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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:电影讲述的是第二次世界大战太平洋战争重要转折点——中途岛海战：经此一役，日本海军受到“降维打击”，美日海上实力反转，从而扭转了整个太平洋战场的局势。影片通过参战士兵和飞行员一个个鲜活的故事，带领观众逐步进入1942年6月初发生在太平洋中途岛附近那场令人难以置信的战争……也正是因为此事，吕马童的封侯希望算是彻底化为泡影，因此将产生一些什么后果，只有命运知晓。USA宣布续订《#南方女王# Queen of the South》第五季。期待。尹旭轻轻一笑，拨转马头，向着西城走去，想要看看高易、周大口中所言的惊喜到底是什么。