• 04jQuery操作03


    day24

    特性 attributes VS 属性 properties
    attribute:
      值为string
      不区分大小写
      会在html中呈现
    property:
      值为string,boolean,number,object
      区分大小写
      不影响html

    1.如果attributes是本来在DOM对象中就存在的,attributes和
    properties的值会同步;
    2.如果attributes是本来在DOM对象中就存在的,但是类型为
    Boolean,那么attributes和properties的不会同步;
    3.如果attributes不是DOM对象内建的属性,attributes和
    properties的值不会同步;

    操作元素的特性
      获取特性的值:attr(name)
      设置特性的值:attr(name.value) attr({title:'new title'}) atrr(name,function(index,previousValue){})
      删除特性:removeAttr(name) 加空格可以多个删除

    操作元素的属性
      获取属性的值:prop(name)
      设置属性的值:prop(name,value)prop(properties)
      删除属性:removeProp(name) 加空格不能多个删除

    在元素中存取数据
      获取数据的值:data([name])
      设置数据的值:data(name,value) data(object)
      删除数据的值:removeData(name)
      判断是否有数据:jQuery.hasData(element)

    特性属性.html:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Document</title>
    </head>
    <body>
        <img id="logo" src="log.jpg" alt="jQuery logo" class="img-jQuery" title="jQuery logo">
        <img id="logo2" src="log.jpg" alt="jQuery logo2" class="img-jQuery2" title="jQuery logo2">
        <input type="checkbox" id="check" tabindex="1" style=" 50px; height: 50px;" title="check this!" description="just a checkbox" checked>
        <script src="jquery-3.3.1.js"></script>
        <script>
            /*var logo = document.getElementById('logo')
            console.log(logo);
            console.log(logo.title);
            console.log(logo.getAttribute("title"));*/
    
            // var check = document.getElementById('check');
            /*console.log(check.checked);
            console.log(check.getAttribute('checked'));
            
            check.setAttribute('checked',false);
    
            console.log(check.checked);
            console.log(check.getAttribute('checked'));*/
    /*
            console.log(check.description);
            console.log(check.getAttribute('description'));
            check.description = 'just';
            check.setAttribute('description','asdf');
            console.log(check.description);
            console.log(check.getAttribute('description'));*/
        </script>
    </body>
    </html>
    View Code

    操作元素的属性.html:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Document</title>
    </head>
    <body>
        <img id="logo" src="log.jpg" alt="jQuery logo" class="img-jQuery" title="jQuery logo">
        <img id="logo2" src="log.jpg" alt="jQuery logo2" class="img-jQuery2" title="jQuery logo2">
        <input type="checkbox" id="check" tabindex="1" style=" 50px; height: 50px;" title="check this!" description="just a checkbox" checked = 'checked'>
        <script src="jquery-3.3.1.js"></script>
        <script>
            $(function () {
                //获取属性
                console.log($('#check').prop('checked'))
                //设置属性
                console.log($('#check').prop('checked',true))
                console.log($('#check').attr('checked'))
                //删除属性
                console.log($('#check').removeProp('checked'))
                console.log($('#check').removeProp('title'))
                console.log($('#check').prop('title'))
                console.log($('#check').prop('checked'))
            })
        </script>
    </body>
    </html>
    View Code

    操作元素的特性.html:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Document</title>
    </head>
    <body>
        <img id="logo" src="log.jpg" alt="jQuery logo" class="img-jQuery" title="jQuery logo">
        <img id="logo2" src="log.jpg" alt="jQuery logo2" class="img-jQuery2" title="jQuery logo2">
        <input type="checkbox" id="check" tabindex="1" style=" 50px; height: 50px;" title="check this!" description="just a checkbox" checked>
        <script src="jquery-3.3.1.js"></script>
        <script>
            $(function () {
                console.log($("#check"));
                //获取特性
                console.log($('#check').attr('title'))
                //设置特性
                $('#check').attr('title','check that!')
                console.log($('#check').attr('title'))
                //删除特性
                $("#check").removeAttr('title')
                console.log($('#check').attr('title'))
            })
    
        </script>
    </body>
    </html>
    View Code

    在元素中存取数据.html:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Document</title>
    </head>
    <body>
        <img id="logo" src="log.jpg" alt="jQuery logo" class="img-jQuery" title="jQuery logo" data-data1 = '123'>
        <img id="logo2" src="log.jpg" alt="jQuery logo2" class="img-jQuery2" title="jQuery logo2">
        <input type="checkbox" id="check"  style=" 50px; height: 50px;" title="check this!" data-data2 = 'false' description="just a checkbox" checked = 'checked' tabindex="1">
        <p></p>
        <script src="jquery-3.3.1.js"></script>
        <script>
            $(function () {
                var img = $('img')
                var check = $('#check')
                //获取数据
                console.log(img.data())
                //设置数据
                check.data('dat',true)
                console.log(check.data())
                //删除数据
                check.removeData('dat')
                console.log(check.data())
                //判断是否有数据
                console.log($.hasData(check.get(0)))
                console.log($.hasData($('p').get()))    
            })
        </script>
    </body>
    </html>
    View Code
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  • 原文地址:https://www.cnblogs.com/shink1117/p/8525720.html
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