软件开发实际就是数据的增删改查,javascript前端开发也不例外。今天学了jquery框架的简单使用。于是用它实现简单的增删改,接着也用原始的javascript实现同样的功能,以便看出jquery的强大:
代码如下:
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<!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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