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Next, define the Light.prototype.init method, which is responsible for creating a real button node in the page. Assuming that this button is the switch button of the light, when the onclick event of the button is triggered, that is, when the light switch is pressed, the code is as follows:范文轩略微的停顿之后，继续说道：尹旭现在是越王了，可是越国的封地不大，又是在江东一隅，想要发展起来并不容易。若是能在山外歼灭之，最好不过。The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From Baidu裴秀智在剧中饰演虽然考上了大学，但为了赚取超过1亿韩元的机会费用，退学后几乎什么兼职都做过的徐达美。 因为很早就开始了社会生活，人脉广，关系好。 不想输给嫁给财阀二世的姐姐，怀着乔布斯的梦想走上了苦难的道路。 南柱赫将担任三山科技创始人南道山。 他喜欢编程，小时候就获得了数学奥林匹克最年轻大奖，是南氏家族的期望。过了15年后的今天，却是家破人亡的状态。 和朋友们一起投身创业，创业已经2年了但是只浪费了投资资金。 这是裴秀智和南柱赫的首次组合。 就像两位演员的相遇一样，导演和作家的期待也很大。 裴秀智是继朴惠莲作家的《dream high》,《当你沉睡时》之后的第3部作品。 吴忠焕导演凭借《Doctors》,《当你沉睡时》和《德鲁纳酒店》接连的成功成为了"heat制造者"。　　However, ...The event is released immediately after execution. For example, if the event is executed immediately, the event will be automatically deleted after execution. The event can be viewed by calling multiple times or waiting for execution.