A brief analysis of the addition, deletion, modification and search operations of html

With the development of the Internet, HTML has become one of the important languages ​​​​for website development. Adding, deleting, modifying, and checking HTML is one of the key links in the Web development process. This article will introduce the adding, deleting, modifying, and checking operations of HTML.

1. Adding HTML

The adding of HTML mainly involves three aspects: tags, attributes and content. When editing HTML documents, we enrich and diversify web pages by adding tags, attributes, and content. Below we will introduce the adding operation of HTML in detail.

1. Add tags

Tags are one of the most basic elements in HTML documents. By using tags rationally, we can achieve web page layout, layout, text style and other functions. To add a new tag, just enter the tag name in a text editor. For example, to add a paragraph tag, you can enter the following code:

This is a paragraph tag

2. Add attributes

Attributes Is a component of a tag that describes specific properties of the tag. There are many kinds of attributes in HTML. Here are just a few commonly used attributes:

(1) class attribute: defines the class name of the HTML element
(2) id attribute: defines the unique attribute of the HTML element ID
(3) name attribute: defines the name of the HTML element
(4) style attribute: defines the style of the HTML element

To add an attribute, just add the corresponding attribute to the tag. , for example, to add a class attribute, you can enter the following code:

This is a paragraph tag

3. Add content

The content of HTML documents is composed of tags and attributes. By adding content, web pages can be enriched and diversified. To add a piece of content, just add content in the tag. For example, to add a link, you can enter the following code:

Baidu, you will know

2. HTML deletion operation

HTML deletion mainly involves three aspects: tags, attributes and content. When editing HTML documents, we often need to delete certain tags, attributes or content to achieve a certain layout or style effect. Below we will introduce the HTML deletion operation in detail.

1. Delete tags

To delete a tag, just select the tag and use the Ctrl X or Del key. For example, to delete a paragraph tag, select the tag and use the Ctrl X or Del keys to delete it.

2. Delete attributes

To delete an attribute, just delete the value of the corresponding attribute in the tag. For example, to delete the class attribute of the paragraph tag above, you can delete the value "myclass" of the class attribute.

3. Delete content

To delete a piece of content, just select the content and use the Ctrl X or Del key. For example, to delete the link above, select the link and delete using the Ctrl X or Del keys.

3. HTML modification operations

HTML modification mainly focuses on tags, attributes and content. Through modification, the layout, style and content of the web page can be changed. Below we will introduce the modification operation of HTML in detail.

1. Modify tags

To modify a tag, just replace the original tag with a new tag. For example, to change the above paragraph tag to a title tag, you can change the original code to the following code:

This is a title tag

2 .Modify attributes

To modify an attribute, just modify the value of the corresponding attribute in the tag. For example, to modify the class attribute value of the paragraph tag above to "newclass", you can modify the original code to the following code:

This is a paragraph tag

3. Modify content

To modify a piece of content, just select the content and modify it as new content. For example, to change the link text above to "Baidu Click", you can select the link and modify its text to "Baidu Click".

4. HTML search operation

HTML search operation is very important. Through search, we can quickly find the required tags, attributes and content, etc., thereby completing web development work faster. Below we will introduce the search operation of HTML in detail.

1. Find a tag

To find a tag, you can use the Ctrl F key to open the search dialog box and enter the tag name to search. For example, to find a paragraph tag, use the Ctrl F key to open the find dialog box and enter "

" to search.

2. Find attributes

To find an attribute, you can use the Ctrl F key to open the search dialog box and enter the attribute name to search. For example, to find the class attribute of the paragraph tag above, you can use the Ctrl F key to open the search dialog box and enter "class" to search.

3. Find content

To find a content, you can use the Ctrl F key to open the search dialog box and enter the content to search. For example, to find the link text "Baidu Click" above, you can use the Ctrl F key to open the search dialog box and enter "Baidu Click" to search.

Summarize

HTML addition, deletion, modification and query operations are an integral part of the Web development process. By rationally using HTML's addition, deletion, modification, and search operations, we can create richer and more diverse web page effects. At the same time, HTML addition, deletion, modification and query operations also need to be used in conjunction with other Web technologies to achieve more accurate and efficient operation results.

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