Small, fast, elegant, powerful, and cross platform JavaScript OOP library. Support main, singleton, super call, private, mixins, plugins, AOP and more.
npm install @ohze/jsface
* Small footprint, no dependency, 0.7K minimized+gzip!
* Super fast! See benchmark.
* Work on both server and client side.
* Support CommonJS.
* Support getter/setter, constant, main, singleton, mixin, private properties, Aspect Oriented Programming.
* Plugins mechanism to extend itself.
JSFace supports both server side (CommonJS) and client side JavaScript (browser).
#### bower
`` sh`
bower install jsface
` html`
#### dnsjs
` javascript`
#### Manually
` html`
First install JSFace via npm:
` sh`
npm install jsface
Then use its APIs, for example:
` javascript`
var jsface = require("jsface"),
Class = jsface.Class,
extend = jsface.extend;
` javascript
var Person = Class({
constructor: function(name, age) {
this.name = name;
this.age = age;
},
// Getter/Setter
address: {
get: function() {
return this._address;
},
set: function(value) {
this._address = value;
}
},
toString: function() {
return this.name + "/" + this.age;
}
});
var person = new Person("Rika", 20);
person.toString(); // "Rika/20"
`
` javascript
var Student = Class(Person, {
constructor: function(id, name, age) {
this.id = id;
Student.$super.call(this, name, age); // Call parent's constructor
},
toString: function() {
return this.id + "/" + Student.$superp.toString.call(this); // Call parent's toString method
}
});
var student = new Student(1, "Rika", 20);
student.toString(); // "1/Rika/20"
`
JSFace supports a special method named main(). main() is executed right after the class is created.
` javascript
Class({
constructor: function(name) {
this.name = name;
},
getName: function() {
return this.name;
},
main: function(Person) { // Class is passed to main() as its first argument
var p = new Person("Rika");
p.getName(); // "Rika"
}
});
`
` javascript
var Util = Class({
$singleton: true,
echo: function(obj) {
return obj;
}
});
Util.echo(2012); // 2012
`
` javascript
var Person = Class({
$statics: {
MIN_AGE: 1,
MAX_AGE: 150,
isValidAge: function(age) {
return age >= this.MIN_AGE && age <= this.MAX_AGE;
}
},
constructor: function(name, age) {
this.name = name;
this.age = age;
}
});
Person.MIN_AGE === 1; // true
Person.MAX_AGE === 150; // true
Person.isValidAge(0); // false
`
Constants work the same as static properties. The only different is they are immutable.
` javascript
var Person = Class({
$const: {
MIN_AGE: 1,
MAX_AGE: 150
},
constructor: function(name, age) {
this.name = name;
this.age = age;
}
});
Person.MIN_AGE = -1;
Person.MIN_AGE === 1; // true, MIN_AGE is immutable
`
JSFace supports private static properties, meaning the properties are shared over instances.
` javascript
var Person = Class(function() {
var MIN_AGE = 1, // private variables
MAX_AGE = 150;
function isValidAge(age) { // private method
return age >= MIN_AGE && age <= MAX_AGE;
}
return {
constructor: function(name, age) {
if ( !isValidAge(age)) {
throw "Invalid parameter";
}
this.name = name;
this.age = age;
}
};
});
`
JSFace provides a powerful mechanism to support mixins. Reusable code can be mixed into almost anything.
Mixin can be bound when you define classes:
` javascript
var Options = Class({
setOptions: function(opts) {
this.opts = opts;
}
});
var Events = Class({
bind: function(event, fn) {
return true;
},
unbind: function(event, fn) {
return false;
}
});
var Person = Class({
constructor: function(name, age) {
this.name = name;
this.age = age;
}
});
// Student inherits Person and extends properties from Options and Events
var Student = Class([ Person, Options, Events ], {
constructor: function(id, name, age) {}
});
var student = new Student(1, "Rika", 20);
student.setOptions({ foo: true }); // student.opts === { foo: true }
student.bind(); // true
student.unbind(); // false
`
Or after defining classes:
` javascript
var Student = Class(Person, {
constructor: function(id, name, age) {
});
extend(Student, [ Options, Events ]);
`
Mixin with instance:
` javascript
var person = new Person("Rika", 20);
extend(person, Options);
person.setOptions({ foo: true });
`
Mixin with native classes:
` javascript
extend(String.prototype, {
trim: function() {
return this.replace(/^\s+|\s+$/g, "");
}
});
" Hello World ".trim(); // "Hello World"
`$3
In browser environment, you might be using another library which also introduces the global namespace Class. JSFace can return the original Class back to the library claims it with a call to jsface.noConflict().
` javascript
jsface.noConflict();
// Code that uses other library's Class can follow here
// ...
// Define classes by using jsface.Class directly
var Person = jsface.Class({
});
`
JSFace supports Aspect Oriented Programming (AOP) via simple before/after mechanism. You can apply pointcuts over class constructors, class methods, singleton methods, instance methods. You can even apply pointcuts over native classes.
AOP support is implemented as a standalone plugin.
#### Setup
Browser:
` html`
then in your code, make an alias to jsface.pointcut:
` javascript`
var pointcut = jsface.pointcut;
NodeJS:
` javascript`
var pointcut = require("jsface.pointcut");
#### Applying pointcuts
In JSFace, an advisor is a set of pointcuts you want to apply to a subject. You can apply as many advisors as you want.
` javascript
Person = Class({
constructor: function(name) {
this.name = name;
this.counter = 0;
},
foo: function(n) {
},
bar: function(n) {
}
});
var advisor = {
constructor: {
before: function() {
this.age = 20;
},
after: function() {
this.email = "rika@sample.com";
}
},
foo: function(n) { // sugar syntax, foo:before
this.counter++;
},
bar: {
before: function(n) {
this.counter++;
},
after: function(n) {
this.counter++;
}
}
};
Person = pointcut(Person, advisor);
var person = new Person("Rika");
person.foo();
person.bar();
person.name === "Rika"; // true
person.age === 20; // true
person.email === "rika@sample.com"; // true
person.counter === 3; // true
`
#### Removing pointcuts
Using previous apply pointcut example:
` javascript
// remove all pointcuts bound to constructor and foo
Person = poincut(Person, "remove constructor foo");
// remove advisor, other advisors remained
Person = poincut(Person, "remove", advisor);
// remove all advisors, restore the fresh version of Person
Person = poincut(Person, "remove");
`
$ready plugin is designed to help a parent class to intercept their subclasses' creation.
#### Sample
` javascript
var Service = Class({
$ready: function(clazz, parent, api) {
var type = (this !== clazz) && api.type; // (this !== clazz) means this comes from a sub-class
switch (type) {
case "session":
// do something with subclass clazz when its type is session
break;
case "application":
// do something with subclass clazz when its type is application
break;
}
}
});
var SessionService = Class(Service, {
type: "session"
});
var ApplicationService = Class(Service, {
type: "application"
});
``
Have a bug? Please create an issue here on GitHub!
Copyright (c) Tan Nhu
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