md/public/assets/scripts/sync-scroll.js
2020-02-11 17:51:04 +08:00

24 lines
642 B
JavaScript

// 左右栏同步滚动
$(document).ready(() => {
let timeout
$('div.CodeMirror-scroll, #preview').on('scroll', function callback () {
clearTimeout(timeout)
let source = $(this)
let target = $(source.is('#preview') ? 'div.CodeMirror-scroll' : '#preview')
target.off('scroll')
let source0 = source[0]
let target0 = target[0]
let percentage = source0.scrollTop / (source0.scrollHeight - source0.offsetHeight)
let height = percentage * (target0.scrollHeight - target0.offsetHeight)
target0.scrollTo(0, height)
timeout = setTimeout(() => {
target.on('scroll', callback)
}, 100)
})
})