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Failed to execute 'define' on 'CustomElementRegistry': this name has already been used with this registry #2

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Failed to execute 'define' on 'CustomElementRegistry': this name has already been used with this registry#2

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@allthesignals
allthesignals
opened on Jul 27, 2018

Not sure what's going on here, followed instructions according to this thread https://github.com/Polymer/polymer-starter-kit/issues/1123#issuecomment-408453390. Could this be related to the web component?

bundle.js:4863 Uncaught (in promise) DOMException: Failed to execute 'define' on 'CustomElementRegistry': this name has already been used with this registry
    at Object.<anonymous> (http://127.0.0.1:8081/node_modules/@ggcity/leaflet-map/dist/bundle.js:4863:43)
    at t (http://127.0.0.1:8081/node_modules/@ggcity/leaflet-map/dist/bundle.js:9:17)
    at Object.<anonymous> (http://127.0.0.1:8081/node_modules/@ggcity/leaflet-map/dist/bundle.js:4489:11)
    at t (http://127.0.0.1:8081/node_modules/@ggcity/leaflet-map/dist/bundle.js:9:17)
    at Object.<anonymous> (http://127.0.0.1:8081/node_modules/@ggcity/leaflet-map/dist/bundle.js:4412:11)
    at t (http://127.0.0.1:8081/node_modules/@ggcity/leaflet-map/dist/bundle.js:9:17)
    at Object.<anonymous> (http://127.0.0.1:8081/node_modules/@ggcity/leaflet-map/dist/bundle.js:4321:11)
    at t (http://127.0.0.1:8081/node_modules/@ggcity/leaflet-map/dist/bundle.js:9:17)
    at http://127.0.0.1:8081/node_modules/@ggcity/leaflet-map/dist/bundle.js:28:16
    at http://127.0.0.1:8081/node_modules/@ggcity/leaflet-map/dist/bundle.js:29:3

Activity

  1. mooman commented on Jul 27, 2018

    @mooman
    mooman
    on Jul 27, 2018
    Member

    This library was written with Preview version of Polymer 3 and hasn't been tested outside that ecosystem, unfortunately. I'm not too sure of your environment, but I'm betting it's probably that? Especially, the bundle.js was compiled with Polymer 3 preview...

    I would try to compile it with your project with the newer version of Polymer.

    There are plans in place to upgrade this to the stable version 3 or exploring lit-element.

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