zoukankan      html  css  js  c++  java
  • #css# id & class 不能以数字开头

    [id='1800number_box'] {
     /* does work */
    }
    
    #1800number_box {
      /* doesn't work */
    }
    
    /* Or, you can "escape" the number, which looks funky but works: */
    #31 800number_box {
      /* does work */
    }

    [class="10"] {color: red;}

    html5可以支持以数字开头的id/class,但是css不支持:

    In CSS, identifiers (including element names, classes, and IDs in selectors) can contain only the characters [a-zA-Z0-9] and ISO 10646 characters U+00A0 and higher, plus the hyphen (-) and the underscore (_); they cannot start with a digit, two hyphens, or a hyphen followed by a digit. Identifiers can also contain escaped characters and any ISO 10646 character as a numeric code (see next item). For instance, the identifier “B&W?” may be written as “B&W?” or “B26 W3F”.
    
    W3C Specification
  • 相关阅读:
    3.16
    3.8
    3.7
    3.6
    3.5
    3.3
    3.2
    《机器学习十讲》学习报告一
    机器学习-集成算法
    机器学习-基于核的算法
  • 原文地址:https://www.cnblogs.com/tianmuxi/p/10448613.html
Copyright © 2011-2022 走看看