前端技术文章-Golang学习网

文章 · 前端 | 3星期前 |

HTML中没有原生的round函数，但可通过JavaScript实现四舍五入。以下为符合SEO且贴近游戏博主风格的标题： **HTML如何用JS实现round四舍五入**

HTML和CSS无round函数，必须用JavaScript实现；Math.round()仅支持整数四舍五入且负数按向正无穷取整，保留小数需手动缩放，严格四舍五入应避免toFixed()的银行家舍入。

416 收藏

文章 · 前端 | 3星期前 |

CSS过渡不生效？检查初始属性值与语法错误

transition失效的根本原因是浏览器未获取到明确的起始值或过渡声明未持续存在；需在基础样式中显式定义初始值和transition，避免写入:hover等伪类，禁用transition:all，JS操作时保持过渡类始终生效。

416 收藏

文章 · 前端 | 3星期前 | html

HTML中使用aria-required标注必填字段的方法如下：添加 aria-required="true" 属性在需要标记为必填的表单元素（如、

或 <select>）上，添加 aria-required="true" 属性。<input type="text" name="username" aria-required="true" />结合 requi</a></div>
                                <a href="/article/611976.html" class="img_box"><img src="/uploads/20260526/17797577716a14f2cb96459.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="HTML中使用aria-required标注必填字段的方法如下：添加 aria-required="true" 属性
在需要标记为必填的表单元素（如 <input>、<textarea> 或 <select>）上，添加 aria-required="true" 属性。<input type="text" name="username" aria-required="true" />结合 requi"></a>
                                <div class="cont lineFourOverflow">必须同时写required和aria-required="true"，前者触发浏览器原生校验、影响键盘类型及CSS伪类，后者确保屏幕阅读器正确播报；缺一则导致校验失效或无障碍支持缺失。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>416</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="611976"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                        <li class="li2">
                <div class="info lineOverflow">
                                        <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> ·
                                        <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a>
                                          |  2星期前  |  
                                    </div>
                <div class="tit lineTwoOverflow"><a href="/article/614922.html" class="aBlack">单例工厂模式重构前端插件架构</a></div>
                                <a href="/article/614922.html" class="img_box"><img src="/uploads/20260528/17799538186a17f09a25cca.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="单例工厂模式重构前端插件架构"></a>
                                <div class="cont lineFourOverflow">所谓“单例工厂”不是独立设计模式，而是单例生命周期管理与工厂函数创建逻辑的组合实践；它通过主应用启动时统一调用工厂、注入已实例化的单例对象，实现运行时动态依赖切换，避免插件内直接new导致的状态不一致、环境强耦合与测试脆弱等问题。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>416</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="614922"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                        <li class="li2">
                <div class="info lineOverflow">
                                        <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> ·
                                        <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a>
                                          |  2星期前  |  
                                    </div>
                <div class="tit lineTwoOverflow"><a href="/article/615179.html" class="aBlack">Base64转Uint8Array高效方法</a></div>
                                <a href="/article/615179.html" class="img_box"><img src="/uploads/20260528/17799664306a1821de79ccb.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="Base64转Uint8Array高效方法"></a>
                                <div class="cont lineFourOverflow">直接用atob解码Base64后通过charCodeAt映射为Uint8Array是最轻量且兼容性好的二进制数据解析方式，避免TextEncoder造成的UTF-8重编码错乱。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>416</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="615179"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                        <li class="li2">
                <div class="info lineOverflow">
                                        <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> ·
                                        <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a>
                                          |  2星期前  |  
                                    </div>
                <div class="tit lineTwoOverflow"><a href="/article/616718.html" class="aBlack">大厂代码评审：removeEventListener性能隐患排查</a></div>
                                <a href="/article/616718.html" class="img_box"><img src="/uploads/20260529/17800668576a19aa291a55c.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="大厂代码评审：removeEventListener性能隐患排查"></a>
                                <div class="cont lineFourOverflow">漏掉removeEventListener是高频内存泄漏雷区，需检查生命周期配对、避免匿名函数绑定、警惕全局目标监听及removeEventListener参数不匹配等风险。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>416</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="616718"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                        <li class="li2">
                <div class="info lineOverflow">
                                        <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> ·
                                        <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a>
                                          |  2星期前  |  
                                    </div>
                <div class="tit lineTwoOverflow"><a href="/article/617659.html" class="aBlack">响应式菜单技巧：伪类与定位应用</a></div>
                                <a href="/article/617659.html" class="img_box"><img src="/uploads/20260530/17801406936a1aca95ba3e3.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="响应式菜单技巧：伪类与定位应用"></a>
                                <div class="cont lineFourOverflow">纯CSS响应式多级菜单需桌面端用:hover+:focus-within、移动端禁用:hover改用data-open或:focus-within；二级菜单不显示主因是父li缺position:relative且子菜单误用visibility/opacity隐藏而非display:none。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>416</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="617659"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                        <li class="li2">
                <div class="info lineOverflow">
                                        <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> ·
                                        <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a>
                                          |  2星期前  |  
                                    </div>
                <div class="tit lineTwoOverflow"><a href="/article/618107.html" class="aBlack">HTML表单接入元宇宙方法解析</a></div>
                                <a href="/article/618107.html" class="img_box"><img src="/uploads/20260531/17801902606a1b8c34d6850.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="HTML表单接入元宇宙方法解析"></a>
                                <div class="cont lineFourOverflow">HTML表单不能直接集成到元宇宙，但可通过后端服务与Web3技术桥接，实现用户数据与虚拟世界的交互。当用户提交表单时，数据经服务器或前端Web3库处理，调用智能合约或元宇宙平台API，完成NFT铸造、身份注册、资产交易等操作；结合钱包连接、去中心化存储和API调用，表单成为通向元宇宙的数据入口；尽管面临跨平台互操作性、性能延迟、安全风险、用户体验割裂及技术迭代快等挑战，HTML表单仍可在信息收集、身份管理、动态内容触发和系统设置中发挥关键作用，作为高效、成熟的输入界面，持续赋能元宇宙应用的构建与交互。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>416</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="618107"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                        <li class="li2">
                <div class="info lineOverflow">
                                        <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> ·
                                        <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a>
                                          |  2星期前  |  
                                    </div>
                <div class="tit lineTwoOverflow"><a href="/article/619338.html" class="aBlack">HTML虚拟列表适合长列表吗？实用技巧分享</a></div>
                                <a href="/article/619338.html" class="img_box"><img src="/uploads/20260601/17802755766a1cd978d6ec9.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="HTML虚拟列表适合长列表吗？实用技巧分享"></a>
                                <div class="cont lineFourOverflow">虚拟列表是解决长列表渲染性能问题的方案，通过仅渲染可视区域元素、用transform定位及固定高度容器来避免DOM过载，不可混用非虚拟节点，宜配合游标分页而非传统分页。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>416</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="619338"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                        <li class="li2">
                <div class="info lineOverflow">
                                        <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> ·
                                        <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a>
                                          |  2个月前  |  
                                    </div>
                <div class="tit lineTwoOverflow"><a href="/article/537492.html" class="aBlack">CSS设置元素大小实战教程</a></div>
                                <a href="/article/537492.html" class="img_box"><img src="/uploads/20260320/177400905169bd3adbb5c49.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="CSS设置元素大小实战教程"></a>
                                <div class="cont lineFourOverflow">答案：CSS的min-width、max-width、min-height和max-height属性用于控制元素尺寸范围。1.min-width和max-width确保容器在不同屏幕下自适应且不超出合理宽度，如设置容器最大1200px、最小320px；2.min-height和max-height保证内容区域有足够高度并防止溢出，如卡片最小200px、最大400px并滚动显示超内容；3.实际使用中应避免与固定宽高冲突，配合overflow提升体验，适用于响应式布局中的图片、侧边栏、弹窗等场景。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>415</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="537492"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                        <li class="li2">
                <div class="info lineOverflow">
                                        <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> ·
                                        <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a>
                                          |  2个月前  |  
                                    </div>
                <div class="tit lineTwoOverflow"><a href="/article/538886.html" class="aBlack">Flexbox清除列表项水平空白方法</a></div>
                                <a href="/article/538886.html" class="img_box"><img src="/uploads/5389/c0caf2840300c430e64ca66ec239ab53.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="Flexbox清除列表项水平空白方法"></a>
                                <div class="cont lineFourOverflow">本文详解如何通过CSSFlexbox替代inline-block布局，从根本上消除<li>元素间因HTML源码换行与空格导致的意外水平间距，同时保持树形结构的层级清晰性与节点居中对齐。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>415</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="538886"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                        <li class="li2">
                <div class="info lineOverflow">
                                        <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> ·
                                        <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a>
                                          |  2个月前  |  
                                    </div>
                <div class="tit lineTwoOverflow"><a href="/article/540622.html" class="aBlack">Vue组件通信：Emit事件冒泡与多级联动解析</a></div>
                                <a href="/article/540622.html" class="img_box"><img src="/uploads/20260323/177423290969c0a54d4d3c8.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="Vue组件通信：Emit事件冒泡与多级联动解析"></a>
                                <div class="cont lineFourOverflow">$emit不会冒泡，仅通知直接父组件；需手动逐层$emit实现跨级传递，或改用provide/inject、mitt、Pinia等替代方案，并注意参数传递、命名规范与卸载清理。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>415</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="540622"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                        <li class="li2">
                <div class="info lineOverflow">
                                        <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> ·
                                        <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a>
                                          |  2个月前  |  
                                    </div>
                <div class="tit lineTwoOverflow"><a href="/article/542323.html" class="aBlack">触屏优化：CSS实现卡片翻转效果</a></div>
                                <a href="/article/542323.html" class="img_box"><img src="/uploads/20260324/177433690869c23b8c123af.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="触屏优化：CSS实现卡片翻转效果"></a>
                                <div class="cont lineFourOverflow">触屏卡片翻转不可靠因:hover在移动端不生效，推荐:focus-within+tabindex纯CSS方案，或JS控制class实现稳定翻转。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>415</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="542323"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                        <li class="li2">
                <div class="info lineOverflow">
                                        <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> ·
                                        <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a>
                                          |  2个月前  |  
                                    </div>
                <div class="tit lineTwoOverflow"><a href="/article/544341.html" class="aBlack">HTML兼容性查询方法详解</a></div>
                                <a href="/article/544341.html" class="img_box"><img src="/uploads/20260326/177448455069c47c466f54d.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="HTML兼容性查询方法详解"></a>
                                <div class="cont lineFourOverflow">查HTML标签或属性兼容性应优先使用caniuse.com，而非MDN；重点看“Knownissues”栏目，注意Safari对dialog、inert等特性的实际支持延迟及静默降级行为。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>415</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="544341"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                        <li class="li2">
                <div class="info lineOverflow">
                                        <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> ·
                                        <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a>
                                          |  2个月前  |  
                                    </div>
                <div class="tit lineTwoOverflow"><a href="/article/548112.html" class="aBlack">JavaScript实现多语言网页的技巧</a></div>
                                <a href="/article/548112.html" class="img_box"><img src="/uploads/20260328/177470907569c7e953d2acc.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt="JavaScript实现多语言网页的技巧"></a>
                                <div class="cont lineFourOverflow">JavaScript国际化（i18n）是支持多语言和区域设置的能力，本地化（l10n）是适配特定语言文化的过程；需用navigator.languages获取用户偏好、Intl.Locale解析语言标签、IntlAPI格式化日期数字、动态加载JSON资源，并处理RTL布局及HTML元信息同步更新。</div>
                <div class="clear"></div>
                <div class="opt">
                    <div class="left">
                        <span><i class="view"></i>415</span>
                        <span class="collectBtn user_collection" data-type="article" data-id="548112"><i class="collect"></i>收藏</span>
                    </div>
                    <div class="clear"></div>
                </div>
            </li>
                    </ul>
       <div class="mngfPage"><a href="/articlelist/88_hot_90_242.html" class="prevPage on"></a> <a href="/articlelist/88_hot_90_1.html">1</a><a href="/articlelist/88_hot_90_242.html">242</a><a class="currentPage">243</a><a href="/articlelist/88_hot_90_244.html">244</a><a href="/articlelist/88_hot_90_500.html">500</a> <a href="/articlelist/88_hot_90_244.html" class="nextPage on"></a></div>    </div>
</div>
<div class="footer">
    <ul>
      <li  ><a href="/" class="aLightGray"><em class="navIcon navIconHome"></em><span>首页</span></a></li>
      <li  class="curr"><a href="/articlelist.html" class="aLightGray"><em class="navIcon navIconRead"></em><span>阅读</span></a></li>
      <li  ><a href="/courselist.html" class="aLightGray"><em class="navIcon navIconCourse"></em><span>课程</span></a></li>
      <li  ><a href="/ai.html" class="aLightGray"><em class="navIcon navIconAi"></em><span>AI助手</span></a></li>
      <li ><a href="/user.html" class="aLightGray"><em class="navIcon navIconUser"></em><span>我的</span></a></li>
    </ul>
  </div>
  <script src="/assets/js/frontend/common.js" defer></script>
  <script src="/assets/js/juejin-theme.js?v=20260613b" defer></script>
	<script>
    var _hmt = _hmt || [];
    (function() {
        var hm = document.createElement("script");
        hm.src = "https://hm.baidu.com/hm.js?3dc5666f6478c7bf39cd5c91e597423d";
        hm.async = true;
        var s = document.getElementsByTagName("script")[0];
        s.parentNode.insertBefore(hm, s);
    })();
</script>

strbiaoqian+=fumo+$(this).html()+'</a>';
        // if(flaga<=8){
        // }
        flaga++;
    });
    strbiaoqian+=zhankaihtml;
    allhtml+=shouqihtml;
    $(".userInfo1").html(strbiaoqian);
    // function zhankaiflagclick(obj){
    //     if($(obj).html()=='展开<i></i>'){
    //         $(obj).html('收起<i></i>');
    //         $(obj).addClass('zhankai');
    //         $(".userInfo1").html(allhtml);
    //     }else{
    //         $(obj).html("展开<i></i>");
    //         $(obj).removeClass('zhankai');
    //         $(".userInfo1").html(strbiaoqian);
    //     }
    // }

$('.timeLimitBox').click(function(){
        $(this).toggleClass('hover')
    })
</script>
</body>
</html>