前端技术文章-Golang学习网

Go教程 Go问答 MySQL Redis 软件教程人工智能业界新闻 php教程 java教程 python教程 linux 前端常见问题 AI提示词作文画画

最新
最热

文章 · 前端 | 3星期前 |

JavaScript中使用WeakRef实现自动清理缓存的原理与实践

WeakRef结合FinalizationRegistry可实现自动清理缓存，当对象无强引用时被GC回收，回调触发键的移除，避免内存泄漏，适用于DOM节点、大数据对象等资源管理。

205 收藏
文章 · 前端 | 3星期前 |

未登录用户评论防护方法解析

本文详解如何在Django中拦截未登录用户的评论提交行为，通过在视图层添加is_authenticated校验，彻底避免AnonymousUser自动创建评论的问题，并提供可立即部署的代码修复方案。本文详解如何在Django中拦截未登录用户的评论提交行为，通过在视图层添加`is_authenticated`校验，彻底避免`AnonymousUser`自动创建评论的问题，并提供可立即部署的代码修复方案。在当前实现中，尽管模板（prod

163 收藏
文章 · 前端 | 3星期前 |

HTML表格添加地图显示的集成方法主要有以下几种：使用第三方地图API（如Google Maps、百度地图、高德地图）将表格中的地理位置数据（如经纬度或地址）与地图API结合，通过JavaScript动态渲染地图。示例：在表格中加入“地图”列，点击后弹出地图窗口或嵌入地图组件。嵌入地图iframe 通过标签直接嵌入地图页面，适合静态展示。例如：<iframe src="htt</a></div> <a href="/article/603150.html" class="img_box"><img src="/uploads/20260516/17789391376a0875018aa5f.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">要为HTML表格添加地图显示，核心步骤是提取地理位置数据并使用地图API渲染。首先，确保表格中包含经纬度或地址信息；其次，选择GoogleMaps或Leaflet等地图API；第三，通过JavaScript遍历表格，提取数据并整理为可用格式；第四，初始化地图并在对应位置添加标记；第五，为标记点添加信息窗口以增强交互体验；第六，若数据仅有地址，需调用地理编码服务将其转换为坐标。主流地图API包括GoogleMaps和Leaflet，前者功能全面但成本较高，后者轻量免费但功能较基础。处理大量数据时，可采用标记</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>251</span> <span class="collectBtn user_collection" data-type="article" data-id="603150"><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>   |  3星期前  |   <a href="javascript:;" class="aLightGray" title="html在线运行">html在线运行</a> </div> <div class="tit lineTwoOverflow"><a href="/article/603140.html" class="aBlack">HTML在线打印样式设计与纸质化输出方案</a></div> <a href="/article/603140.html" class="img_box"><img src="/uploads/20260516/17789387076a08735369e64.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">使用CSS媒体查询定义打印样式，隐藏非必要元素并调整布局；2.通过@page设置A4尺寸与页边距，避免内容截断；3.添加一键打印按钮调用window.print()；4.可选集成jsPDF或Puppeteer实现高质量输出。核心是确保内容在纸质环境中保持可读性与结构完整。</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>281</span> <span class="collectBtn user_collection" data-type="article" data-id="603140"><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>   |  3星期前  |   </div> <div class="tit lineTwoOverflow"><a href="/article/603127.html" class="aBlack">CSS响应式侧边栏折叠文字图标切换方法</a></div> <a href="/article/603127.html" class="img_box"><img src="/uploads/20260516/17789381106a0870fea91a6.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">侧边栏折叠时文字消失但图标保留的常见实现方式是用overflow:hidden、max-width:0和opacity:0组合控制文字可见性，配合transition实现平滑动画，并通过.sidebar-collapsed类和matchMedia精准切换状态，兼顾可访问性与响应式体验。</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>412</span> <span class="collectBtn user_collection" data-type="article" data-id="603127"><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>   |  3星期前  |   </div> <div class="tit lineTwoOverflow"><a href="/article/603125.html" class="aBlack">在HTML中，可以通过CSS的 transform-origin 属性来设置元素进行变形（如旋转、缩放等）时的基准锚点位置。这个属性决定了变换的起点，也就是元素围绕哪个点进行旋转或缩放。语法如下：transform-origin: [x] [y] [z];x：水平方向的锚点位置，可以是百分比、像素值、关键字（如 left、center、right）。y：垂直方向的锚点位置，同样可以是百分比、像素值</a></div> <a href="/article/603125.html" class="img_box"><img src="/uploads/20260516/17789380686a0870d40461d.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">transform-origin是独立CSS属性，须与transform并列声明，作用于整个变换链；双值语法为X后Y，支持关键字/百分比/像素混用；非默认原点用像素值会增加GPU计算负担。</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>108</span> <span class="collectBtn user_collection" data-type="article" data-id="603125"><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>   |  3星期前  |   </div> <div class="tit lineTwoOverflow"><a href="/article/603121.html" class="aBlack">HTML倒计时器制作教程：时间计算与显示技巧</a></div> <a href="/article/603121.html" class="img_box"><img src="/uploads/20260516/17789378746a08701260f5c.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">需用JavaScript实现网页倒计时：一、Date计算时间差并setInterval每秒更新；二、data-*属性解耦目标时间；三、requestAnimationFrame提升精度；四、padStart补零格式化；五、通过时区标记（如Z或+08:00）或时间戳规避本地偏差。</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>102</span> <span class="collectBtn user_collection" data-type="article" data-id="603121"><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>   |  3星期前  |   </div> <div class="tit lineTwoOverflow"><a href="/article/603118.html" class="aBlack">HTML实现文件下载功能_通俗易懂教程</a></div> <a href="/article/603118.html" class="img_box"><img src="/uploads/20260516/17789377076a086f6b95d61.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">关键在于服务端响应头必须设置Content-Disposition:attachment，而非依赖download属性；因download仅对同源URL生效，跨域、file://协议或服务端未配响应头时均会失效。</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>453</span> <span class="collectBtn user_collection" data-type="article" data-id="603118"><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>   |  3星期前  |   </div> <div class="tit lineTwoOverflow"><a href="/article/603108.html" class="aBlack">JavaScript惰性函数实现及优势解析</a></div> <a href="/article/603108.html" class="img_box"><img src="/uploads/20260516/17789372616a086dad67384.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">惰性函数是在首次调用时完成初始化并重写自身、后续调用直接执行优化逻辑的函数；它通过首次判断环境后替换函数引用，避免重复检测开销，适用于高频调用且判断逻辑较重的场景。</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>203</span> <span class="collectBtn user_collection" data-type="article" data-id="603108"><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>   |  3星期前  |   </div> <div class="tit lineTwoOverflow"><a href="/article/603107.html" class="aBlack">HTML转义优化特殊字符处理技巧</a></div> <a href="/article/603107.html" class="img_box"><img src="/uploads/20260516/17789372056a086d7597460.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">直接用innerHTML插入用户输入会引发XSS和DOM错乱，因浏览器将<script>等字符解析为HTML；关键在于按上下文（文本节点、属性值、JS字符串等）精准转义或使用textContent/DOMPurify。</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>167</span> <span class="collectBtn user_collection" data-type="article" data-id="603107"><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>   |  3星期前  |   </div> <div class="tit lineTwoOverflow"><a href="/article/603106.html" class="aBlack">BEM命名CSS面包屑导航路径与分隔符样式</a></div> <a href="/article/603106.html" class="img_box"><img src="/uploads/20260516/17789371656a086d4d05e84.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">Breadcrumb必须严格使用breadcrumb__element--modifier命名，块名是语义锚点；当前页应为breadcrumb__item--current作用于li，分隔符用li:not(:last-child)::before控制，中间项需保留DOM仅隐藏。</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>379</span> <span class="collectBtn user_collection" data-type="article" data-id="603106"><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>   |  3星期前  |   </div> <div class="tit lineTwoOverflow"><a href="/article/603104.html" class="aBlack">HTML5 localStorage如何替代Cookie存储方案</a></div> <a href="/article/603104.html" class="img_box"><img src="/uploads/20260516/17789370216a086cbd305a7.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">localStorage不能直接替换Cookie，因二者语义不同：Cookie自动随请求发送、支持服务端控制字段和HttpOnly，localStorage纯客户端、无自动传输与过期机制、存取需手动序列化且不安全。</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>380</span> <span class="collectBtn user_collection" data-type="article" data-id="603104"><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>   |  3星期前  |   </div> <div class="tit lineTwoOverflow"><a href="/article/603096.html" class="aBlack">判断一个对象是否在另一个对象的原型链上，可以使用 isPrototypeOf() 方法。该方法用于检查某个对象是否是另一个对象的原型（即是否存在于该对象的原型链中）。语法：prototype.isPrototypeOf(object)prototype：要检查是否为原型的对象。object：要检查其原型链的对象。示例说明：function Person() {} const person = ne</a></div> <a href="/article/603096.html" class="img_box"><img src="/uploads/20260516/17789366186a086b2a9058f.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">isPrototypeOf()用于检测原型链关系，调用在潜在原型对象上并传入待检测对象，返回布尔值；它比instanceof更底层灵活，不依赖构造函数，仅检查实际原型链。</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>265</span> <span class="collectBtn user_collection" data-type="article" data-id="603096"><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>   |  3星期前  |   </div> <div class="tit lineTwoOverflow"><a href="/article/603087.html" class="aBlack">CSS计数器重置失败怎么解决</a></div> <a href="/article/603087.html" class="img_box"><img src="/uploads/20260516/17789362536a0869bd468e3.jpg" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">counter-reset在子元素中不生效，根本原因是它只对后续同级或后代中满足作用域条件的counter-increment生效，且重置动作不继承、不传播、不穿透伪元素边界。</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>333</span> <span class="collectBtn user_collection" data-type="article" data-id="603087"><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>   |  3星期前  |   </div> <div class="tit lineTwoOverflow"><a href="/article/603083.html" class="aBlack">HTML视频添加字幕方法\_WebVTT格式详解</a></div> <a href="/article/603083.html" class="img_box"><img src="/uploads/20260516/17789360796a08690f0387c.png" onerror="this.onerror='';this.src='/assets/images/moren/morentu.png'" alt=""></a> <div class="cont lineFourOverflow">track标签不添加字幕，仅声明外部轨道；显示依赖WebVTT合规性、路径可访问、浏览器加载成功及用户启用。</div> <div class="clear"></div> <div class="opt"> <div class="left"> <span><i class="view"></i>440</span> <span class="collectBtn user_collection" data-type="article" data-id="603083"><i class="collect"></i>收藏</span> </div> <div class="clear"></div> </div> </li> </ul> <div class="mngfPage"><a href="/articlelist/88_new_0_246.html" class="prevPage on"></a> <a href="/articlelist/88_new_0_1.html">1</a><a href="/articlelist/88_new_0_246.html">246</a><a class="currentPage">247</a><a href="/articlelist/88_new_0_248.html">248</a><a href="/articlelist/88_new_0_500.html">500</a> <a href="/articlelist/88_new_0_248.html" class="nextPage on"></a></div> </div> </div> <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet"> <div class="footer"> <ul> <li ><a href="/" class="aLightGray"><em class="material-icons">home</em><span>首页</span></a></li> <li class="curr"><a href="/articlelist.html" class="aLightGray"><em class="material-icons">menu_book</em><span>阅读</span></a></li> <li ><a href="/courselist.html" class="aLightGray"><em class="material-icons">school</em><span>课程</span></a></li> <li ><a href="/ai.html" class="aLightGray"><em class="material-icons">smart_toy</em><span>AI助手</span></a></li> <li ><a href="/user.html" class="aLightGray"><em class="material-icons">person</em><span>我的</span></a></li> </ul> </div> <script src="/assets/js/require.js" data-main="/assets/js/require-frontend.js?v=1671101972"></script> <script> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?3dc5666f6478c7bf39cd5c91e597423d"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); </script> <script> let flaga = 1; var category_id = 88; let strbiaoqian = ''; let zhankaihtml = ''; // let zhankaihtml = '<div class="zhankaiflag biaoqianone " style="display: inline-block;" onclick="zhankaiflagclick(this);">展开<i></i></div>'; let shouqihtml = ''; // let shouqihtml = '<div class="zhankaiflag biaoqianone zhankai" style="display: inline-block;" onclick="zhankaiflagclick(this);">收起<i></i></div>'; let allhtml = ''; let fumo = ''; $(".userInfo1 .biaoqianone").each(function(){ var href = $(this).attr('href'); var cat_id = $(this).data('id'); let cuc = '<a href="'+href+'" class="biaoqianone" style="display: inline-block;">'; if(category_id!==0&&category_id==cat_id){ cuc ='<a href="javascript:;" class="biaoqianone hover" style="display: inline-block;">'; } fumo = cuc; allhtml+=fumo+$(this).html()+'</a>'; 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>