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Know the principle + can change the model details man: read the paper, read the paper, read the paper! Read source code read source code read source code! The source code reading here is not limited to reading the source code of one framework. You can look at other excellent frameworks. For the implementation mechanism of the same layer and the same function, you can think more, summarize more and write more. After a long time, there will definitely be gains. The purpose of reading the paper is to directly obtain the original author's thoughts, avoiding obtaining second-hand thoughts from blog interpretation of the paper. After all, everyone's understanding is different, and it is not necessarily right. Read it first, then look at other understandings, and discuss with Daniel more, thus broadening the thinking.Sprinkle powder　　绅士段田课长，面貌一新重入职场……Therefore, if there are three layers above this (form, document, window) and all three layers define the onclick attribute, when the click event of the button is generated, four (including one of the buttons themselves) will be called or four statements will be executed.至于其他的小娃儿，要么在玩水，要不就被家人拎上船去了。宋义询问一面之缘，详谈甚欢的沛公刘邦，以期得到帮助