Some small points in HTML/CSS recently obtained (1)_html/css_WEB-ITnose

1. The and tags are used to emphasize certain words in a paragraph. Italic by default, Bold by default. In emphatic tone, expresses stronger emphasis than . At present, domestic front-end programmers prefer to use to express emphasis.

2. The browser will automatically add double quotes to the short text reference tag .

3. The browser parses the long text quotation tag <blockquote> in an indented style (both sides of the quotation paragraph are indented).

4. When inserting a line of code into a web page, you can use the tag. If you want to insert multiple lines of code, use the

 tag. </p> <p> </p> <p>5. The <a> tag can be used to send emails conveniently using mailto. The details are as follows: </p> <p></p> <p> </p> <p>6. All form controls (text boxes, text fields, buttons, radio boxes, check boxes, etc.) must be placed in < form></form> tags (otherwise the information entered by the user may not be submitted to the server). </p> <p> </p> <p>7. The name values ​​of radio buttons in the same group must be consistent, so that they can play the role of radio selection. </p> <p> </p> <p>8. The drop-down list can also perform multiple selection operations. Set the multiple="multiple" attribute in the <select> tag to achieve the multiple selection function. Under the Widows operating system , when making multiple selections, press the Ctrl key and click simultaneously (use Command click under Mac) to select multiple options. </p> <p> </p> <p>9. There is a button called the "Reset" button: </p> <p class="sycode"> <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="precsshui"><input type = "reset" value = "重置">

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10. Sub-selector (>) only acts on the first generation descendants of the element, and the descendant selector (space) acts on all descendant elements.

11. Currently, the "pseudo-class selector" a:hover is compatible with all browsers (in fact, there are many pseudo-class selectors, especially in CSS3, but it is not compatible with all browsers) device). In fact, :hover can be placed on any tag, such as p:hover, but their compatibility is also very poor, so the combination of a:hover is more commonly used now.

12. Letter-spacing can set text spacing or letter spacing in web page layout.