题解 | #观察者模式#
观察者模式
https://www.nowcoder.com/practice/557ec9ca35d542feaa06261385711323
{"html":"<!DOCTYPE html>\n<html>\n <head>\n <meta charset=utf-8>\n </head>\n <body>\n \t\n <script type=\"text/javascript\">\n // 补全代码\n class Observerd { // 被观察者\n constructor(name, state='走路') {\n this.name = name;\n this.state = state;\n this.observers = [];\n }\n\n setState(state){\n this.state = state;\n this.observers.forEach(observer => observer.update(this))\n }\n\n setObserver(observer) {\n this.observers.push(observer)\n }\n }\n\n class Observer { // 观察者\n constructor() {\n\n }\n\n update(observer) {\n console.log(`${observer.name}正在${observer.state}`)\n }\n }\n </script>\n </body>\n</html>","css":"","js":""}
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