I need to inject some javascript into all sharepoint online communication site collection pages. I managed to do it in Team site by adding javascript file link in to a master page, but cannot find the way to do it in communication site. I found master page in communication site and managed to add my javascript file link to it, but it seems to only work on system pages (sharepoint site settings etc) . I did see some articles where its done by creating SPFX sharepoint app and importing it into the site, but doing all that just to add few lines of javascript (comparing to just adding a link into master page) seems crazy .

  • What type of customisation are you trying to implement? Dec 6, 2020 at 0:00
  • need to capture some usage data and log it into SP List Jan 5, 2021 at 21:27
  • Is there a reason you aren't using the Site Usage information collected by SharePoint out of the box? Jan 5, 2021 at 21:43

1 Answer 1


You could add all you js code into js file and use SPFX extension to import them into SharePoint Online.

export interface IInjectCssApplicationCustomizerProperties {
  jsurl: string;

export default class InjectCssApplicationCustomizer
  extends BaseApplicationCustomizer<IInjectCssApplicationCustomizerProperties> {

  public onInit(): Promise<void> {
    Log.info(LOG_SOURCE, `Initialized ${strings.Title}`);

    const jsurl: string = this.properties.jsurl;
    if (jsurl) {
        // inject the style sheet
        const head: any = document.getElementsByTagName("head")[0] || document.documentElement;
        let customJs:HTMLScriptElement = document.createElement("script");
        head.insertAdjacentElement("beforeEnd", customJs);

    return Promise.resolve();

You could full project here:https://github.com/Amos-MSFT/SharePoint-FrameWork-Demos/tree/master/react-application-injectjs-master

The jsurl is configured in elements.xml.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

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