocumentLink contentDocumentLink = new ContentDocumentLink();
    contentDocumentLink.ContentDocumentId = contentDocumentId;//Add ContentDocumentId
    contentDocumentLink.LinkedEntityId = parentId;//Add attachment parentId
    contentDocumentLink.ShareType = 'I';//V - Viewer permission. C - Collaborator permission. I - Inferred permission.
    contentDocumentLink.Visibility = 'AllUsers';//AllUsers, InternalUsers, SharedUsers
    Insert contentDocumentLink;

You can adapt your code to the .

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.