CODEWITHSUNDEEP
polymerweb-componentpolymer-2.xpolymer-3.x
Marc
Marc

Reputation: 21

Use Polymer 2.0 component in Polymer 3.0 app

Currently I migrate a Polymer 2.0 app to Polymer 3.0. But at the moment understandably a lot of components are still not migrated, yet (like e.g vaadin-gid as one example).

How can I use these Polymer 2 components in my migrated Polymer 3 app?

Upvotes: 2

Views: 860

Answers (2)

Jose Pedro Dava
Jose Pedro Dava

Reputation: 63

my solutions was upgrade the polymer 2.0 elements to polymer 3.0, using polymer-modulizer

[https://polymer-library.polymer-project.org/3.0/docs/upgrade][1]

Upvotes: 0

HerberthObregon
HerberthObregon

Reputation: 2111

basicly add this code in <head> and delete /bower_components/polymer folder

<script type="module">
        import {PolymerElement} from '@polymer/polymer/polymer-element.js';

        window.Polymer = {
            Element: PolymerElement
        };

        window.loadElement = function(filename) {
            var l = document.createElement('link');
            l.rel = 'import';
            l.href = filename
            var h = document.getElementsByTagName('head')[0];
            h.parentNode.insertBefore(l, h);
        }
        // Load de main element
        loadElement('/main-poly2.html');
</script>

load polymer 3 elements in polymer 2

<script type="module">
        import './poly3-element'

        class MainPoly2 extends Polymer.Element {
            ...
        }
</script>

load polymer 2 elements in polymer 3

import {PolymerElement, html} from '/node_modules/@polymer/polymer/polymer-element.js';
loadElement('/poly2-element.html');

class Poly3Element extends PolymerElement {
    ....
}

I write a example in:

https://github.com/herberthobregon/polymer2-3

It works but the polymer team has not answered me if the implementation is correct, but works

Upvotes: 1

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