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什么是 jQuery?


jQuery

jQuery 是一个 JavaScript 库。

jQuery 极大地简化了 JavaScript 编程。

jQuery 很容易学习。


jQuery 显示和隐藏

使用 jQuery,您可以使用 hide() 和 show() 方法隐藏和显示 HTML 元素

示例

$("#hide").click(function(){
  $("p").hide();
});

$("#show").click(function(){
  $("p").show();
});
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jQuery 滑动

使用 jQuery,您可以在 HTML 元素上创建滑动效果

  • slideDown()
  • slideUp()
  • slideToggle()

示例

$("#flip").click(function(){
  $("#panel").slideDown();
});
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jQuery 动画

示例

$("button").click(function(){
  $("div").animate({
    left: '250px',
    height: '+=150px',
    width: '+=150px'
  });
}); 
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jQuery 操作 CSS

示例

$("button").click(function(){
  $("h1, h2, p").toggleClass("blue");
});
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