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@parity/light.js

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A high-level reactive JS library optimized for light clients

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<!DOCTYPE HTML> <html lang="" > <head> <meta charset="UTF-8"> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> <title>Introduction · GitBook</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta name="description" content=""> <meta name="generator" content="GitBook 3.2.3"> <link rel="stylesheet" href="gitbook/style.css"> <link rel="stylesheet" href="gitbook/gitbook-plugin-highlight/website.css"> <link rel="stylesheet" href="gitbook/gitbook-plugin-search/search.css"> <link rel="stylesheet" href="gitbook/gitbook-plugin-fontsettings/website.css"> <meta name="HandheldFriendly" content="true"/> <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"> <meta name="apple-mobile-web-app-capable" content="yes"> <meta name="apple-mobile-web-app-status-bar-style" content="black"> <link rel="apple-touch-icon-precomposed" sizes="152x152" href="gitbook/images/apple-touch-icon-precomposed-152.png"> <link rel="shortcut icon" href="gitbook/images/favicon.ico" type="image/x-icon"> </head> <body> <div class="book"> <div class="book-summary"> <div id="book-search-input" role="search"> <input type="text" placeholder="Type to search" /> </div> <nav role="navigation"> <ul class="summary"> <li class="chapter active" data-level="1.1" data-path="./"> <a href="./"> Introduction </a> </li> <li class="chapter " data-level="1.2" > <span> Getting started </span> <ul class="articles"> <li class="chapter " data-level="1.2.1" data-path="getting-started/installation.html"> <a href="getting-started/installation.html"> Installation </a> </li> <li class="chapter " data-level="1.2.2" data-path="getting-started/does-it-work-with-a-full-node.html"> <a href="getting-started/does-it-work-with-a-full-node.html"> Does this work with a full node? </a> </li> </ul> </li> <li class="chapter " data-level="1.3" > <span> Guides </span> <ul class="articles"> <li class="chapter " data-level="1.3.1" data-path="guides/tutorial1-set-up-a-light-client.html"> <a href="guides/tutorial1-set-up-a-light-client.html"> Tutorial Part 1: Set up a Light Client </a> </li> <li class="chapter " data-level="1.3.2" data-path="guides/tutorial2-our-first-rpcobservable.html"> <a href="guides/tutorial2-our-first-rpcobservable.html"> Tutorial Part 2: Our First RpcObservable </a> </li> <li class="chapter " data-level="1.3.3" data-path="guides/tutorial3-manipulating-rpcobservables.html"> <a href="guides/tutorial3-manipulating-rpcobservables.html"> Tutorial Part 3: Manipulating RpcObservables </a> </li> <li class="chapter " data-level="1.3.4" data-path="guides/tutorial4-send-a-transaction.html"> <a href="guides/tutorial4-send-a-transaction.html"> Tutorial Part 4: Send a Transaction </a> </li> <li class="chapter " data-level="1.3.5" data-path="guides/tutorial5-work-with-contracts.html"> <a href="guides/tutorial5-work-with-contracts.html"> Tutorial Part 5: Work with Contracts </a> </li> <li class="chapter " data-level="1.3.6" data-path="guides/tutorial6-integrate-with-react.html"> <a href="guides/tutorial6-integrate-with-react.html"> Tutorial Part 6: Integrate with React </a> </li> <li class="chapter " data-level="1.3.7" data-path="guides/redux-integration.md"> <span> Redux Integration </a> </li> <li class="chapter " data-level="1.3.8" data-path="guides/angular-integration.md"> <span> Angular Integration </a> </li> </ul> </li> <li class="chapter " data-level="1.4" > <span> Concepts </span> <ul class="articles"> <li class="chapter " data-level="1.4.1" data-path="concepts/light-client-development.html"> <a href="concepts/light-client-development.html"> Light Client Development </a> </li> <li class="chapter " data-level="1.4.2" data-path="concepts/reactive-programming.html"> <a href="concepts/reactive-programming.html"> Reactive Programming </a> </li> <li class="chapter " data-level="1.4.3" data-path="concepts/rpc-observables.html"> <a href="concepts/rpc-observables.html"> RpcObservables </a> </li> <li class="chapter " data-level="1.4.4" data-path="concepts/rpc-observables-properties.html"> <a href="concepts/rpc-observables-properties.html"> RpcObservables Properties </a> </li> </ul> </li> <li class="chapter " data-level="1.5" > <span> API </span> <ul class="articles"> <li class="chapter " data-level="1.5.1" data-path="api/modules/_api_.html"> <a href="api/modules/_api_.html"> api </a> </li> <li class="chapter " data-level="1.5.2" > <span> FrequencyObservables </span> <ul class="articles"> <li class="chapter " data-level="1.5.2.1" data-path="api/modules/_frequency_accounts_.html"> <a href="api/modules/_frequency_accounts_.html"> frequency/accounts </a> </li> <li class="chapter " data-level="1.5.2.2" data-path="api/modules/_frequency_blocks_.html"> <a href="api/modules/_frequency_blocks_.html"> frequency/blocks </a> </li> <li class="chapter " data-level="1.5.2.3" data-path="api/modules/_frequency_frequency_.html"> <a href="api/modules/_frequency_frequency_.html"> frequency/frequency </a> </li> <li class="chapter " data-level="1.5.2.4" data-path="api/modules/_frequency_health_.html"> <a href="api/modules/_frequency_health_.html"> frequency/health </a> </li> <li class="chapter " data-level="1.5.2.5" data-path="api/modules/_frequency_other_.html"> <a href="api/modules/_frequency_other_.html"> frequency/other </a> </li> <li class="chapter " data-level="1.5.2.6" data-path="api/modules/_frequency_time_.html"> <a href="api/modules/_frequency_time_.html"> frequency/time </a> </li> <li class="chapter " data-level="1.5.2.7" data-path="api/modules/_frequency_utils_createpubsubobservable_.html"> <a href="api/modules/_frequency_utils_createpubsubobservable_.html"> frequency/utils/createPubsubObservable </a> </li> </ul> </li> <li class="chapter " data-level="1.5.3" > <span> RpcObservables </span> <ul class="articles"> <li class="chapter " data-level="1.5.3.1" data-path="api/modules/_rpc_eth_.html"> <a href="api/modules/_rpc_eth_.html"> rpc/eth </a> </li> <li class="chapter " data-level="1.5.3.2" data-path="api/modules/_rpc_net_.html"> <a href="api/modules/_rpc_net_.html"> rpc/net </a> </li> <li class="chapter " data-level="1.5.3.3" data-path="api/modules/_rpc_other_makecontract_.html"> <a href="api/modules/_rpc_other_makecontract_.html"> rpc/other/makeContract </a> <ul class="articles"> <li class="chapter " data-level="1.5.3.3.1" data-path="api/interfaces/_rpc_other_makecontract_.makecontract.html"> <a href="api/interfaces/_rpc_other_makecontract_.makecontract.html"> MakeContract </a> </li> </ul> </li> <li class="chapter " data-level="1.5.3.4" data-path="api/modules/_rpc_other_post_.html"> <a href="api/modules/_rpc_other_post_.html"> rpc/other/post </a> <ul class="articles"> <li class="chapter " data-level="1.5.3.4.1" data-path="api/interfaces/_rpc_other_post_.postoptions.html"> <a href="api/interfaces/_rpc_other_post_.postoptions.html"> PostOptions </a> </li> </ul> </li> <li class="chapter " data-level="1.5.3.5" data-path="api/modules/_rpc_parity_.html"> <a href="api/modules/_rpc_parity_.html"> rpc/parity </a> </li> <li class="chapter " data-level="1.5.3.6" data-path="api/modules/_rpc_rpc_.html"> <a href="api/modules/_rpc_rpc_.html"> rpc/rpc </a> </li> <li class="chapter " data-level="1.5.3.7" data-path="api/modules/_rpc_utils_createrpc_.html"> <a href="api/modules/_rpc_utils_createrpc_.html"> rpc/utils/createRpc </a> </li> </ul> </li> <li class="chapter " data-level="1.5.4" data-path="api/modules/_types_.html"> <a href="api/modules/_types_.html"> Types </a> <ul class="articles"> <li class="chapter " data-level="1.5.4.1" data-path="api/interfaces/_types_.frequencyobservable.html"> <a href="api/interfaces/_types_.frequencyobservable.html"> FrequencyObservable </a> </li> <li class="chapter " data-level="1.5.4.2" data-path="api/interfaces/_types_.frequencyobservableoptions.html"> <a href="api/interfaces/_types_.frequencyobservableoptions.html"> FrequencyObservableOptions </a> </li> <li class="chapter " data-level="1.5.4.3" data-path="api/interfaces/_types_.makecontract.html"> <a href="api/interfaces/_types_.makecontract.html"> MakeContract </a> </li> <li class="chapter " data-level="1.5.4.4" data-path="api/interfaces/_types_.metadata.html"> <a href="api/interfaces/_types_.metadata.html"> Metadata </a> </li> <li class="chapter " data-level="1.5.4.5" data-path="api/interfaces/_types_.rpcobservable.html"> <a href="api/interfaces/_types_.rpcobservable.html"> RpcObservable </a> </li> <li class="chapter " data-level="1.5.4.6" data-path="api/interfaces/_types_.rpcobservableoptions.html"> <a href="api/interfaces/_types_.rpcobservableoptions.html"> RpcObservableOptions </a> </li> <li class="chapter " data-level="1.5.4.7" data-path="api/interfaces/_types_.txstatus.html"> <a href="api/interfaces/_types_.txstatus.html"> TxStatus </a> </li> </ul> </li> <li class="chapter " data-level="1.5.5" > <span> Utils </span> <ul class="articles"> <li class="chapter " data-level="1.5.5.1" data-path="api/modules/_utils_isloading_.md"> <span> utils/isLoading </a> </li> <li class="chapter " data-level="1.5.5.2" data-path="api/modules/_utils_isobservable_.html"> <a href="api/modules/_utils_isobservable_.html"> utils/isObservable </a> </li> <li class="chapter " data-level="1.5.5.3" data-path="api/modules/_utils_operators_distinctreplayrefcount_.md"> <span> utils/operators/distinctReplayRefCount </a> </li> <li class="chapter " data-level="1.5.5.4" data-path="api/modules/_utils_operators_distinctvalues_.html"> <a href="api/modules/_utils_operators_distinctvalues_.html"> utils/operators/distinctValues </a> </li> <li class="chapter " data-level="1.5.5.5" data-path="api/modules/_utils_operators_switchmappromise_.html"> <a href="api/modules/_utils_operators_switchmappromise_.html"> utils/operators/switchMapPromise </a> </li> <li class="chapter " data-level="1.5.5.6" data-path="api/modules/_utils_testhelpers_mockapi_.html"> <a href="api/modules/_utils_testhelpers_mockapi_.html"> utils/testHelpers/mockApi </a> </li> <li class="chapter " data-level="1.5.5.7" data-path="api/modules/_utils_testhelpers_mockrpc_.html"> <a href="api/modules/_utils_testhelpers_mockrpc_.html"> utils/testHelpers/mockRpc </a> </li> </ul> </li> </ul> </li> <li class="divider"></li> <li> <a href="https://www.gitbook.com" target="blank" class="gitbook-link"> Published with GitBook </a> </li> </ul> </nav> </div> <div class="book-body"> <div class="body-inner"> <div class="book-header" role="navigation"> <!-- Title --> <h1> <i class="fa fa-circle-o-notch fa-spin"></i> <a href="." >Introduction</a> </h1> </div> <div class="page-wrapper" tabindex="-1" role="main"> <div class="page-inner"> <div id="book-search-results"> <div class="search-noresults"> <section class="normal markdown-section"> <h1 id="paritylightjs">@parity/light.js</h1> <p>A high-level reactive JS library optimized for light clients.</p> <p><a href="https://travis-ci.org/paritytech/js-libs" target="_blank"><img src="https://travis-ci.org/paritytech/js-libs.svg?branch=master" alt="Build Status"></a> <a href="https://www.npmjs.com/package/@parity/light.js" target="_blank"><img src="https://img.shields.io/npm/v/@parity/light.js.svg" alt="npm (scoped)"></a> <a href="https://www.npmjs.com/package/@parity/light.js" target="_blank"><img src="https://img.shields.io/npm/dw/@parity/light.js.svg" alt="npm"></a> <a href="https://david-dm.org/paritytech/js-libs?path=packages/light.js" target="_blank"><img src="https://david-dm.org/paritytech/js-libs/status.svg?path=packages/light.js" alt="dependencies Status"></a> <a href="https://parity-js.github.io/light.js/" target="_blank"><img src="https://img.shields.io/badge/docs-passing-green.svg" alt="docs"></a></p> <p>Github: <a href="https://github.com/paritytech/js-libs/tree/master/packages/light.js" target="_blank">https://github.com/paritytech/js-libs/tree/master/packages/light.js</a></p> </section> </div> <div class="search-results"> <div 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