[8] Other notable users include Netflix, Electronics Arts, Comcast, Nuxeo, Coca-Cola, McDonald's, BBVA, IBM, Interxion and General Electric.

Public development of Polymer began in November 2013 with the release of a Promises Polyfill.

[9] Google continued to revise the design of Polymer after the release of 0.5, with special consideration given to the performance issues a number of developers found.

[16] LitElement was developed by the Google Chrome team as part of the Polymer project in 2018.

Custom elements can be created using ES (ECMAScript, most commonly JavaScript) modules with classes.