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Use js dom and jquery to implement simple additions, deletions and modifications_jquery
Use js dom and jquery to implement simple additions, deletions and modifications_jquery
Software development is actually about adding, deleting, modifying and checking data, and JavaScript front-end development is no exception. Today I learned the simple use of jquery framework. So I used it to implement simple additions, deletions and modifications, and then used original javascript to implement the same function in order to see the power of jquery:
The code is as follows:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script type="text/javascript" src="jq/jquery-1.9.1.js"></script>
<script type="text/javascript">
$(function(){
gaoliang();
var $seldel = undefined;
var seldel = undefined;
//高亮选中
function gaoliang() {
$("li").click(function () {
$("li").css(
"backgroundColor", "red"
);
this.style.backgroundColor = "yellow";
$seldel = $(this);
seldel = this;
});
}
//使用jquery添加对象
$("#btnAdd1").click(function () {
var input = window.prompt("输入数据");
var $newli = $("<li>" + input + "</li>");
$newli.appendTo("#Ol");
gaoliang();
});
//使用dom元素添加对象
document.getElementById("btnAdd2").onclick = function () {
var input = window.prompt("输入数据");
var newli = document.createElement("li");
newli.innerHTML = input;
document.getElementById("Ol").appendChild(newli);
gaoliang();
}
//使用jquery删除对象
$("#btnDel1").click(function () {
$seldel.remove();
});
//使用dom元素删除对象
document.getElementById("btnDel2").onclick = function () {
seldel.parentNode.removeChild(seldel);
}
//使用jquery插入数据
$("#btnInsert1").click(function () {
var input=window.prompt("输入插入的数据");
var $newli=$("<li>"+ input+"</li>");
$newli.insertBefore($seldel);
gaoliang();
});
//使用dom插入数据
document.getElementById("btnInsert2").onclick = function () {
var Ol = document.getElementById("Ol");
var input = window.prompt("输入插入的数据");
var newli = document.createElement("li");
newli.innerHTML = input;
Ol.insertBefore(newli, seldel);
gaoliang();
}
//使用jquery编辑选中的数据
$("#btnEdit1").click(function () {
var oldtxt = $seldel.html();
var $edit = $("<input id='btnE' type='text' value='" + oldtxt + "'/>");
$seldel.html($edit);
$edit.focus();
$edit.blur(function () {
var newtxt = $(this).val();
$seldel.html(newtxt);
});
});
//使用dom编辑选中的数据
document.getElementById("btnEdit2").onclick = function () {
var edittext = document.createElement("input");
edittext.type = "text";
edittext.value = seldel.innerHTML;;
seldel.innerHTML = "";
seldel.appendChild(edittext);
edittext.focus();
edittext.onblur = function () {
seldel.innerHTML = edittext.value;
}
}
} )
</script>
</head>
<body>
<ol id="Ol">
<li id="haha">1</li>
<li>2</li>
<li>3</li>
<li>4</li>
</ol>
<input id="btnAdd1" type="button" value="jquery添加数据" />
<input id="btnAdd2" type="button" value="dom添加数据" />
<input id="btnDel1" type="button" value="jquery删除数据" />
<input id="btnDel2" type="button" value="dom删除数据" />
<input id="btnInsert1" type="button" value="jquery插入数据" />
<input id="btnInsert2" type="button" value="dom插入数据" />
<input id="btnEdit1" type="button" value="jquery编辑数据" />
<input id="btnEdit2" type="button" value="dom编辑数据" />
</body>
</html>
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