Just a little module for plugins.
JavaScript
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README.md

Tapable

var Tapable = require("tapable");

Tapable is a class for plugin binding and applying.

Just extend it.

function MyClass() {
    Tapable.call(this);
}

MyClass.prototype = Object.create(Tapable.prototype);

MyClass.prototype.method = function() {};

Or mix it in.

function MyClass2() {
    EventEmitter.call(this);
    Tapable.call(this);
}

MyClass2.prototype = Object.create(EventEmitter.prototype);
Tapable.mixin(MyClass2.prototype);

MyClass2.prototype.method = function() {};

Public functions

apply

void apply(plugins: Plugin...)

Attaches all plugins passed as arguments to the instance, by calling apply on them.

plugin

void plugin(names: string|string[], handler: Function)

names are the names (or a single name) of the plugin interfaces the class provides.

handler is a callback function. The signature depends on the class. this is the instance of the class.

Protected functions

applyPlugins

void applyPlugins(name: string, args: any...)

Synchronous applies all registered handers for name. The handler functions are called with all args.

applyPluginsWaterfall

any applyPluginsWaterfall(name: string, init: any, args: any...)

Synchronous applies all registered handers for name. The handler functions are called with the return value of the previous handler and all args. For the first handler init is used and the return value of the last handler is return by applyPluginsWaterfall

applyPluginsAsync

void applyPluginsAsync(
    name: string,
    args: any...,
    callback: (err?: Error) -> void
)

Asynchronously applies all registered handers for name. The handler functions are called with all args and a callback function with the signature (err?: Error) -> void. The hander functions are called in order of registration.

callback is called after all handlers are called.

applyPluginsBailResult

any applyPluginsBailResult(name: string, args: any...)

Synchronous applies all registered handers for name. The handler function are called with all args. If a handler function returns something !== undefined, the value is returned and no more handers are applied.

applyPluginsAsyncWaterfall

applyPluginsAsyncWaterfall(
    name: string,
    init: any,
    callback: (err: Error, result: any) -> void
)

Asynchronously applies all registered handers for name. The hander functions are called with the current value and a callback function with the signature (err: Error, nextValue: any) -> void. When called nextValue is the current value for the next handler. The current value for the first handler is init. After all handlers are applied, callback is called with the last value. If any handler passes a value for err, the callback is called with this error and no more handlers are called.

applyPluginsAsyncSeries

applyPluginsAsyncSeries(
    name: string,
    args: any...,
    callback: (err: Error, result: any) -> void
)

Asynchronously applies all registered handers for name. The hander functions are called with all args and a callback function with the signature (err: Error) -> void. The handers are called in series, one at a time. After all handlers are applied, callback is called. If any handler passes a value for err, the callback is called with this error and no more handlers are called.

applyPluginsParallel

applyPluginsParallel(
    name: string,
    args: any...,
    callback: (err?: Error) -> void
)

Applies all registered handlers for name parallel. The handler functions are called with all args and a callback function with the signature (err?: Error) -> void. The callback function is called when all handlers called the callback without err. If any handler calls the callback with err, callback is invoked with this error and the other handlers are ignored.

applyPluginsParallelBailResult

applyPluginsParallelBailResult(
    name: string,
    args: any...,
    callback: (err: Error, result: any) -> void
)

Applies all registered handlers for name parallel. The handler functions are called with all args and a callback function with the signature (err?: Error) -> void. Handler functions must call the callback. They can either pass an error, or pass undefined, or pass an value. The first result (either error or value) with is not undefined is passed to the callback. The order is defined by registeration not by speed of the handler function. This function compentate this.