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html quote escape

王林

May 21, 2023 am 11:13 AM

In HTML, quotation marks are a special character used to contain text or attribute values. However, in some cases, quotes may interfere with the parsing and recognition of HTML code and therefore need to be escaped.

When quotation marks need to be used in HTML code, they need to be escaped into specific entity characters so that the browser can parse and display them correctly. There are two entity characters in HTML that escape quotes: "and".

In HTML, double quotes are the standard way to define attribute values. When the attribute value contains double quotes, it needs to be escaped using entity characters. For example:

<a href="https://example.com" title="This is an "example"">Link</a>

In the above example, the value of the attribute title contains double quotes, so it needs to be escaped with ".

Another entity character to escape quotes is ", which does the same thing as ", but in some cases it may be more appropriate to use. For example, when writing HTML code in JavaScript, using entity characters" can avoid certain syntax errors.

In addition to double quotes, there are single quotes in HTML, which are usually used for the abbreviation of attribute values. When single quotes need to be escaped, the entity characters ' or ' can be used.

<a href='https://example.com' title='This is an &apos;example&apos;'>Link</a>

In the above example, the value of the attribute title contains single quotes, so it needs to be escaped using the entity character '.

It should be noted that in HTML, when single quotes are used to define attributes, double quotes do not need to be escaped, and vice versa. For example:

<a href='https://example.com' title="This is an example">Link</a>

In the above example, the value of the attribute title contains double quotes, but since single quotes are used, there is no need to escape them.

To summarize, quotation marks are one of the special characters in HTML and need to be escaped frequently. In HTML, there are two types of escaped entity characters for quotation marks, which are "and". When you need to escape single quotes, you can use the entity characters ' or '. When writing HTML code, proper quote escaping can avoid syntax errors and parsing problems, thereby improving the reliability and readability of your code.

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