Created
July 23, 2017 03:00
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背景固定(RAF/onScroll両方)
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| function setupFixedBg() { | |
| const $fixed = $('.js-fixed-bg'); | |
| const $wrapper = isSP() ? $(window) : $('.wrapper'); | |
| let _tmpTop = $wrapper.scrollTop(); | |
| (function _update() { | |
| const top = $wrapper.scrollTop(); | |
| if(top !== _tmpTop) { | |
| $fixed.css('transform', `translateY(${top}px)`); | |
| } | |
| _tmpTop = top; | |
| requestAnimationFrame(_update); | |
| })(); | |
| // $wrapper.on('scroll', () => { | |
| // const top = $wrapper.scrollTop(); | |
| // if(top !== _tmpTop) { | |
| // $fixed.css('transform', `translateY(${top}px)`); | |
| // } | |
| // _tmpTop = top; | |
| // }) | |
| } |
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