call define conditionally #1
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I'm working on a component library built with Stencil JS that is using focus trap and I ran into stenciljs/core#1782 trying to setup prerendering with Stencil. When Stencil prerenders it loads the focus trap code and dies on the call to
window.customElements.definewhich doesn't exist.Fortunately it is pretty easy to avoid this by wrapping the
window.customElements.definecall in a check to make surewindow.customElementsexists first. This solves the issue with prerendering with Stencil so I decided to make a PR.