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The first scheme is to use the general coding method to realize the preloading technology of the picture. First, create the imgNode element, Then when the method myImage.setSrc is called, a preloaded picture is given to the picture first, and when the picture is loaded, the img element is assigned a value. The second scheme is implemented by using proxy mode. MyImage function is only responsible for creating img elements, proxy function ProxyImage is responsible for setting loading pictures for the picture, and when the picture is really loaded, myImage.setSrc method in myImage is called to set the path of the picture. The advantages and disadvantages between them are as follows:Look at the code of the database connection pool:该剧讲述了一群以林山河与崔珍妍为首的高中时期好友，在十年后，为了帮助男主角夏拾走出因为女主角叶桑榆的意外而造成的心理创伤，通过一款体验游戏，将故事带回十年前的学生时代，在虚拟的游戏世界还原当年谜案的真相找回失去的友情故事。6小灰只顾喘气，哪里还有力气回应他，可怜它脖子都快断了。和尚闻言大喜，妄杀忠良。另一名幕僚道：在下听说刘季之前不过是泗水亭长，是个骗吃骗喝的无赖，胸无大志，胆小怕事。