<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[qq_52224073的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/qq_52224073</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; qq_52224073]]></copyright><item><title><![CDATA[innerHTML和innerText、value]]></title><link>https://blog.youkuaiyun.com/qq_52224073/article/details/130470544</link><guid>https://blog.youkuaiyun.com/qq_52224073/article/details/130470544</guid><author>qq_52224073</author><pubDate>Wed, 03 May 2023 10:32:12 +0800</pubDate><description><![CDATA[但是button和select和option比较特殊，可以用innerHTML来获取，用value反而不行。select和option既有value也有innerHTML属性，但一个是返回值，一个是返回文本。注意表单不可以通过innerHTML和innerText来获取值，只能通过value。textarea有value和innertext没有innerHTML。]]></description><category></category></item><item><title><![CDATA[代码简写1]]></title><link>https://blog.youkuaiyun.com/qq_52224073/article/details/130304368</link><guid>https://blog.youkuaiyun.com/qq_52224073/article/details/130304368</guid><author>qq_52224073</author><pubDate>Sat, 22 Apr 2023 14:16:14 +0800</pubDate><description><![CDATA[【代码】代码简写1。]]></description><category></category></item><item><title><![CDATA[css中元素和类之间有无空格的区别]]></title><link>https://blog.youkuaiyun.com/qq_52224073/article/details/130237865</link><guid>https://blog.youkuaiyun.com/qq_52224073/article/details/130237865</guid><author>qq_52224073</author><pubDate>Wed, 19 Apr 2023 10:24:20 +0800</pubDate><description><![CDATA[【代码】css中元素和类之间有无空格的区别。]]></description><category></category></item><item><title><![CDATA[JavaScript—出现NaN和undefined的原因]]></title><link>https://blog.youkuaiyun.com/qq_52224073/article/details/130051815</link><guid>https://blog.youkuaiyun.com/qq_52224073/article/details/130051815</guid><author>qq_52224073</author><pubDate>Wed, 19 Apr 2023 10:17:17 +0800</pubDate><description><![CDATA[let num但是注意如果一个未定义的变量加上一个字符串就变成字符串。]]></description><category></category></item><item><title><![CDATA[使用js时的注意事项]]></title><link>https://blog.youkuaiyun.com/qq_52224073/article/details/130222561</link><guid>https://blog.youkuaiyun.com/qq_52224073/article/details/130222561</guid><author>qq_52224073</author><pubDate>Tue, 18 Apr 2023 15:41:23 +0800</pubDate><description><![CDATA[是因为每次循环，我都执行了一次ul结构，导致一行一个ul。]]></description><category></category></item><item><title><![CDATA[break和return同时存在时的解决方法]]></title><link>https://blog.youkuaiyun.com/qq_52224073/article/details/130138278</link><guid>https://blog.youkuaiyun.com/qq_52224073/article/details/130138278</guid><author>qq_52224073</author><pubDate>Thu, 13 Apr 2023 19:40:26 +0800</pubDate><description><![CDATA[例如检测 香蕉 是否存在于 数组['苹果', '香蕉', '橘子', '荔枝', '梨子']中， 返回结果是 true。需求： 封装 some 函数查看数组是否存在某个元素。做法：添加一个flag=false的语句。]]></description><category></category></item><item><title><![CDATA[4.10—js笔记]]></title><link>https://blog.youkuaiyun.com/qq_52224073/article/details/130051557</link><guid>https://blog.youkuaiyun.com/qq_52224073/article/details/130051557</guid><author>qq_52224073</author><pubDate>Mon, 10 Apr 2023 20:42:16 +0800</pubDate><description><![CDATA[柱形图没有高——${num[i]} 和px中间不能有空格。span标签没有显示——不小心在< >中加空格了。]]></description><category></category></item><item><title><![CDATA[4.9—js笔记]]></title><link>https://blog.youkuaiyun.com/qq_52224073/article/details/130030847</link><guid>https://blog.youkuaiyun.com/qq_52224073/article/details/130030847</guid><author>qq_52224073</author><pubDate>Sun, 09 Apr 2023 21:50:01 +0800</pubDate><description><![CDATA[注意：在document可以在引号里加br能够成功，ptompt和alert不行。同理，左边若为真，那结果一定真，输出左边。若左边为假，则主要看右边的值，输出右边。代码是从左到右的，所以左边若为真，则主要看右边的值，若左边为假，那结果一定假。因为n++时，参与运算的n=1，运算后n=2。此时要换行的话可以使用` `反引号。四种方法都可以，最后一种比较推荐。特别注意：如果不写i++会死循环。用单、双引号的话，没办法换行。到++n时，n=2+1=3。所以结果为1+3+3=7。]]></description><category></category></item></channel></rss>