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In web development, Picture preloading is a common technique, If you set the src attribute directly to the img tag node, If the picture is larger, Or if the network speed is relatively slow, Before the picture is loaded, The picture will be a blank scene for a period of time. This is not good for the user experience, so at this time we can use a loading loading picture as a placeholder to prompt the user that the picture is being loaded before the picture is loaded. After the picture is loaded, we can directly assign a value to the picture. The following code is as follows when we do not use proxy mode to preload pictures:The following list one by one.托德·施特劳斯-斯古尔森将执导新线影业新片[难道不浪漫](Isn’t It Romantic,暂译)。影片由蕾蓓尔·威尔森主演，讲述一位刻薄女孩的平凡生活一夜之间变作了充满浪漫的爱情喜剧，她也由此成为朋友们的话题中心。斯古尔森以拍摄喜剧见长，2015年他导演的[幸存的女孩]曾入围多伦多电影节。杨长帆刚背一个开头就被徐文长早早打断。该剧讲述了可爱乐观的田螺姑娘陆玥儿和深情专一的花间城主花亦南发生的有趣爱情故事。Encapsulate a request into an object so that you can parameterize customers with different requests. Queuing or logging requests and supporting undoable operations.