function noop() {} function assign(target) { var k, source, i = 1, len = arguments.length; for (; i < len; i++) { source = arguments[i]; for (k in source) target[k] = source[k]; } return target; } function appendNode(node, target) { target.appendChild(node); } function insertNode(node, target, anchor) { target.insertBefore(node, anchor); } function detachNode(node) { node.parentNode.removeChild(node); } function createElement(name) { return document.createElement(name); } function createText(data) { return document.createTextNode(data); } function createComment() { return document.createComment(''); } function differs(a, b) { return a !== b || ((a && typeof a === 'object') || typeof a === 'function'); } function dispatchObservers(component, group, newState, oldState) { for (var key in group) { if (!(key in newState)) continue; var newValue = newState[key]; var oldValue = oldState[key]; if (differs(newValue, oldValue)) { var callbacks = group[key]; if (!callbacks) continue; for (var i = 0; i < callbacks.length; i += 1) { var callback = callbacks[i]; if (callback.__calling) continue; callback.__calling = true; callback.call(component, newValue, oldValue); callback.__calling = false; } } } } function get(key) { return key ? this._state[key] : this._state; } function fire(eventName, data) { var handlers = eventName in this._handlers && this._handlers[eventName].slice(); if (!handlers) return; for (var i = 0; i < handlers.length; i += 1) { handlers[i].call(this, data); } } function observe(key, callback, options) { var group = options && options.defer ? this._observers.post : this._observers.pre; (group[key] || (group[key] = [])).push(callback); if (!options || options.init !== false) { callback.__calling = true; callback.call(this, this._state[key]); callback.__calling = false; } return { cancel: function() { var index = group[key].indexOf(callback); if (~index) group[key].splice(index, 1); } }; } function on(eventName, handler) { if (eventName === 'teardown') return this.on('destroy', handler); var handlers = this._handlers[eventName] || (this._handlers[eventName] = []); handlers.push(handler); return { cancel: function() { var index = handlers.indexOf(handler); if (~index) handlers.splice(index, 1); } }; } function set(newState) { this._set(assign({}, newState)); if (this._root._lock) return; this._root._lock = true; callAll(this._root._beforecreate); callAll(this._root._oncreate); callAll(this._root._aftercreate); this._root._lock = false; } function callAll(fns) { while (fns && fns.length) fns.pop()(); } var proto = { get: get, fire: fire, observe: observe, on: on, set: set }; function create_main_fragment ( state, component ) { var if_block_anchor; var if_block = (state.foo) && create_if_block( state, component ); return { create: function () { if ( if_block ) if_block.create(); if_block_anchor = createComment(); }, mount: function ( target, anchor ) { if ( if_block ) if_block.mount( target, anchor ); insertNode( if_block_anchor, target, anchor ); }, update: function ( changed, state ) { if ( state.foo ) { if ( !if_block ) { if_block = create_if_block( state, component ); if_block.create(); if_block.mount( if_block_anchor.parentNode, if_block_anchor ); } } else if ( if_block ) { if_block.unmount(); if_block.destroy(); if_block = null; } }, unmount: function () { if ( if_block ) if_block.unmount(); detachNode( if_block_anchor ); }, destroy: function () { if ( if_block ) if_block.destroy(); } }; } function create_if_block ( state, component ) { var p, text; return { create: function () { p = createElement( 'p' ); text = createText( "foo!" ); }, mount: function ( target, anchor ) { insertNode( p, target, anchor ); appendNode( text, p ); }, unmount: function () { detachNode( p ); }, destroy: noop }; } function SvelteComponent ( options ) { options = options || {}; this._state = options.data || {}; this._observers = { pre: Object.create( null ), post: Object.create( null ) }; this._handlers = Object.create( null ); this._root = options._root || this; this._yield = options._yield; this._destroyed = false; this._fragment = create_main_fragment( this._state, this ); if ( options.target ) { this._fragment.create(); this._fragment.mount( options.target, null ); } } assign( SvelteComponent.prototype, proto ); SvelteComponent.prototype._set = function _set ( newState ) { var oldState = this._state; this._state = assign( {}, oldState, newState ); dispatchObservers( this, this._observers.pre, newState, oldState ); this._fragment.update( newState, this._state ); dispatchObservers( this, this._observers.post, newState, oldState ); }; SvelteComponent.prototype.teardown = SvelteComponent.prototype.destroy = function destroy ( detach ) { if ( this._destroyed ) return; this.fire( 'destroy' ); if ( detach !== false ) this._fragment.unmount(); this._fragment.destroy(); this._fragment = null; this._state = {}; this._destroyed = true; }; export default SvelteComponent;