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根据官方的建议：具有 true 和 false 两个属性的属性，如 checked, selected 或者 disabled 使用prop()，其他的使用 attr()To retrieve <span class="keyword" style="margin: 0px; padding: 0px; line-height: 1.8; color: rgb(51, 51, 51); font-family: Monaco, Menlo, Consolas, &quot;Courier New&quot;, monospace; font-size: 12px; white-space: pre-wrap; font-weight: bold;">and change DOM properties such <span class="keyword" style="margin: 0px; padding: 0px; line-height: 1.8; color: rgb(51, 51, 51); font-family: Monaco, Menlo, Consolas, &quot;Courier New&quot;, monospace; font-size: 12px; white-space: pre-wrap; font-weight: bold;">as the checked, selected, <span class="keyword" style="margin: 0px; padding: 0px; line-height: 1.8; color: rgb(51, 51, 51); font-family: Monaco, Menlo, Consolas, &quot;Courier New&quot;, monospace; font-size: 12px; white-space: pre-wrap; font-weight: bold;">or disabled state of form elements, <span class="keyword" style="margin: 0px; padding: 0px; line-height: 1.8; color: rgb(51, 51, 51); font-family: Monaco, Menlo, Consolas, &quot;Courier New&quot;, monospace; font-size: 12px; white-space: pre-wrap; font-weight: bold;">use the .prop() method. 经验&nbsp; 做项目时记得用prop(&#39;checked&#39;，true)设置状态时生效 <p style="margin-top: 0px; margin-bottom: 10px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: Arial, 微软雅黑; white-space: normal; background-color: rgb(255, 255, 255); color: rgb(68, 68, 68); text-size-adjust: auto;">具有 true 和 false 两个属性的属性，如 checked, selected 或者 disabled 使用prop()，其他的使用 attr()，具体见下表：<p style="margin-top: 0px; margin-bottom: 10px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 14px; line-height: 24px; font-family: Arial, 微软雅黑; white-space: normal; background-color: rgb(255, 255, 255); color: rgb(68, 68, 68); text-size-adjust: auto;"><img src="/ueditor/php/upload/image/20181106/1541486000806891.png" alt="" style="margin: 0px; padding: 0px; border: 0px currentcolor; max-width: 600px; height: auto; vertical-align: middle; cursor: pointer;"/>