详解：:read-only只能读 只能写read-write 14

Document启用:"text" name="username" id="" class="test1"> 禁用:"text" name="username" id="" class="test1" readonly="readonly"> 启用:"test1"</span>><span class="token property">禁用</span><span class="token punctuation">:</span><textarea class=<span class="token string">"test1"</span> readonly=<span class="token string">"false"</span>><span class="token property">启用按钮</span><span class="token punctuation">:</span><input type=<span class="token string">"button"</span> name=<span class="token string">""</span> value=<span class="token string">"btn1"</span> class=<span class="token string">"test1"</span>> <span class="token property">启用按钮</span><span class="token punctuation">:</span><input type=<span class="token string">"submit"</span> name=<span class="token string">""</span> value=<span class="token string">"btn2"</span> class=<span class="token string">"test1"</span>> <span class="token property">启用按钮</span><span class="token punctuation">:</span><input type=<span class="token string">"reset"</span> name=<span class="token string">""</span> value=<span class="token string">"btn3"</span> class=<span class="token string">"test1"</span>> <span class="token property">禁用按钮</span><span class="token punctuation">:</span><input type=<span class="token string">"button"</span> name=<span class="token string">""</span> value=<span class="token string">"btn1"</span> class=<span class="token string">"test1"</span> disabled=<span class="token string">"disabled"</span>> <span class="token property">禁用按钮</span><span class="token punctuation">:</span><input type=<span class="token string">"submit"</span> name=<span class="token string">""</span> value=<span class="token string">"btn2"</span> class=<span class="token string">"test1"</span> disabled=<span class="token string">"disabled"</span>> <span class="token property">禁用按钮</span><span class="token punctuation">:</span><input type=<span class="token string">"reset"</span> name=<span class="token string">""</span> value=<span class="token string">"btn3"</span> class=<span class="token string">"test1"</span> disabled=<span class="token string">"disabled"</span>></pre>
<p>核心：<img src="https://img-blog.csdnimg.cn/20200426004706975.png" data-ke-src="https://img-blog.csdnimg.cn/20200426004706975.png" alt="在这里插入图片描述" /><br /> 火狐要适配。要加上-moz-</p><p>readonly=“readonly”<br /> readonly 属性规定输入字段为只读。<br /> 只读字段是不能修改的<br /> 问题可以不可以点击？<br /> 可以<br /> disabled=“disabled”<br /> disabled 属性规定应该禁用 input 元素。</p><p>被禁用的 input 元素既不可用，也不可点击</p><p>readonly=“false”，无效，也就是说不写就是这样。要写就写readonly="true"或者readonly="readonly"把<br /> 默认值，<br /> readonly=“true”<br /> 和readonly="readonly"一样，没有区别</p></div></div><div id="treeSkill"></div>