![]() ![]() The text inside the delimiters can be one of the following: See Data flow for information on two-way binding and upward data flow. The right-hand side of the binding consists of either a binding annotation or a compound binding: Binding annotation Text surrounded by double curly bracket ( Automatic bindings allow upward and downward data flow. This example binds to the anchor element's href attribute. To bind to an attribute instead, use the attribute name followed by $: This example binds to the target property, myProperty on. To bind to a property, use the property name in attribute form (dash-case notĬamelCase), as described in Property name to attribute name The left-hand side of the binding identifies the target property or attribute. Anatomy of a data bindingĪ data binding appears in the local DOM template as an HTML attribute: property-name = annotation-or-compound-binding attribute-name $= annotation-or-compound-binding Updating data bindings is a property effect. You create data bindings by adding annotations to an element's local DOM template. The host element data can be a property or sub-property represented by aĭata path, or data generated based on one or more paths. (the host element) to a property or attribute of an element in its local DOM (the child Theming with custom properties About this release What's new in 2.0 Upgrade guide Hybrid elements Release notes Custom elements Custom element concepts Define an element Declare properties Shadow DOM & styling Shadow DOM concepts DOM templating Style shadow DOM Custom CSS properties Events Handle and fire events Gesture events Data system Data system concepts Work with object and array data Observers and computed properties Data binding Helper elements Browser support Overview Polyfills ES6 Tools Tools overview Polymer CLI CLI commands Create an element project Create an application project Document your elements Test your elements Publish your elements Web services polymer.json specification Node support Build apps Overview App templates Responsive app layout Routing Localization App storage Service worker Build for production Serve your app The PRPL pattern Shop App Case Study News App Case Study Resources Glossary Global settings API Reference index Elements Polymer.ArraySelector Polymer.CustomStyle Polymer.DomBind Polymer.DomIf Polymer.DomModule Polymer.DomRepeat Polymer.Element Classes Polymer.Debouncer Polymer.DomApi Polymer.FlattenedNodesObserver Mixins Polymer.ArraySelectorMixin Polymer.DirMixin Polymer.ElementMixin Polymer.GestureEventListeners Polymer.LegacyElementMixin Polymer.MutableData Polymer.OptionalMutableData Polymer.PropertiesChanged Polymer.PropertiesMixin Polymer.PropertyAccessors Polymer.PropertyEffects Polymer.TemplateStamp Functions Polymer.Class dupingMixin Polymer.dom Polymer.enqueueDebouncer Polymer.flush Polymer.html Polymer.htmlLiteral Polymer.importHref Polymer.mixinBehaviors tLegacyOptimizations tPassiveTouchGestures tRootPath tSanitizeDOMValue Namespaces Polymer.ArraySplice Polymer.Async Polymer.CaseMap Polymer.dom Polymer.Gestures Polymer.Path Polymer.RenderStatus Polymer.ResolveUrl Polymer.Settings Polymer.StyleGather Polymer.telemetry Polymer.TemplatizeĪ data binding connects data from a custom element Home Guides Feature overview Try Polymer Install Polymer 2.x Tutorial: Build an element 1. ![]()
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