html is escaped

In the modern Internet era, HTML (Hypertext Markup Language) as a markup language is widely used in web design and development. The basic function of HTML is to stipulate how to combine text, pictures, audio, video and other media elements to present a beautiful, concise and easy-to-understand effect on the web page. However, sometimes we encounter some problems, such as HTML being escaped. This article will explain the reasons why HTML is escaped and possible solutions.

1. The reason why HTML is escaped

In HTML, some special characters are used to express some special meanings. For example, the left angle bracket "<" and the right angle bracket ">" are used to indicate the start and end of HTML tags respectively. If we want to display these special characters in HTML, we need to use their escape symbols. There are some commonly used escape symbols in HTML, such as:

< means less than sign (<)

> means greater than sign (>)

& means & symbol

" means double quotation mark

' means single quotation mark

If we do not use these escape symbols and use these special characters directly in HTML, they will be The browser interprets it as the characters used in the HTML code, causing an error on the page.

2. Solution to HTML being escaped

So, when we encounter HTML when writing HTML code What should you do when the problem is escaped? Here are several possible solutions.

1. Use escape symbols

The easiest way is of course to use Escape symbols. We only need to replace special characters with the corresponding escape symbols. For example, if we want to display the less than sign "<" in HTML, we need to use the escape symbol "<". If we want to display the less than sign "<" in HTML. To display the greater than sign ">" in HTML, you need to use the escape symbol ">". Using escape symbols can ensure that special characters are parsed correctly and can be displayed normally no matter which browser and version they are in.

2. Using CDATA

In addition to using escape symbols, we can also use the CDATA (Character Data) section to solve the problem of HTML being escaped. In the CDATA section, we can include Any character, including special characters, without using escape characters. The syntax format for using CDATA segments is as follows:

Here is the original content, which can contain special characters

]]>

The starting tag of the CDATA segment is "". Between these two tags, you can Contains arbitrary text information. However, it should be noted that this method only applies to XML (eXtensible Markup Language) documents, not HTML documents.

3. Disable HTML escaping mechanism

The third method is to disable the HTML escaping mechanism. We can use the "

" tag or CSS style to disable the HTML escaping mechanism. For example, we can add the following code in HTML: </p>
<p><pre class="brush:php;toolbar:false"></p>
<p>This is custom text, which can contain special characters. </p>
<p>

In this way, we can add it here< Write arbitrary code in the middle of the pre> tag without using escape symbols, and special characters will be rendered correctly.

In addition to using the "

" tag, we can also use CSS styles to Disable HTML escaping mechanism. We can define the following styles in the CSS style sheet: 

*, :before, :after {
content: none;
}
This style All pseudo-elements, including invisible content, will be disabled. Be aware, however, that disabling the HTML escaping mechanism may cause some security issues, as it may make the page vulnerable to cross-site scripting attacks (XSS). 
Summary
HTML escaping is a common problem in HTML writing, which may cause errors on the page. This article introduces the reasons why HTML is escaped and possible solutions, including using escape symbols, using CDATA segments and disabling the HTML escaping mechanism. When we encounter the problem of HTML being escaped when writing HTML code, we can choose different solutions according to our needs. 
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