I am an old CEWP user. Haven't used SharePoint in years.

For a new Online project I have been asked to explore if my team (some 50+ autistic people with distance to the labor market) can work on a Microsoft365 environment.

All I can find is blogs that require the whole React toolchain.
My team has basic HTML and JavaScript skills, I can't teach them this React voodoo, they understand native Web Components (as its basic HTML and JS skills)

Only CEWP like reference I could find is: 2019: https://spjsblog.com/modern-cewp/
But has several issues and no long maintained

Is it no longer possible to include JavaScript in a page like this ?

// comes from one CDN file
customElements.define("copy-right", class extends HTMLElement{
    this.innerHTML = `Copyright ACME - 2022`;


1 Answer 1


Unfortunately, there is no SharePoint out of the box web part using which you can add JavaScript to modern pages.

You have below two options:

  1. If you are trying to add custom JavaScript to all modern pages, you can use SPFx application customizer to inject custom JavaScript/CSS. Follow for more information: How can I include the same JS and CSS files on multiple SharePoint Modern Page?

  2. If you are trying to add custom JavaScript to individual modern pages, you can use modern script editor web part

    Check this web part: Script editor web part for modern pages

Note: DOM manipulation & CSS customizations are not recommended by Microsoft and some of your customization may break if Microsoft changes HTML element id/classes in new release updates.

  • Interesting answers, where did good old CSR go... SPFX is voodoo to me as well; can't I buy an extension? If I read the second link, all I need is: Upload .sppkg file from sharepoint\solution to your tenant App Catalog Commented Sep 23, 2022 at 18:33
  • CSR is supported in classic experience but not in moder experience. You need to download the code from second link then generate .sppkg package and deploy the package to app catalog Commented Sep 23, 2022 at 18:58
  • Also, you can use JavaScript, jQuery, Angular, Vue.js, Knockout or any other JavaScript framework with SPFx. But you will find more examples, blogs/articles related to using react. Commented Sep 23, 2022 at 19:25

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