The library follows HTML specification and properly transforms attribute to boolean and string values. An attribute value is used only once when element is connected. Attribute FallbackĪll types except object and undefined create a fallback connection to element attribute (dashed name of the property key). To omit transform, defaultValue has to be set to undefined. Moreover, defaultValue is shared between custom element instances, so it should not be changed by any of them. Object values are frozen to prevent mutation of the own properties, which does not invalidate cached value. defaultValue can be a transform function itself, which is called when a property value is set. ![]() For example, when defaultValue is set to "text", String function is used. Type of the passed defaultValue is used to detect transform function. property uses a transform function, which ensures the strict type of the value set by an attribute or a property. Property creates property binding with fallback to corresponding element's attribute. hybrid property descriptor, which resolves to value.connect - a connect callback function of the property descriptor.Property property(defaultValue: any, ): Object hybrids includes four factories, which cover the most important features for creating custom elements. Rather than explicitly describe the property, factories hide implementation details and minimize redundant code. The factory is a function, which produces hybrid property descriptor. It means, that custom element definition can be just a simple structure of default values and methods without external dependencies. Object descriptor passed to the define method is not changed and it stays as it was defined. The library calls shims if they are needed, so direct use is not required. Read more on the known issues and custom properties shim limitations pages. Especially, webcomponents/shadycss approximates CSS scoping and CSS custom properties inheritance. Web components shims have some limitations. Javascript// Promise and nstruct polyfills loaded if IE11 is detected// Web Components shims and polyfills (external packages)import 'hybrids/shim'. ![]() The easiest way is to add the following code on top of your project: ![]() You can use hybrids in all evergreen browsers and IE11 including list of required polyfills and shims. The library requires Promise and nstruct APIs and Shadow DOM, Custom Elements, and Template specifications. You can also use the built version of the library (with hybrids global namespace): ```htmlįor the built version all name exports of the hybrids are available on the hybrids global namespace. The recommended way is to use the npm registry:```bashnpm install hybrids or The library supports Hot Module Replacement - custom elements are live updated without the need to refresh the page. Without external tools, with built-in result caching and using tagged template literals, hybrids gives you all power to create views with JavaScript included. Property value is cached by default and recalculated only when related properties changes, which makes the library super fast! The library says no to will and did - properties are independent and only have connect callback in the definition (with support for returned disconnect callback). Hybrid property descriptors can be re-used, merged or split between the definitions and many more (for example using object rest/spread properties). Rather than using class and this syntax, the library uses plain objects with property descriptors and pure functions for defining custom elements. Playground powered by ⚡StackBlitz Key Features UI library for creating Web Components with simple and functional API
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