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[I am trying to fetch my email messages through Graph API into the webpart in sharepoint framework]

In the webpart Not getting the details of my emails through Graph API

Error : Cannot read property of 'value' of null

This property of 'value' is defined in the function "this._renderEmailList(messages.value)"

enter image description here

private _renderEmailList(messages: MicrosoftGraph.Message[]): void {
let html: string = '';
for (let index = 0; index < messages.length; index++) {
  html += `<p class="${styles.description}">Email ${index + 1} - ${escape(messages[index].subject)}</p>`;
}

// Add the emails to the placeholder
const listContainer: Element = this.domElement.querySelector('#spListContainer');
listContainer.innerHTML = html;

}

I have call that function in the render function

public render(): void {
this.context.msGraphClientFactory
.getClient()
.then((client: MSGraphClient): void => {
  // get information about the current user from the Microsoft Graph
  client
  .api('/me/messages')
  .top(5)
  .orderby("receivedDateTime desc")
  .get((error, messages: any, rawResponse?: any) => {

    this.domElement.innerHTML = `
    <div class="${ styles.myFirstGraphWebPart}">
    <div class="${ styles.container}">
      <div class="${ styles.row}">
        <div class="${ styles.column}">
          <span class="${ styles.title}">Welcome to SharePoint!</span>
          <p class="${ styles.subTitle}">Use Microsoft Graph in SharePoint Framework.</p>
          <div id="spListContainer" />
        </div>
      </div>
    </div>
    </div>`;

    // List the latest emails based on what we got from the Graph
    this._renderEmailList(messages.value);

  });
});

}

1
  • Check if the variable 'messages' is null.
    – Amos
    Feb 5, 2021 at 7:52

1 Answer 1

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I think you need to use the full graph URL in your .api call instead of .api("/me/messages") try .api("https://graph.microsoft.com/v1.0/me/messages")

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