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<h1 id="redux"><a href="#redux" class="headerlink" title="redux"></a>redux</h1><p><strong>Subspace</strong> can be used with <a href="https://redux.js.org/" target="_blank" rel="noopener">redux</a>. <strong>Subspace</strong> returns <a href="https://rxjs-dev.firebaseapp.com/guide/observable" target="_blank" rel="noopener"><code>Observables</code></a>, which you can subscribe to, and if this subscription has access to the redux store, it will be able to dispatch actions when the observable emits an event.</p>
<h3 id="Example"><a href="#Example" class="headerlink" title="Example"></a>Example</h3><p>Heres a simple example on how to setup <strong>Subspace</strong> to work with <code>redux</code>:</p>
<div class="c-notification">
This example is available in <a href="https://github.com/embarklabs/subspace/tree/master/examples/redux" target="_blank">Github</a>
</div>
<h4 id="index-js"><a href="#index-js" class="headerlink" title="index.js"></a>index.js</h4>
<!-- Has Prism -->
<pre class="line-numbers" style="" ><code class="language-js">import store from &#39;.&#x2F;store&#39;;
import web3 from &#39;.&#x2F;web3&#39;;
import Subspace from &#39;@embarklabs&#x2F;subspace&#39;;
import { myAction } from &#39;.&#x2F;actions&#39;;
const run = async () =&gt; {
const MyContractInstance = ...; &#x2F;&#x2F; TODO: obtain a web3.eth.contract instance
const subspace = new Subspace(web3);
await subspace.init();
subspace.trackEvent(MyContractInstance, &quot;MyEvent&quot;, {filter: {}, fromBlock: 1 })
.subscribe(eventData =&gt; {
store.dispatch(myAction(eventData));
});
}
run();
</code></pre>
<div class="c-notification c-notification--warning">
<h3>Handling Contract Objects</h3>
The variable <code>MyContractInstance</code> is a <code>web3.eth.Contract</code> object pointing to a deployed contract address. You can use a DApp framework like <a href="https://embark.status.im/docs/contracts_javascript.html" target="_blank" rel="noopener">Embark</a> to easily import that contract instance: <code>import { MyContract } from './embarkArtifacts/contracts';</code>, or use web3.js directly (just like in the example <a href="https://github.com/embarklabs/subspace/blob/master/examples/redux/src/MyContract.js#L36-L42" target="_blank">source code</a>)
</div>
<h4 id="store-js"><a href="#store-js" class="headerlink" title="store.js"></a>store.js</h4>
<!-- Has Prism -->
<pre class="line-numbers" style="" ><code class="language-js">import { createStore } from &#39;redux&#39;;
import {myReducer} from &#39;.&#x2F;reducer&#39;;
export default store = createStore(myReducer);
</code></pre>
<h4 id="reducer-js"><a href="#reducer-js" class="headerlink" title="reducer.js"></a>reducer.js</h4>
<!-- Has Prism -->
<pre class="line-numbers" style="" ><code class="language-js">import { MY_ACTION } from &quot;.&#x2F;constants&quot;;
const initialState = {
data: {}
};
export const myReducer = (state = initialState, action) =&gt; {
switch (action.type) {
case MY_ACTION:
return { data: action.eventData };
default:
return state;
}
};
</code></pre>
<h4 id="constants-js"><a href="#constants-js" class="headerlink" title="constants.js"></a>constants.js</h4>
<!-- Has Prism -->
<pre class="line-numbers" style="" ><code class="language-js">export const MY_ACTION = &#39;MY_ACTION&#39;;
</code></pre>
<h4 id="actions-js"><a href="#actions-js" class="headerlink" title="actions.js"></a>actions.js</h4>
<!-- Has Prism -->
<pre class="line-numbers" style="" ><code class="language-js">import {MY_ACTION} from &#39;.&#x2F;constants.js&#39;;
export const myAction = eventData =&gt; ({type: MY_ACTION, eventData});
</code></pre>
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<h3>Using React and Redux</h3>
A practical example can also be found in <code>examples/react-redux</code>.
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</script>
<script>
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(require('jquery')) :
typeof define === 'function' && define.amd ? define(['jquery'], factory) :
(factory(global.jQuery));
}(this, (function ($) { 'use strict';
$ = $ && $.hasOwnProperty('default') ? $['default'] : $;
/**
* @author Mudit Ameta
* @license https://github.com/zeusdeux/isInViewport/blob/master/license.md MIT
*/
// expose isInViewport as a custom pseudo-selector
$.extend($.expr.pseudos || $.expr[':'], {
// if $.expr.createPseudo is available, use it
'in-viewport': $.expr.createPseudo
? $.expr.createPseudo(function (argsString) { return function (currElement) { return isInViewport(currElement, getSelectorArgs(argsString)); }; })
: function (currObj, index, meta) { return isInViewport(currObj, getSelectorArgs(meta[3])); }
});
// expose isInViewport as a function too
// this lets folks pass around actual objects as options (like custom viewport)
// and doesn't tie 'em down to strings. It also prevents isInViewport from
// having to look up and wrap the dom element corresponding to the viewport selector
$.fn.isInViewport = function(options) {
return this.filter(function (i, el) { return isInViewport(el, options); })
};
$.fn.run = run;
// lets you chain any arbitrary function or an array of functions and returns a jquery object
function run(args) {
var this$1 = this;
if (arguments.length === 1 && typeof args === 'function') {
args = [args];
}
if (!(args instanceof Array)) {
throw new SyntaxError('isInViewport: Argument(s) passed to .do/.run should be a function or an array of functions')
}
args.forEach(function (arg) {
if (typeof arg !== 'function') {
console.warn('isInViewport: Argument(s) passed to .do/.run should be a function or an array of functions');
console.warn('isInViewport: Ignoring non-function values in array and moving on');
} else {
[].slice.call(this$1).forEach(function (t) { return arg.call($(t)); });
}
});
return this
}
// gets the width of the scrollbar
function getScrollbarWidth(viewport) {
// append a div that has 100% width to get true width of viewport
var el = $('<div></div>').css({
width: '100%'
});
viewport.append(el);
// subtract true width from the viewport width which is inclusive
// of scrollbar by default
var scrollBarWidth = viewport.width() - el.width();
// remove our element from DOM
el.remove();
return scrollBarWidth
}
// Returns true if DOM element `element` is in viewport
function isInViewport(element, options) {
var ref = element.getBoundingClientRect();
var top = ref.top;
var bottom = ref.bottom;
var left = ref.left;
var right = ref.right;
var settings = $.extend({
tolerance: 0,
viewport: window
}, options);
var isVisibleFlag = false;
var $viewport = settings.viewport.jquery ? settings.viewport : $(settings.viewport);
if (!$viewport.length) {
console.warn('isInViewport: The viewport selector you have provided matches no element on page.');
console.warn('isInViewport: Defaulting to viewport as window');
$viewport = $(window);
}
var $viewportHeight = $viewport.height();
var $viewportWidth = $viewport.width();
var typeofViewport = $viewport[0].toString();
// if the viewport is other than window recalculate the top,
// bottom,left and right wrt the new viewport
// the [object DOMWindow] check is for window object type in PhantomJS
if ($viewport[0] !== window && typeofViewport !== '[object Window]' && typeofViewport !== '[object DOMWindow]') {
// use getBoundingClientRect() instead of $.Offset()
// since the original top/bottom positions are calculated relative to browser viewport and not document
var viewportRect = $viewport[0].getBoundingClientRect();
// recalculate these relative to viewport
top = top - viewportRect.top;
bottom = bottom - viewportRect.top;
left = left - viewportRect.left;
right = right - viewportRect.left;
// get the scrollbar width from cache or calculate it
isInViewport.scrollBarWidth = isInViewport.scrollBarWidth || getScrollbarWidth($viewport);
// remove the width of the scrollbar from the viewport width
$viewportWidth -= isInViewport.scrollBarWidth;
}
// handle falsy, non-number and non-integer tolerance value
// same as checking using isNaN and then setting to 0
// bitwise operators deserve some love too you know
settings.tolerance = ~~Math.round(parseFloat(settings.tolerance));
if (settings.tolerance < 0) {
settings.tolerance = $viewportHeight + settings.tolerance; // viewport height - tol
}
// the element is NOT in viewport iff it is completely out of
// viewport laterally or if it is completely out of the tolerance
// region. Therefore, if it is partially in view then it is considered
// to be in the viewport and hence true is returned. Because we have adjusted
// the left/right positions relative to the viewport, we should check the
// element's right against the viewport's 0 (left side), and the element's
// left against the viewport's width to see if it is outside of the viewport.
if (right <= 0 || left >= $viewportWidth) {
return isVisibleFlag
}
// if the element is bound to some tolerance
isVisibleFlag = settings.tolerance ? top <= settings.tolerance && bottom >= settings.tolerance : bottom > 0 && top <= $viewportHeight;
return isVisibleFlag
}
// get the selector args from the args string proved by Sizzle
function getSelectorArgs(argsString) {
if (argsString) {
var args = argsString.split(',');
// when user only gives viewport and no tolerance
if (args.length === 1 && isNaN(args[0])) {
args[1] = args[0];
args[0] = void 0;
}
return {
tolerance: args[0] ? args[0].trim() : void 0,
viewport: args[1] ? $(args[1].trim()) : void 0
}
}
return {}
}
})));
//# sourceMappingURL=isInViewport.js.map
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.19.0/prism.min.js"></script>
<script>
$(document).ready(function() {
$(document).on('scroll',function(e)
{
$('h2[id]').each(function()
{
if ( $(this).offset().top < window.pageYOffset + 100
&& $(this).offset().top +
$(this).height() > window.pageYOffset + 100
)
{
$(this).addClass('is-active');
var data = $(this).attr('id');
window.location.hash = '#!' + data;
var $location = window.location.hash.replace(/^#!/, '');
$('.js-docs-sidebar a').each(function() {
if($(this).attr('href').indexOf($location) > -1) {
$(this).addClass('is-active');
} else {
$(this).removeClass('is-active');
}
});
}
});
});
$(window).scroll(function() {
$('.js-inviewport-item').isInViewport({
tolerance: 0
})
.addClass('is-active');
});
var options = {
classes: {
clone: 'o-header__top--clone',
stick: 'is-sticky',
unstick: 'is-unsticky'
}
};
if($(window).width() >= 767) {
var header = new Headhesive('.js-header', options);
}
$('.js-navigation-open').on('click', function(event) {
event.preventDefault();
$('.js-navigation-list').addClass('is-active');
});
$('.js-navigation-close').on('click', function(event) {
event.preventDefault();
$('.js-navigation-list').removeClass('is-active');
});
$('.js-header-keyvisual').addClass('is-active');
// Popup
$('.js-popup').magnificPopup({
type: 'inline',
preloader: false,
focus: '#name',
// When elemened is focused, some mobile browsers in some cases zoom in
// It looks not nice, so we disable it:
callbacks: {
beforeOpen: function() {
if($(window).width() < 700) {
this.st.focus = false;
} else {
this.st.focus = '#name';
}
}
}
});
// Scroll
$('.js-anchor-scroll').anchorScroll({
scrollSpeed: 800, // scroll speed
offsetTop: 100, // offset for fixed top bars (defaults to 0)
onScroll: function () {
// callback on scroll start
},
scrollEnd: function () {
// callback on scroll end
}
});
});
$('.js-docs-trigger').on('click', function(event) {
event.preventDefault();
$('.js-docs-sidebar').addClass('is-active');
});
$('.js-docs-trigger-close').on('click', function(event) {
event.preventDefault();
$('.js-docs-sidebar').removeClass('is-active');
});
</script>
</body>
</body>
</html>