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[ivx](https://github.com/localvoid/ivx) \u0026middot; [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/localvoid/ivx/blob/master/LICENSE) [![codecov](https://codecov.io/gh/localvoid/ivx/branch/master/graph/badge.svg)](https://codecov.io/gh/localvoid/ivx) [![CircleCI Status](https://circleci.com/gh/localvoid/ivx.svg?style=shield\u0026circle-token=:circle-token)](https://circleci.com/gh/localvoid/ivx) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/localvoid/ivx)\n\nivx is an extremely fast functional HTML string renderer.\n\n|packages|NPM version                                                                                        |\n|--------|---------------------------------------------------------------------------------------------------|\n|ivx     |[![npm version](https://img.shields.io/npm/v/ivx.svg)](https://www.npmjs.com/package/ivx)          |\n|ivx-html|[![npm version](https://img.shields.io/npm/v/ivx-html.svg)](https://www.npmjs.com/package/ivx-html)|\n|ivx-svg |[![npm version](https://img.shields.io/npm/v/ivx-svg.svg)](https://www.npmjs.com/package/ivx-svg)  |\n\n## Features\n\n- Immutable Virtual DOM Nodes\n- Implicit data propagation with contexts\n- Connectors for sideways data loading\n- Diff/Patch renderer\n\n## Basic Example\n\n```js\nimport { render } from \"ivx\";\nimport { div } from \"ivx-html\";\n\nrender(div(\"message\").c(\"Hello World!\"));\n// =\u003e \u003cdiv class=\"message\"\u003eHello World\u003c/div\u003e\n```\n\n## API\n\n### Virtual DOM\n\n#### HTML/SVG Elements\n\nHTML and SVG elements are created with predefined factory functions.\n\n- `ivx-html` package provides factories for HTML elements.\n- `ivx-svg` package proived factories for SVG elements.\n\n```ts\ninterface VNode {\n  a(attrs: { [key: string]: any } | null): this;\n  s(style: { [key: string]: any } | null): this;\n  c(children: VNodeChildren): this;\n}\n\ntype VNodeChildren = VNodeChildrenArray | VNode\u003cany\u003e | string | number | null;\ninterface VNodeChildrenArray extends Array\u003cVNodeChildren\u003e { }\n```\n\nHTML and SVG elements have three methods:\n\n`a()` method is used to assign attributes.\n\n`s()` method is used to assign styles.\n\n`c()` method is used to assign children nodes.\n\n#### Raw Text\n\nRaw text is used to inject any text into the document without any escaping.\n\n```ts\nfunction raw(text: string): VNode\u003cnull\u003e;\n```\n\n#### Custom Elements\n\n```ts\ninterface ElementOptions {\n  readonly void?: boolean;\n  readonly attrs?: {};\n}\nfunction element\u003cT\u003e(tagName: string, options?: ElementOptions): (className?: string) =\u003e VNode\u003cT\u003e;\n```\n\n`element()` function creates a factory function for custom elements.\n\n#### Components\n\n```ts\nfunction component(render: () =\u003e VNodeChildren): () =\u003e VNode\u003cundefined\u003e;\nfunction component\u003cP\u003e(\n  render: undefined extends P ? (props?: P) =\u003e VNodeChildren : (props: P) =\u003e VNodeChildren,\n): undefined extends P ? (props?: P) =\u003e VNode\u003cP\u003e : (props: P) =\u003e VNode\u003cP\u003e;\n```\n\n`component()` function creates a factory function for components.\n\n```ts\nconst A = component\u003c{ text: string }\u003e(\n  (props) =\u003e div().c(props.text),\n);\n\nrender(\n  A({ text: \"Hello\" }),\n);\n// =\u003e \u003cdiv\u003eHello\u003c/div\u003e\n```\n\n##### Should Update hint\n\n```ts\nfunction withShouldUpdate\u003cP\u003e(\n  shouldUpdate: (prev: P, next: P) =\u003e boolean,\n  c: (props: P) =\u003e VNode\u003cP\u003e,\n): (props: P) =\u003e VNode\u003cP\u003e;\n```\n\n`withShouldUpdate()` function creates a factory function for components with should update hint.\n\n```ts\nconst A = withShouldUpdate\u003c{ text: string }\u003e(\n  (prev, next) =\u003e prev.text !== next.text,\n  component(\n    (props) =\u003e h.div().c(props.text),\n  ),\n);\n```\n\n#### Context and Connectors\n\n```ts\nfunction context\u003cT\u003e(ctx: T, children: VNodeChildren): VNode\u003cT\u003e;\n\nfunction connect\u003cT\u003e(\n  select: (prev: T | null) =\u003e T,\n  render: (props: T) =\u003e VNodeChildren,\n): () =\u003e VNode\u003cundefined\u003e;\nfunction connect\u003cT, P\u003e(\n  select: undefined extends P ? (prev: T | null, props?: P) =\u003e T : (prev: T | null, props: P) =\u003e T,\n  render: (props: T) =\u003e VNodeChildren,\n): undefined extends P ? () =\u003e VNode\u003cP\u003e : (props: P) =\u003e VNode\u003cP\u003e;\nfunction connect\u003cT, P, C\u003e(\n  select: (prev: T | null, props: P, context: C) =\u003e T,\n  render: (props: T) =\u003e VNodeChildren,\n): undefined extends P ? () =\u003e VNode\u003cP\u003e : (props: P) =\u003e VNode\u003cP\u003e;\n```\n\nConnector is a specialized `VNode` that have access to the current context. `connect()` function creates a factory\nfunction for connectors.\n\n`context()` function creates a `VNode` that will modify current context for its `children`.\n\n```ts\nconst Connector = connect\u003cstring, undefined, { result: string }\u003e(\n  (prev, props, context) =\u003e {\n    const result = context.result;\n\n    return (prev !== null \u0026\u0026 prev === result) ? prev :\n      result;\n  },\n  (text) =\u003e div().c(text),\n);\n\nrender(\n  context({ result: \"Hello World!\" },\n    Connector(),\n  ),\n);\n// =\u003e \u003cdiv\u003eHello World!\u003c/div\u003e\n```\n\n### Render to String\n\n```ts\nfunction render(\n  node: VNode\u003cany\u003e,\n  context: {} = {},\n): string;\n```\n\n`render()` function renders Virtual DOM into a string.\n\n### Blueprints\n\n```ts\nfunction createBlueprint(\n  node: VNode\u003cany\u003e,\n  context: {} = {},\n): BlueprintNode;\n```\n\n`createBlueprint()` function creates a blueprint that can be used to optimize rendering.\n\n```ts\nfunction renderWithBlueprint(\n  node: VNode\u003cany\u003e,\n  blueprint: BlueprintNode,\n  context: {} = {},\n): string;\n```\n\n`renderWithBlueprint()` function renders Virtual DOM into a string. 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