JavaScript验证存在的相关内容

文章 2023-10-02 来自：开发者社区

【趣味JavaScript】利用className原生自定义封装实现快速操作html元素中的class属性,功能包含添加、删除、替换、验证是否存在, 极简方式轻量级!【附代码】

个人主页极客小俊✍ 作者简介：web开发者、设计师、技术分享博主希望大家多多支持一下, 我们一起进步！如果文章对你有帮助的话，欢迎评论点赞收藏加关注我们可以使用className属性来实现对class类的设置,或者封装一些小函数自定义一个hasClass函数为了添加的class类不重复，所以我们在添加class类之前也应该判断一下当前元素是否已经存在了要添加的c...

问答 2016-03-19 来自：开发者社区

javascript如何验证数组是否存在某元素

如图所示，该语法是验证元素是否存在于数组对于单字符有效，字符串无效请问怎么高效的验证字符串数组是否存在某字符

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更新时间 2023-11-01 16:21:51

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