Breaking Changes

• As announced previously, we're using ES Modules now! You'll need to convert your HTML Imports files to modules either manually, or using our modulizer tool.
• With the ES Module change, a lot of API names have shortened now that they don't use the Polymer global. Here's an example:
  • Before:

    <link rel="import" href="polymer/lib/utils/case-map.html">
    <script>Polymer.CaseMap</script>

    After:

    import {CaseMap} from "@polymer/polymer/lib/utils/case-map.js";

• However, Polymer.Element became PolymerElement, as Element would shadow over the native Element class.
• importHref() functionality is removed, please use the ES Module equivalent: import('path/to/module.js' )
  • Polymer CLI tooling and Webpack will automatically fix this up for browsers that don't support ES Modules.

Raw Notes

• use released versions of shadycss and webcomponentsjs (commit)

• Bump dependencies (commit)

• Run Chrome & FF serially to try and help flakiness (commit)

• Fix lint warning (commit)

• Bump to cli 1.7.0 (commit)

• Removing support for returning strings from template getter. (Per previous documented deprecation: https://www.polymer-project.org/2.0/docs/devguide/dom-template#templateobject) (commit)

• Fix typos and nits (commit)

• Update to Gulp 4 (commit)

• Add serve command to package.json and update package-lock.json (commit)

• Fix for browsers that don't have input.labels. (commit)

• Tweak introductory note, fix webpack capitalization (commit)

• gestures: Avoid spreading non-iterable in older browsers (commit)

• wip (commit)

• Readme: very small tweaks (commit)

• Tweak wording. (commit)

• Fix link (commit)

• Re-order sections (commit)

• Fix LitElement typo (commit)

• Depend on polymer-cli rather than wct (commit)

• Minor tweaks (commit)

• Update README for 3.x (commit)

• Update Edge testing versions. (commit)

• Exclude all Edge versions from keyframe/font tests. (commit)

• Update wcjs version. (commit)

• Add .npmignore file (#5215) (commit)

• Use node 9 (commit)

• Use module flags for wct (commit)

• Use babel parser for aslant for dynamic import. (commit)

• Fix lint errors. (commit)

• 3.0.0-pre.13 (commit)

• [package.json] Remove version script (commit)

• Update dependencies (commit)

• Fix test typo on Chrome (commit)

• Fixes IE11 test issues (commit)

• Fixes styling tests related to using HTML Imports (commit)

• Remove crufty global (fixes globals.html test) (commit)

• Update to webcomponents 2.0.0 and webcomponents-bundle.js (commit)

• Fix meaningful whitespace in test assertion (commit)

• Fix latent mistake using old SD API (commit)

• Add global for wct callback when amd compiling (commit)

• Eliminate pre-module code from resolveUrl tests (commit)

• Improve documentation and legibility. (commit)

• Add some global whitelists (commit)

• Fix references to js files instead of html files (commit)

• Fix glob patterns for eslint (commit)

• Fix ESLint warnings (commit)

• Eliminate more canonical path usage (commit)

• Eliminate canonical path to wcjs (commit)

• Remove extra polymer-legacy.js imports (commit)

• Clean up Polymer fn import (commit)

• Add WCT config used by all tests (commit)

• Clean up exports (commit)

• Allow Polymer fn's call to Class to be overridden. (commit)

• add sill-relevant, deleted tests back in (commit)

• manually change inter-package dep imports from paths to names (commit)

• manually add assetpath (import.meta.url) for tests that require it (commit)

• move behavior definition to before usage (commit)

• define omitted class declaration (commit)

• remove < and replace with < for innerHTML (commit)

• fixed typo causing test to fail (commit)

• fix missing dom-module in modulization (commit)

• revert module wait (commit)

• wait for elements in other modules to be defined (commit)

• no more undefined.hasShadow (commit)

• removed link rel import type css tests (commit)

• delete debugger (commit)

• skip link rel import type css tests on native imports (commit)

• add missing css html import (commit)

• remove importHref tests (commit)

• Import Polymer function in tests from legacy/polymer-fn.js (commit)

• Export Polymer function from polymer-legacy.js (commit)

• Add new wct deps. (commit)

• Fixup a few places where comments were misplaced. (commit)

• Fixup license comments. (commit)

• Update package.json from modulizer's output, set polymer-element.js as main. (commit)

• Replace sources with modulizer output. (commit)

• Rename HTML files to .js files to trick git's rename detection. (commit)

• Delete typings for now. (commit)

• Add reasoning for suppress missingProperties (commit)

• Don't rely on dom-module synchronously until WCR. (commit)

• Avoid closure warnings. (commit)

• Add ability to define importMeta on legacy elements. Fixes #5163 (commit)

• Allow legacy element property definitions with only a type. Fixes #5173 (commit)

• Update docs. (commit)

• Use Polymer.ResolveUrl.pathFromUrl (commit)

• Fix test under shadydom. Slight logic refactor. (commit)

• Fix lint warning (commit)

• Add importMeta getter to derive importPath from modules. Fixes #5163 (commit)

• Reference dependencies as siblings in tests. (commit)

• Update types (commit)

• Add note about performance vs correctness (commit)

• Update types. (commit)

• Lint clean. (commit)

• Pass through fourth namespace param on attributeChangedCallback. (commit)

• Add a @const annotation to help the Closure Compiler understand that Polymer.Debouncer is the name of a type. (commit)

• [ci skip] update changelog (commit)

• Update docs and types (commit)

• Update perf test to use strict-binding-parser (commit)

• Correct import paths (commit)

• Only store method once for dynamic functions (commit)

• Move strict-binding-parser to lib/mixins (commit)

• Rename to StrictBindingParser (commit)

• Fix linter errors (commit)

• Extract to a mixin (commit)

• Add missing dependency to bower.json (commit)

• Fix linter warning (commit)

• Add documentation (commit)

• Add performance test for binding-expressions (commit)

• Rewrite parser to use switch-case instead of functions (commit)

• Remove escaping from bindings (commit)

• Fix linter warning (commit)

• Refactor to be functional and add more tests (commit)

• Fix linter warnings (commit)

• Rewrite expression parser to state machine (commit)