Table of Contents
回复讨论(解决方案)
Home Web Front-end HTML Tutorial 我一个正则表达式,如何判定里面不包含某个内容的_html/css_WEB-ITnose

我一个正则表达式,如何判定里面不包含某个内容的_html/css_WEB-ITnose

Jun 21, 2016 am 09:47 AM

本帖最后由 qq914260102 于 2013-11-06 15:06:27 编辑

比如:我要写一个正则表达式,不包含,"正确"两个字的(不正确、不正确的)的这种情况也要考虑进去。

如果反过来,必须元包含"正确"两个字的(不正确、不正确的)的这种情况也要考虑进去。
又该怎么写呢。

回复讨论(解决方案)

str.indexOf("正确")==-1不包含 反之包含

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script><script type='text/javascript'>	var reg=/正确/;	alert(reg.test("我鹅鹅鹅正确的"));	alert(reg.test("我鹅鹅鹅四十四"));</script>
Copy after login

这个是包含正确,不包含if(!reg.test("我鹅鹅鹅正确的"))

(?!(?:正确)).*

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

What is the purpose of the <datalist> element? What is the purpose of the <datalist> element? Mar 21, 2025 pm 12:33 PM

The article discusses the HTML &lt;datalist&gt; element, which enhances forms by providing autocomplete suggestions, improving user experience and reducing errors.Character count: 159

What is the purpose of the <progress> element? What is the purpose of the <progress> element? Mar 21, 2025 pm 12:34 PM

The article discusses the HTML &lt;progress&gt; element, its purpose, styling, and differences from the &lt;meter&gt; element. The main focus is on using &lt;progress&gt; for task completion and &lt;meter&gt; for stati

How do I use HTML5 form validation attributes to validate user input? How do I use HTML5 form validation attributes to validate user input? Mar 17, 2025 pm 12:27 PM

The article discusses using HTML5 form validation attributes like required, pattern, min, max, and length limits to validate user input directly in the browser.

What is the purpose of the <iframe> tag? What are the security considerations when using it? What is the purpose of the <iframe> tag? What are the security considerations when using it? Mar 20, 2025 pm 06:05 PM

The article discusses the &lt;iframe&gt; tag's purpose in embedding external content into webpages, its common uses, security risks, and alternatives like object tags and APIs.

What is the purpose of the <meter> element? What is the purpose of the <meter> element? Mar 21, 2025 pm 12:35 PM

The article discusses the HTML &lt;meter&gt; element, used for displaying scalar or fractional values within a range, and its common applications in web development. It differentiates &lt;meter&gt; from &lt;progress&gt; and ex

What are the best practices for cross-browser compatibility in HTML5? What are the best practices for cross-browser compatibility in HTML5? Mar 17, 2025 pm 12:20 PM

Article discusses best practices for ensuring HTML5 cross-browser compatibility, focusing on feature detection, progressive enhancement, and testing methods.

What is the viewport meta tag? Why is it important for responsive design? What is the viewport meta tag? Why is it important for responsive design? Mar 20, 2025 pm 05:56 PM

The article discusses the viewport meta tag, essential for responsive web design on mobile devices. It explains how proper use ensures optimal content scaling and user interaction, while misuse can lead to design and accessibility issues.

How do I use the HTML5 <time> element to represent dates and times semantically? How do I use the HTML5 <time> element to represent dates and times semantically? Mar 12, 2025 pm 04:05 PM

This article explains the HTML5 &lt;time&gt; element for semantic date/time representation. It emphasizes the importance of the datetime attribute for machine readability (ISO 8601 format) alongside human-readable text, boosting accessibilit

See all articles