About the use of URL, href, SRC attributes

href (Hypertext Reference | Hypertext references )

References are associated with pages , Is in Establish a connection between the current element and the referenced resource .

Commonly used labels ：<link />、<a />

src (Source | resources )

Indicates that the resource will be referenced , Replace the current element ！

Commonly used labels ：<img /> 、<script /> 、<iframe / >、<embed / >

url (Uniform Resource Locator | Uniform resource locator )

As a general href or src Of value , You can use absolute paths , Relative paths , Three ways of anchor .

• absolute URL - Point to another site （ such as href="http://www.example.com/index.htm"）
• relative URL - Point to a file in the site （href="index.htm"）
• anchor URL - Point to the anchor in the page （href="#top"）