Javascript 开发工具。你是说上两个版本的$（'#link1'）？@user51462是的，你说得对，是打字错误，我已经编辑过了 $("#changeme").data('progress','100'); $("#changeme").attr('data-prog

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开发工具。你是说上两个版本的

$（'#link1'）

？@user51462是的，你说得对，是打字错误，我已经编辑过了

$("#changeme").data('progress','100');

$("#changeme").attr('data-progress','100');
$("#changeme").prop('data-progress','100');

<div id="changeme" style="padding-left:10px;" class="tox-progress" data-size="120" data-thickness="8" data-progress="23" data-color="#229922" data-background="aqua" data-speed="500">
    <div class="tox-progress-content" data-vcenter="true">
        <p style="padding-left:40px;padding-top:10px;"></p>
    </div>
</div>

.attr({"data-progress":"25"}),

<a id="link1" data-test="initvalue" href="#">link1!</a>

console.log( $('#link1').data('test') );
//outputs "initvalue"

// update the old value 
$('#link1').data('test', 'newvalue');

console.log( $('#link1').attr('data-test') );
//outputs "initvalue" as the attribute was never changed

console.log( $('#link1').data('test') );
//outputs "newvalue" as the value has been updated on the object

<div id="data" data-progress-bar="20"></div>

$("#data").data("progress-bar",100);
console.log($("#data").data("progress-bar")); //consoles 100

<div id="changeme"  style="padding-left:10px;" class="tox-progress" data-size="120" data-thickness="8" data-color="#229922" data-background="aqua" data-progress="23" data-speed="500">
<div class="tox-progress-content" data-vcenter="true">
    <p style="padding-left:40px;padding-top:10px;"></p>
</div>

var a = $('#mydiv').data('data-thickness'); //getter

$('#mydiv').data('data-thickness',20); //setter