jimyuan

var top = obj.getBoundingClientRect().top //元素顶端到可见区域顶端的距离
var se = document.documentElement.clientHeight //浏览器可见区域高度。
if(top <= se ) {
 //code
}

jimyuan

.disable-hover {
  pointer-events: none;
}

jimyuan

// A simple mixin to give dimensions to a box.
@mixin box($width, $height: $width) {
  width: $width;
  height: $height;
}

// clearfix 
@mixin clearfix {
  &:after {
    content: "";

jimyuan

/// Convert one unit into another
/// @author Hugo Giraudel
/// @param {Number} $value - Initial value
/// @param {String} $unit - Desired unit
/// @return {Number}
/// @throw Error if `$unit` does not exist or if units are incompatible.
@function convert-unit($value, $unit) {
  $units: (
    'px': 0px,
    'cm': 0cm,

jimyuan

//----------------------------------------------------//
// compass css sprite for x or 2x or 3x background image
//----------------------------------------------------//

$sprites-spacing: 5px;
@import "icons/*.png";      // got a variable named $icons-sprites
// @import "icons-2x/*.png";   // got a variable named $icons-2x-sprites
// @import "icons-3x/*.png";   // got a variable named $icons-3x-sprites
 
@mixin get-sprite( $map, $sprite, $x: 1, $adjustX: 0, $adjustY: 0, $positionAdjustY: 0, $repeat: no-repeat ) {