How to use escape characters in html

HTML tag escaping refers to converting special characters in HTML into their corresponding character entities to avoid problems caused by these characters. In HTML, special characters are usually represented as entity names or entity numbers. The entity name generally consists of the symbol "&" followed by one or more letters and numbers, and the entity number consists of the symbol "" followed by one or more numbers. These escape characters can be used in HTML to ensure that special characters are rendered in the correct way.

Special characters in HTML include less than sign (<), greater than sign (>), single quotation mark ('), double quotation mark ("), ampersand (&), etc. These characters are in HTML There are special meanings, such as the less than sign is used to start an HTML tag, the greater than sign is used to end an HTML tag, single quotes and double quotes are used to define text strings in HTML, and symbols are used to represent special characters in HTML. To prevent these characters from being interpreted as their special meanings, they must be escaped to their corresponding character entities.

The entity names and entity numbers in HTML are predefined, and their corresponding character entities are also It is standardized. For example, the entity name of the greater than sign is ">", and the corresponding character entity is ">"; and if an entity number is used, the entity number of the greater than sign is ">", and the corresponding character entity is also ">". In HTML, the use of these special characters must be escaped in strict accordance with the prescribed method, otherwise it will cause problems such as abnormal page display or syntax errors.

In HTML, entity names It is slightly different from the usage of entity numbers. Entity names are usually used in place of English letters or common symbols, and their use is more intuitive and easy to understand. For example, to use the copyright symbol "©" in HTML, you can use the entity name "© ”, so that readers can more easily identify its meaning. Entity numbers are more suitable for replacing non-ASCII characters, such as Chinese, Japanese, Greek and other characters, which cannot be escaped directly using entity names. For example, to To express the Chinese character "Hello" in HTML, you can use the entity number "Hello".

In addition to the common special characters mentioned above, there are also some uncommon special characters in HTML, such as square brackets ([ and ]), curly braces ({ and }), backslash (\), etc. These characters must also be escaped in HTML, and the escaping method is similar to other special characters.

It should be noted that, When using special characters in HTML, you also need to consider the support of different browsers. Different browsers may have different support for the same special character. In actual development, you need to make a selection based on the compatibility of the browser.

In short, in HTML development, the correct use of entity names and entity numbers for escaping can help us better control the display effect of the page and reduce display problems caused by special characters. Be proficient in HTML tag escaping Methods and rules can effectively improve the efficiency and quality of page development.

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