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<!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 t.forEach(function(t,i){l.set(i,e(t,n,r))}),l}var f=dt(r,t,{},n);return t.forEach(function(t,i){f[i]=e(t,n,r)}),f}var h=dt(r,t,{},n);for(var p in t)h[p]=e(t[p],n,r);return h}(e,t,n)},n.trace=vt,n.getDependencyTree=tt,n.getObserverTree=function(e,t){return rt(Wt(e,t))},n._resetGlobalState=function(){var e=new me;for(var t in e)-1===ge.indexOf(t)&&(Se[t]=e[t]);Se.allowStateChanges=!Se.enforceActions},n._getGlobalState=function(){return Se},n.getDebugName=Xt,n.getAtom=Wt,n._getAdministration=Jt,n._allowStateChanges=function(e,t){var n,r=ee(e);try{n=t()}finally{te(r)}return n},n._allowStateChangesInsideComputed=function(e){var t,n=Se.computationDepth;Se.computationDepth=0;try{t=e()}finally{Se.computationDepth=n}return t},n.isArrayLike=function(e){return Array.isArray(e)||It(e)},n.$mobx=A,n._isComputingDerivation=function(){return null!==Se.trackingDerivation},n.onReactionError=function(e){return Se.globalReactionErrorHandlers.push(e),function(){var 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 clearTimeout?clearTimeout:s}catch(e){i=s}}();var c,l=[],f=!1,h=-1;function p(){f&&c&&(f=!1,c.length?l=c.concat(l):h=-1,l.length&&d())}function d(){if(!f){var e=u(p);f=!0;for(var t=l.length;t;){for(c=l,l=[];++h<t;)c&&c[h].run();h=-1,t=l.length}c=null,f=!1,function(e){if(i===clearTimeout)return clearTimeout(e);if((i===s||!i)&&clearTimeout)return i=clearTimeout,clearTimeout(e);try{i(e)}catch(t){try{return i.call(null,e)}catch(t){return i.call(this,e)}}}(e)}}function v(e,t){this.fun=e,this.array=t}function y(){}o.nextTick=function(e){var t=new Array(arguments.length-1);if(arguments.length>1)for(var n=1;n<arguments.length;n++)t[n-1]=arguments[n];l.push(new v(e,t)),1!==l.length||f||u(d)},v.prototype.run=function(){this.fun.apply(null,this.array)},o.title="browser",o.browser=!0,o.env={},o.argv=[],o.version="",o.versions={},o.on=y,o.addListener=y,o.once=y,o.off=y,o.removeListener=y,o.removeAllListeners=y,o.emit=y,o.prependListener=y,o.prependOnceListener=y,o.listeners=function(e){return[]},o.binding=function(e){throw new Error("process.binding is not supported")},o.cwd=function(){return"/"},o.chdir=function(e){throw new Error("process.chdir is not supported")},o.umask=function(){return 0}},{}]},{},[1])(1)});
// 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>
@jlgrall

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commented Feb 8, 2019

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