Bump @polymer/polymer from 3.3.1 to 3.4.1

[dependabot-preview]

Bumps @polymer/polymer from 3.3.1 to 3.4.1.

Release notes

Sourced from @polymer/polymer's releases.

v3.4.0

New global settings

This update to Polymer includes some new global settings:

• legacyUndefined / setLegacyUndefined

  What does it do? This setting reverts how computed properties handle undefined values to the Polymer 1 behavior: when enabled, computed properties will only be recomputed if none of their dependencies are undefined.

  Components can override the global setting by setting their _overrideLegacyUndefined property to true. This is useful for reenabling the default behavior as you migrate individual components:

  import {PolymerElement, html} from '@polymer/polymer/polymer-element.js';
  class MigratedElement extends PolymerElement { /* ... */ }
  // All MigratedElement instances will use the default behavior.
  MigratedElement.prototype._overrideLegacyUndefined = true;
  customElements.define('migrated-element', SomeElement);

  Should I use it? This setting should only be used for migrating legacy codebases that depend on this behavior and is otherwise not recommended.

• legacyWarnings / setLegacyWarnings

  What does it do? This setting causes Polymer to warn if a component's template contains bindings to properties that are not listed in that element's properties block. For example:

  import {PolymerElement, html} from '@polymer/polymer/polymer-element.js';
  class SomeElement extends PolymerElement {
    static get template() {
      return html`<span>[[someProperty]] is used here</span>`;
    }
    static get properties() {
      return { /* but `someProperty` is not declared here */ };
    }
  }
  customElements.define('some-element', SomeElement);

  Only properties explicitly declared in the properties block are associated with an attribute and update when that attribute changes. Enabling this setting will show you where you might have forgotten to declare properties.

  Should I use it? Consider using this feature during development but don't enable it in production.

• orderedComputed / setOrderedComputed

  What does it do? This setting causes Polymer to topologically sort each component's computed properties graph when the class is initialized and uses that order whenever computed properties are run.

  For example:

  import {PolymerElement, html} from '@polymer/polymer/polymer-element.js';

... (truncated)

Changelog

Sourced from @polymer/polymer's changelog.

v3.4.1 (2020-04-29)

• [ci skip] bump to 3.4.1 (commit)

• Add type for DomApiNative's setAttribute method. (commit)

• Remove gen-typescript-declarations; manually add LegacyElementMixin's setAttribute type. (commit)

• Remove "DO NOT EDIT" warning comments. (commit)

• Track TypeScript declarations. (commit)

• Update Closure types for overridden setAttribute in LegacyElementMixin. (commit)

• Add method / parameter descriptions. (commit)

• Fix TypeScript breakages by specifying types for overridden setAttribute and getAttribute. (commit)

• Add complete commit list for v3.4.0 (commit)

• Fix a couple more compiler warnings (commit)

• Typos and other minor changes. (commit)

• Add a note about a bug fix for chunking. (commit)

• Add useAdoptedStyleSheetsWithBuiltCSS section. (commit)

• Add setters to settings titles. (commit)

• Add a note about orderedComputed and cycles. (commit)

• Add example of overriding suppressTemplateNotifications via notify-dom-change. (commit)

• Add a section about automatic use of constructable stylesheets. (commit)

• Add "Other new features" section for reuseChunkedInstances and LegacyElementMixin's built-in disable-upgrade support. (commit)

• Added notes for fastDomIf, removeNestedTemplates, suppressNestedTemplates, and suppressTemplateNotifications. (commit)

• Started on release notes for legacyUndefined, legacyWarnings, orderedComputed. (...) (commit)

• Remove unused externs. (commit)

v3.4.0 (2020-04-23)

New global settings

This update to Polymer includes some new global settings:

• legacyUndefined / setLegacyUndefined

... (truncated)

Commits

• 9bdaf4b 3.4.1
• 12fa1b5 [ci skip] bump to 3.4.1
• 1075dde Merge pull request #5654 from Polymer/DomApiNative-setAttribute-type
• 024ab01 Add type for DomApiNative's setAttribute method.
• 36fb37e Merge pull request #5653 from Polymer/remove-gen-tsd
• e717f0f Remove gen-typescript-declarations; manually add LegacyElementMixin's setAttr...
• 8b2ea7b Remove "DO NOT EDIT" warning comments.
• ec7b7c5 Track TypeScript declarations.
• 39d5a95 Merge pull request #5652 from Polymer/setAttribute-closure-types
• 604856b Update Closure types for overridden setAttribute in LegacyElementMixin.
• Additional commits viewable in compare view

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