使用jQuery可以方便的添加新的HTML元素。
下面的方法用于添加HTML元素:
乍一看append,prepend 和after,before似乎功能一样,但append,prepend指在选中的元素本身(内部)的前面和后面,而after,before指在选择中的元素的前面和后面。
可以参考下面的append例子:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>JQuery Demo</title> <script src="scripts/jquery-1.9.1.js"></script> <script> $(document).ready(function () { $("#btn1").click(function () { $("p").append(" <b>Appended text</b>."); }); $("#btn2").click(function () { $("ol").append("<li>Appended item</li>"); }); }); </script> </head> <body> <p>This is a paragraph.</p> <p>This is another paragraph.</p> <ol> <li>List item 1</li> <li>List item 2</li> <li>List item 3</li> </ol> <button id="btn1">Append text</button> <button id="btn2">Append list items</button> </body> </html>
prepend示例:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>JQuery Demo</title> <script src="scripts/jquery-1.9.1.js"></script> <script> $(document).ready(function () { $("#btn1").click(function () { $("p").prepend("<b>Prepended text</b>. "); }); $("#btn2").click(function () { $("ol").prepend("<li>Prepended item</li>"); }); }); </script> </head> <body> <p>This is a paragraph.</p> <p>This is another paragraph.</p> <ol> <li>List item 1</li> <li>List item 2</li> <li>List item 3</li> </ol> <button id="btn1">Prepend text</button> <button id="btn2">Prepend list item</button> </body> </html>
append(),prepend()支持同时插入多个元素,下面的例子添加三个使用不同方法创建的新元素:
function appendText() { // Create element with HTML var txt1="<p>Text.</p>"; // Create with jQuery var txt2=$("<p></p>").text("Text."); // Create with DOM var txt3=document.createElement("p"); txt3.innerHTML="Text."; // Append the new elements $("p").append(txt1,txt2,txt3); }
下面的例子使用after,before 在指定的元素前后面添加新内容:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>JQuery Demo</title> <script src="scripts/jquery-1.9.1.js"></script> <script> $(document).ready(function () { $("#btn1").click(function () { $("img").before("<b>Before</b>"); }); $("#btn2").click(function () { $("img").after("<i>After</i>"); }); }); </script> </head> <body> <img src="/images/guidebee.jpg" alt="guidebee" width="120" height="125"> <br> <br> <button id="btn1">Insert before</button> <button id="btn2">Insert after</button> </body> </html>
同样after,before也支持同时插入多个元素:
function afterText() { // Create element with HTML var txt1="<b>I </b>"; // Create with jQuery var txt2=$("<i></i>").text("love "); // Create with DOM var txt3=document.createElement("big"); txt3.innerHTML="jQuery!"; // Insert new elements after img $("img").after(txt1,txt2,txt3); }