In today's web design/development practice, using CSS to add style styles to semantic (X) HTML tags is critical. There is a perfect world in the designers ' dreams: All browsers are able to understand and apply CSS rules and have the same visual effect (no compatibility issues). However, we do not live in this perfect world, the reality of the theft is always the opposite, many CSS styles in different browsers have different interpretations and rendering.
Some of today's popular browsers, such as Firefox, Opera, Internet Explorer, Chrome, Safari, and so on, are in their own way to understand CSS specifications, This leads to the browser's interpretation of CSS and the designer's CSS definition of conflict, so that the appearance of the Web page in some browsers can be correctly displayed according to the designer's ideas, but some browsers do not follow the way the designer wants to display, which leads to browser compatibility issues. To make things worse, some browsers completely ignore some of the CSS's declarations and properties.
Because of these conflicts and problems still exist in this "imperfect world", so some designers think of a way to avoid browser compatibility problems, that is, CSS Reset, what is CSS reset? We can call it CSS Reset, others called CSS Reset, default CSS, CSS reset and so on. CSS reset is because the various browsers interpret the initial value of CSS style is different, causing the designer to not define a CSS property, different browsers will follow their own default values to the undefined style assignment, so we have to define some CSS style, To let all browsers interpret the CSS in the same way, so that this problem can be avoided.
CSS Reset (reset)