jlgrall/domvm-mobx-demo.html

## domvm-mobx-demo.html
<!doctype html>
<html lang="en">
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1" />
	<title>domvm-MobX Demo</title>
	<style>
.section { margin-left: 1em; }
input[type=text] { width: 10em; }
#limit { width: 3em; }
#listWrapper { margin-top: 1em; }
	</style>
</head>
<body>
<script id="dependencies">

// https://github.com/domvm/domvm (v3.4.8, dev build)
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Error("FLOW_CANCELLED"))}catch(e){n(e)}}),s}},n.toJS=function(e,t){var n;return"boolean"==typeof t&&(t={detectCycles:t}),t||(t=pt),t.detectCycles=void 0===t.detectCycles?!0===t.recurseEverything:!0===t.detectCycles,t.detectCycles&&(n=new Map),function e(t,n,r){if(!n.recurseEverything&&!ct(t))return t;if("object"!=typeof t)return t;if(null===t)return null;if(t instanceof Date)return t;if(oe(t))return e(t.get(),n,r);if(ct(t)&&lt(t),!0===n.detectCycles&&null!==t&&r.has(t))return r.get(t);if(It(t)||Array.isArray(t)){var i=dt(r,t,[],n),o=t.map(function(t){return e(t,n,r)});i.length=o.length;for(var a=0,s=o.length;a<s;a++)i[a]=o[a];return i}if(Bt(t)||Object.getPrototypeOf(t)===Set.prototype){if(!1===n.exportMapsAsObjects){var u=dt(r,t,new Set,n);return t.forEach(function(t){u.add(e(t,n,r))}),u}var c=dt(r,t,[],n);return t.forEach(function(t){c.push(e(t,n,r))}),c}if(kt(t)||Object.getPrototypeOf(t)===Map.prototype){if(!1===n.exportMapsAsObjects){var l=dt(r,t,new Map,n);return 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t=Se.globalReactionErrorHandlers.indexOf(e);t>=0&&Se.globalReactionErrorHandlers.splice(t,1)}},n._interceptReads=function(e,t,n){var r;if(kt(e)||It(e)||oe(e))r=Jt(e);else{if(!qt(e))return f(!1);if("string"!=typeof t)return f(!1);r=Jt(e,t)}return void 0!==r.dehancer?f(!1):(r.dehancer="function"==typeof t?t:n,function(){r.dehancer=void 0})}}).call(this,e("_process"),"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{_process:2}],2:[function(e,t,n){var r,i,o=t.exports={};function a(){throw new Error("setTimeout has not been defined")}function s(){throw new Error("clearTimeout has not been defined")}function u(e){if(r===setTimeout)return setTimeout(e,0);if((r===a||!r)&&setTimeout)return r=setTimeout,setTimeout(e,0);try{return r(e,0)}catch(t){try{return r.call(null,e,0)}catch(t){return r.call(this,e,0)}}}!function(){try{r="function"==typeof setTimeout?setTimeout:a}catch(e){r=a}try{i="function"==typeof 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// domvm-MobX:
!function(n,e,r){"use strict";function t(){}function o(n){return n!=r&&n.constructor===Object}function i(n){return"function"==typeof n}function a(n,e){var o=n.hooks||(n.hooks={});n.mobxObserver={name:e,reaction:r,stale:!0,eq:n.diff&&n.diff.eq,render:n.render,willUnmount:o.willUnmount},o.becameStale==r&&(o.becameStale=s);var i=n.diff?n.diff.val:t;n.config({diff:{val:i,eq:f}}),n.render=l,o.willUnmount=m}function c(n){var r=n.mobxObserver;if(r.reaction)throw Error("Reaction already set.");r.stale=!0,r.reaction=new e.Reaction(r.name,function(){r.stale=!0,n.hooks.becameStale&&n.hooks.becameStale(n,n.data)})}function u(n){var e=n.mobxObserver;if(!e.reaction)throw Error("Reaction already unset.");e.reaction.dispose(),e.reaction=r}function s(n){n.redraw()}function f(n){var e=n.mobxObserver;return e.stale?!1:e.eq?e.eq.apply(this,arguments):!0}function l(n){var r,t=n.mobxObserver,o=this,i=arguments;return t.reaction||c(n),t.reaction.track(function(){e._allowStateChanges(!1,function(){r=t.render.apply(o,i)})}),t.stale=!1,r}function m(n){u(n);var e=n.mobxObserver.willUnmount;e&&e.apply(this,arguments)}function b(n,e){n.init=function(n){return function(r){a(r,e),n&&n.apply(this,arguments)}}(n.init)}function v(n,e){n.init&&n.init.mobxObserver||(b(n,e),n.init.mobxObserver=!0)}function d(n){var e=n.displayName||n.name||n.constructor&&(n.constructor.displayName||n.constructor.name)||"<View>";return e+=".render()",o(n)?b(n,e):n=function(n){return function(r){var t=n.apply(this,arguments);return i(t)?b(r,e):v(t,e),t}}(n),n}n.config({didRedraws:function(n){var e=[];n.forEach(function(n){if(n.mobxObserver&&n.mobxObserver.stale&&null!=n.node){for(var r=0,t=n;t=t.parent();)r++;e[r]||(e[r]=[]),e[r].push(n)}});for(var r=0;r<e.length;r++)e[r]&&e[r].forEach(function(n){n.mobxObserver.stale&&null!=n.node&&n.redraw(!0)})}}),n.mobxObserver=d}(window.domvm,window.mobx);

</script>
<script id="demo">
/* jshint esversion: 6 */
/* globals domvm, mobx */

var observable = mobx.observable,
    action = mobx.action,
    el = domvm.defineElement,
    vw = domvm.defineView,
    observer = domvm.mobxObserver;  // The domvm-MobX observer() function.

var usersState = observable({
    users: [
        {name: "Dave", car: "BMW"},
        {name: "Johnny", car: false},
        {name: "Sarah", car: "Toyota"},
        {name: "Peter", car: "Volkswagen"},
        {name: "Me", car: "???"},
    ],
    // A MobX computed value (automatically caches and recomputes its result):
    get usersWithCar() {
        return this.users.filter(user => user.car !== false);
    },

    // Actions:
    setName: function(i, name) {
        console.log("Set name of user", i, "to:", name);
        this.users[i].name = name;
    },
    setCar: function(i, car) {
        console.log("Set car of user", i, "to:", car);
        this.users[i].car = car;
    },
}, {// Using @action.bound decorator to bind the value of "this":
	setName: action.bound,
	setCar: action.bound,
});

var appState = observable({
    // Set to true to display only users with a car:
    hideNoCar: false,

    // Action:
    toggleHideNoCar: function() {
        console.log("Set hide users without car:", this.hideNoCar);
        this.hideNoCar = !this.hideNoCar;
    },
}, {// Using @action.bound decorator to bind the value of "this":
	toggleHideNoCar: action.bound,
});


var AppView = observer({
    init: function(vm) {
        // To limit the number of displayed users in the user interface.
        // We create a new boxed observable so that render() can react to its changes.
        // The boxed observable is initialized with the value -1:
        vm.limitResults = observable.box(-1);
    },
    toggleLimit: action(function(e, node, vm) {
    	var limit = node.el.value;
        console.log("Toggle list limit to:", limit >= 0 ? limit : "no limit");
        vm.limitResults.set(limit);
    }),
    lastUserChange: function(prop, e, node, vm) {
    	var val = node.el.value;
    	if (prop === "name") usersState.setName(4, val);
    	else if (prop === "car") usersState.setCar(4, val === "" ? false : val);
    },
    render: function(vm) {
        console.log("Render: AppView");
        var users = usersState.users,
        	lastUserName = users[users.length - 1].name,
        	lastUserCar = users[users.length - 1].car;
        return el("div", [
            "Actions: ",
            el("div.section", [
                "Set first user: name: ",
                el("button", {onclick: [usersState.setName, 0, "Dave"]}, "Dave"),
                el("button", {onclick: [usersState.setName, 0, "Jessica"]}, "Jessica"),
                ", car: ",
                el("button", {onclick: [usersState.setCar, 0, "BMW"]}, "BMW"),
                el("button", {onclick: [usersState.setCar, 0, "Ferrari"]}, "Ferrari"),
                el("button", {onclick: [usersState.setCar, 0, false]}, "No car"),
            ]),
            el("div.section", [
                "Set last user: ",
				el("label[for=lastUserName]", "name: "),
	            el("input[type=text][id=lastUserName]", {
	            	value: lastUserName,
	            	onchange: [AppView.lastUserChange, "name"],
	            	onkeyup: [AppView.lastUserChange, "name"]
	            }),
	            ", ",
	            el("label[for=lastUserCar]", "car: "),
	            el("input[type=text][id=lastUserCar]", {
	            	value: lastUserCar === false ? "" : lastUserCar,
	            	onchange: [AppView.lastUserChange, "car"],
	            	onkeyup: [AppView.lastUserChange, "car"]
	            }),
            ]),
            "Display options:",
            el("div.section", [
            	el("label[for=hideNoCar]", "Hide users without car: "),
                el("input[type=checkbox][id=hideNoCar]", {
                	checked: appState.hideNoCar,
                	onchange: [appState.toggleHideNoCar]
                }),
            ]),
            el("div.section", [
				el("label[for=limit]", "Limit displayed users: "),
	            el("input[type=number][id=limit][min=-1]", {
	            	value: vm.limitResults.get(),
	            	onchange: [AppView.toggleLimit]
	            }),
            ]),
            el("div#listWrapper", [
            	"List of users with their cars:",
				vw(UsersListView, {
					state: usersState,  // Don't dereference usersState.users here.
					limitResults: vm.limitResults,  // Don't unbox the value here.
				}),
			]),
        ]);
    }
});

var UsersListView = observer(function UsersListView() {
    return function(vm, data) {  // The render() function
        console.log("Render: UsersListView");
            var state = data.state,
                users = appState.hideNoCar ? state.usersWithCar : state.users,
                limitResults = data.limitResults.get();
            if (limitResults >= 0) users = users.filter((user, i) => i < limitResults);
            var displayed = users.length,
            	total = state.users.length;
            // Because this list is dynamic, we MUST key the views.
            // Here we use the user name which is unique:
            return el("", [
            	el("ul", users.map((user) => vw(UserView, user, user.name))),
            	el("div.section", "(Users displayed: " + displayed + "/" + total + ")")
            ]);
    };
});

var UserView = observer(function UserView(vm) {
    return {
        render: function(vm, user) {
            console.log("Render: UserView");
            var car = user.car !== false ? "a " + user.car : "no";
            return el("li", "Name: " + user.name + ". Has " + car + " car.");
        }
    };
});


var raf = requestAnimationFrame;

console.log("Action: Mounting AppView...");
var app = domvm.createView(AppView, usersState).mount(document.body);
raf(() => console.log('> First render done. Rendered the "AppView", the "UsersListView" and 5 "UserView".'));

step = 0;
interval = setInterval(() => {
	switch(step) {
	case 1:
		console.log("=> Action 1: Changing car of first user to Ferrari...");
		usersState.users[0].car = "Ferrari";
		raf(() => console.log('> Only 1 "UserView" has been re-rendered.'));
		break;
	case 2:
		console.log("=> Action 2: Changing car of last user to none...");
		usersState.users[4].car = false;
		raf(() => console.log('> Only the "AppView" and 1 "UserView" have been re-rendered.'));
		break;
	case 3:
		console.log("=> Action 3: Changing name of first user to Jessica...");
		usersState.users[0].name = "Jessica";
		raf(() => console.log('> Only the "UsersListView" and 1 "UserView" has been re-rendered.'));
		break;
	case 4:
		console.log("=> Action 4: Limiting the number of displayed users to 3...");
		app.limitResults.set(3);
		raf(() => console.log('> Only the "AppView" and the "UsersListView" have been re-rendered.'));
		break;
	case 5:
		console.log("=> Action 5: Removing limit on number of displayed users...");
		app.limitResults.set(-1);
		raf(() => console.log('> Only the "AppView", the "UsersListView" and 2 "UserView" have been re-rendered.'));
		break;
	case 6:
		console.log("=> Action 6: Hide users without car...");
		appState.hideNoCar = true;
		raf(() => console.log('> Only the "AppView" and the "UsersListView" have been re-rendered.'));

		clearInterval(interval);
		raf(() => console.log('=> END'));
		break;
	}
	step++;
}, 800);
</script>
</body>
</html>