2.06 - when to use the interface class.js

JS设计模式源代码

var DynamicMap = new Interface('DynamicMap', ['centerOnPoint', 'zoom', 'draw']);

function displayRoute(mapInstance) {
    Interface.ensureImplements(mapInstace, DynamicMap);
    mapInstance.centerOnPoint(12, 34);
    mapInstance.zoom(5);
    mapInstance.draw();
    ...
}