Hướng dẫn html attribute list
HTML attributes provide additional information about HTML elements. Show
HTML Attributes
The href AttributeThe You will learn more about links in our HTML Links chapter. The src AttributeThe Notes: External images might be under copyright. If you do not get permission to use it, you may be in violation of copyright laws. In addition, you cannot control external images; it can suddenly be removed or changed. 2. Relative URL - Links to an image that is hosted within the website. Here, the URL does not include the domain name. If the URL begins without a slash, it will be relative to the current page. Example: src="img_girl.jpg". If the URL begins with a slash, it will be relative to the domain. Example: src="/images/img_girl.jpg". Tip: It is almost always best to use relative URLs. They will not break if you change domain. The width and height AttributesThe Try it Yourself » You will learn more about images in our HTML Images chapter. The style AttributeThe You will learn more about styles in our HTML Styles chapter. The lang AttributeYou should always include the The following example specifies English as the language: ... Country
codes can also be added to the language code in the The following example specifies English as the language and United States as the country: ... You can see all the language codes in our HTML Language Code Reference. The title AttributeThe The value of the title attribute will be displayed as a tooltip when you mouse over the element: We Suggest: Always Use Lowercase AttributesThe HTML standard does not require lowercase attribute names. The title attribute (and all other attributes) can be written with uppercase or lowercase like title or TITLE. However, W3C recommends lowercase attributes in HTML, and demands lowercase attributes for stricter document types like XHTML. At W3Schools we always use lowercase attribute names. We Suggest: Always Quote Attribute ValuesThe HTML standard does not require quotes around attribute values. However, W3C recommends quotes in HTML, and demands quotes for stricter document types like XHTML. Good:Bad:Sometimes you have to use quotes. This example will not display the title attribute correctly, because it contains a space: At W3Schools we always use quotes around attribute values. Single or Double Quotes?Double quotes around attribute values are the most common in HTML, but single quotes can also be used. In some situations, when the attribute value itself contains double quotes, it is necessary to use single quotes:
Or vice versa: Chapter Summary
HTML ExercisesTest Yourself With ExercisesExercise:Add a "tooltip" to the paragraph below with the text "About W3Schools". W3Schools is a web developer's site. Start the Exercise HTML Attribute ReferenceA complete list of all attributes for each HTML element, is listed in our: HTML Attribute Reference. |