Interview knowledge points, computer network interview knowledge points

Interview knowledge points, computer network interview knowledge points

1. Box Model

Standard CSS box model = content + padding + border + margin;

IE box model: content + margin (content already contains padding + margin );

2. In-row elements? Block-level elements? Empty element?

Line Elements: a, B, span, img, input, strong, select, label, em, button, textarea

Block-level elements: div, ul, li, dl, dt, dd, p, h1-h6, blockquote

Empty elements: br, meta, hr, link, input, img

3. How does CSS align vertically?

<Style>

. Item {

Position: absolute;

Top: 50%;

Left: 50%;

Matgin-top:-1/2 * heght; // the height of the top margin offset-1/2. The actual value prevails.

Margin-left:-1/2 * width; // width of the left margin offset-1/2, subject to the actual

}

</Style>

<Div> * html. test {color: #090;}/* For IE6 and earlier */

* + Html. test {color: # ff0;}/* For IE7 */attribute Hack. test {color: #090 \ 9;/* For IE8 + */* color: # f00;/* For IE7 and earlier */_ color: # ff0; /* For IE6 and earlier */}