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vatson/decorated.js

Last active November 6, 2018 15:29
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vue: decorators vs plain
Raw
decorated.js
import Vue from 'vue';
/*! *****************************************************************************
Copyright (c) Microsoft Corporation. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. You may obtain a copy of the
License at http://www.apache.org/licenses/LICENSE-2.0
THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
MERCHANTABLITY OR NON-INFRINGEMENT.
See the Apache Version 2.0 License for specific language governing permissions
and limitations under the License.
***************************************************************************** */
/* global Reflect, Promise */
var extendStatics = function(d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
function __extends(d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
}
function __decorate(decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
}
function unwrapExports (x) {
return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x.default : x;
}
function createCommonjsModule(fn, module) {
return module = { exports: {} }, fn(module, module.exports), module.exports;
}
var vueClassComponent_common = createCommonjsModule(function (module, exports) {
Object.defineProperty(exports, '__esModule', { value: true });
function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
var Vue$$1 = _interopDefault(Vue);
var reflectionIsSupported = typeof Reflect !== 'undefined' && Reflect.defineMetadata;
function copyReflectionMetadata(to, from) {
forwardMetadata(to, from);
Object.getOwnPropertyNames(from.prototype).forEach(function (key) {
forwardMetadata(to.prototype, from.prototype, key);
});
Object.getOwnPropertyNames(from).forEach(function (key) {
forwardMetadata(to, from, key);
});
}
function forwardMetadata(to, from, propertyKey) {
var metaKeys = propertyKey
? Reflect.getOwnMetadataKeys(from, propertyKey)
: Reflect.getOwnMetadataKeys(from);
metaKeys.forEach(function (metaKey) {
var metadata = propertyKey
? Reflect.getOwnMetadata(metaKey, from, propertyKey)
: Reflect.getOwnMetadata(metaKey, from);
if (propertyKey) {
Reflect.defineMetadata(metaKey, metadata, to, propertyKey);
}
else {
Reflect.defineMetadata(metaKey, metadata, to);
}
});
}
var fakeArray = { __proto__: [] };
var hasProto = fakeArray instanceof Array;
function createDecorator(factory) {
return function (target, key, index) {
var Ctor = typeof target === 'function'
? target
: target.constructor;
if (!Ctor.__decorators__) {
Ctor.__decorators__ = [];
}
if (typeof index !== 'number') {
index = undefined;
}
Ctor.__decorators__.push(function (options) { return factory(options, key, index); });
};
}
function mixins() {
var Ctors = [];
for (var _i = 0; _i < arguments.length; _i++) {
Ctors[_i] = arguments[_i];
}
return Vue$$1.extend({ mixins: Ctors });
}
function isPrimitive(value) {
var type = typeof value;
return value == null || (type !== 'object' && type !== 'function');
}
function warn(message) {
if (typeof console !== 'undefined') {
console.warn('[vue-class-component] ' + message);
}
}
function collectDataFromConstructor(vm, Component) {
// override _init to prevent to init as Vue instance
var originalInit = Component.prototype._init;
Component.prototype._init = function () {
var _this = this;
// proxy to actual vm
var keys = Object.getOwnPropertyNames(vm);
// 2.2.0 compat (props are no longer exposed as self properties)
if (vm.$options.props) {
for (var key in vm.$options.props) {
if (!vm.hasOwnProperty(key)) {
keys.push(key);
}
}
}
keys.forEach(function (key) {
if (key.charAt(0) !== '_') {
Object.defineProperty(_this, key, {
get: function () { return vm[key]; },
set: function (value) { vm[key] = value; },
configurable: true
});
}
});
};
// should be acquired class property values
var data = new Component();
// restore original _init to avoid memory leak (#209)
Component.prototype._init = originalInit;
// create plain data object
var plainData = {};
Object.keys(data).forEach(function (key) {
if (data[key] !== undefined) {
plainData[key] = data[key];
}
});
if (process.env.NODE_ENV !== 'production') {
if (!(Component.prototype instanceof Vue$$1) && Object.keys(plainData).length > 0) {
warn('Component class must inherit Vue or its descendant class ' +
'when class property is used.');
}
}
return plainData;
}
var $internalHooks = [
'data',
'beforeCreate',
'created',
'beforeMount',
'mounted',
'beforeDestroy',
'destroyed',
'beforeUpdate',
'updated',
'activated',
'deactivated',
'render',
'errorCaptured' // 2.5
];
function componentFactory(Component, options) {
if (options === void 0) { options = {}; }
options.name = options.name || Component._componentTag || Component.name;
// prototype props.
var proto = Component.prototype;
Object.getOwnPropertyNames(proto).forEach(function (key) {
if (key === 'constructor') {
return;
}
// hooks
if ($internalHooks.indexOf(key) > -1) {
options[key] = proto[key];
return;
}
var descriptor = Object.getOwnPropertyDescriptor(proto, key);
if (descriptor.value !== void 0) {
// methods
if (typeof descriptor.value === 'function') {
(options.methods || (options.methods = {}))[key] = descriptor.value;
}
else {
// typescript decorated data
(options.mixins || (options.mixins = [])).push({
data: function () {
var _a;
return _a = {}, _a[key] = descriptor.value, _a;
}
});
}
}
else if (descriptor.get || descriptor.set) {
// computed properties
(options.computed || (options.computed = {}))[key] = {
get: descriptor.get,
set: descriptor.set
};
}
});
(options.mixins || (options.mixins = [])).push({
data: function () {
return collectDataFromConstructor(this, Component);
}
});
// decorate options
var decorators = Component.__decorators__;
if (decorators) {
decorators.forEach(function (fn) { return fn(options); });
delete Component.__decorators__;
}
// find super
var superProto = Object.getPrototypeOf(Component.prototype);
var Super = superProto instanceof Vue$$1
? superProto.constructor
: Vue$$1;
var Extended = Super.extend(options);
forwardStaticMembers(Extended, Component, Super);
if (reflectionIsSupported) {
copyReflectionMetadata(Extended, Component);
}
return Extended;
}
var reservedPropertyNames = [
// Unique id
'cid',
// Super Vue constructor
'super',
// Component options that will be used by the component
'options',
'superOptions',
'extendOptions',
'sealedOptions',
// Private assets
'component',
'directive',
'filter'
];
function forwardStaticMembers(Extended, Original, Super) {
// We have to use getOwnPropertyNames since Babel registers methods as non-enumerable
Object.getOwnPropertyNames(Original).forEach(function (key) {
// `prototype` should not be overwritten
if (key === 'prototype') {
return;
}
// Some browsers does not allow reconfigure built-in properties
var extendedDescriptor = Object.getOwnPropertyDescriptor(Extended, key);
if (extendedDescriptor && !extendedDescriptor.configurable) {
return;
}
var descriptor = Object.getOwnPropertyDescriptor(Original, key);
// If the user agent does not support `__proto__` or its family (IE <= 10),
// the sub class properties may be inherited properties from the super class in TypeScript.
// We need to exclude such properties to prevent to overwrite
// the component options object which stored on the extended constructor (See #192).
// If the value is a referenced value (object or function),
// we can check equality of them and exclude it if they have the same reference.
// If it is a primitive value, it will be forwarded for safety.
if (!hasProto) {
// Only `cid` is explicitly exluded from property forwarding
// because we cannot detect whether it is a inherited property or not
// on the no `__proto__` environment even though the property is reserved.
if (key === 'cid') {
return;
}
var superDescriptor = Object.getOwnPropertyDescriptor(Super, key);
if (!isPrimitive(descriptor.value) &&
superDescriptor &&
superDescriptor.value === descriptor.value) {
return;
}
}
// Warn if the users manually declare reserved properties
if (process.env.NODE_ENV !== 'production' &&
reservedPropertyNames.indexOf(key) >= 0) {
warn("Static property name '" + key + "' declared on class '" + Original.name + "' " +
'conflicts with reserved property name of Vue internal. ' +
'It may cause unexpected behavior of the component. Consider renaming the property.');
}
Object.defineProperty(Extended, key, descriptor);
});
}
function Component(options) {
if (typeof options === 'function') {
return componentFactory(options);
}
return function (Component) {
return componentFactory(Component, options);
};
}
Component.registerHooks = function registerHooks(keys) {
$internalHooks.push.apply($internalHooks, keys);
};
exports.default = Component;
exports.createDecorator = createDecorator;
exports.mixins = mixins;
});
var Component = unwrapExports(vueClassComponent_common);
var vueClassComponent_common_1 = vueClassComponent_common.createDecorator;
var vueClassComponent_common_2 = vueClassComponent_common.mixins;
/** vue-property-decorator verson 7.2.0 MIT LICENSE copyright 2018 kaorun343 */
/**
* decorator of a prop
* @param options the options for the prop
* @return PropertyDecorator | void
*/
function Prop(options) {
if (options === void 0) { options = {}; }
return vueClassComponent_common_1(function (componentOptions, k) {
(componentOptions.props || (componentOptions.props = {}))[k] = options;
});
}
var DecoratedComponent = /** @class */ (function (_super) {
__extends(DecoratedComponent, _super);
function DecoratedComponent() {
return _super !== null && _super.apply(this, arguments) || this;
}
Object.defineProperty(DecoratedComponent.prototype, "greeting", {
get: function () {
return "Hello, " + this.name;
},
enumerable: true,
configurable: true
});
DecoratedComponent.prototype.cssStyles = function () {
return ['smth'];
};
__decorate([
Prop(String)
], DecoratedComponent.prototype, "name", void 0);
DecoratedComponent = __decorate([
Component
], DecoratedComponent);
return DecoratedComponent;
}(Vue));
export { DecoratedComponent };
Raw
decorated.ts
import Vue from 'vue';
import { Component, Prop } from 'vue-property-decorator';
@Component
export class DecoratedComponent extends Vue {
@Prop(String)
public name: string;
public get greeting(): string {
return `Hello, ${this.name}`;
}
public cssStyles(): string[] {
return ['smth'];
}
}
Raw
plain.js
import vue from 'vue';
var PlainComponent = vue.extend({
props: {
name: String,
},
computed: {
greeting: function () {
return "Hello, " + this.name;
}
},
methods: {
cssStyles: function () {
return ['smth'];
}
},
});
export { PlainComponent };
Raw
plain.ts
import vue from 'vue';
export const PlainComponent = vue.extend({
props: {
name: String,
},
computed: {
greeting(): string {
return `Hello, ${this.name}`;
}
},
methods: {
cssStyles(): string[] {
return ['smth'];
}
},
})
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