附示例的 jQuery add() 方法
jQuery 中的 add() 方法用于将元素添加到一个现有元素组中。
语法
语法如下所示:
$(selector).add(ele,context)
上方,ele 是选择器表达式,而上下文则指定选择器表达式应从何处开始匹配。
示例
现在让我们看一个实现 jQuery add() 方法的示例:
<!DOCTYPE html> <html> <head> <style> .one { color: white; background-color: blue; } </style> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script> <script> $(document).ready(function(){ $("h2").add("p").addClass("one"); }); </script> </head> <body> <h1>Products</h1> <h2>Out-of-stock products</h2> <p>Let us now see some products.</p> <span>We had Accessories</span><br> <span>We also had Books, which are now out-of-stock.</span><br> <p>Electronics products sold completely.</p> </body> </html>
输出
这将产生以下输出:
示例
现在让我们看另一个示例:
<!DOCTYPE html> <html> <head> <style> .one { color: white; background-color: orange; } </style> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script> <script> $(document).ready(function(){ $("h1").add("h2").add("p").addClass("one"); }); </script> </head> <body> <h1>Products</h1> <h2>Out-of-stock products</h2> <p>Let us now see some products.</p> <span>We had Accessories</span><br> <span>We also had Books, which are now out-of-stock.</span><br> <p>Electronics products sold completely.</p> </body> </html>
输出
这将产生以下输出:
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