javascript project facet name?

Would somebody let me know what is the name of JavaScript facet (not nature) in Eclipse? I found name of "Dynamic Web Module" facet i.e, "jst.web" but could not find for JavaScript. I have to add it as required facets in my facet.

Here is relevant fragment开发者_如何转开发 of my plugin.xml:

<project-facet-version facet="mytool" version="1.0">
    <constraint>
        <requires facet="jst.web" version="3.0"/> <!-- Dynamic Web Module -->
        <requires facet="???????" version="1.0"/> <!-- JavaScript Project -->
    </constraint>
    <action type="INSTALL" id="mytool.install">
        <config-factory class="mytool.MyFacetInstallConfig$Factory"/>
        <delegate class="mytool.MyFacetInstallDelegate"/>
    </action>
</project-facet-version>

---

Do you mean the JavaScript nature? That's "org.eclipse.wst.jsdt.core.jsNature".

To add a given nature, you need the IProject for a given projject, and then get its IProjectDescription. Create a String array with all the existing natures plus your new one[s], and set that back into the project description. Finally, set the description back into the project (which triggers an update IIRC, even though you're using the exact same object).

---

Got it. It's wst.jsdt.web.
Thank you everybody who has spent time to find the answer.