Sha256: 7288a77e819e24ab240619c5fa8c90dd784324d57d96bde6eb82e994d794cb8a
Contents?: true
Size: 1.74 KB
Versions: 19
Compression:
Stored size: 1.74 KB
Contents
((window) -> (
# LCS COUNTER
LCS_OK = 0.1
LCS_BAD = 0.25
TTL_TIMEOUT = 2000
MAX_TIMEOUT = 15000
__print = (msg, value) ->
info_css = 'color: silver;'
if value >= LCS_BAD
result_css = 'color: red; font-weight: bold;'
tag_css = 'color: red; font-weight: bold;'
tag = 'ERROR'
else if value >= LCS_OK
result_css = 'color: orange; font-style: italic;'
tag_css = 'color: orange; font-weight: bold;'
tag = 'WARN'
else
result_css = 'color: green;'
tag_css = 'color: green; font-weight: bold;'
tag = 'OK'
console.debug '%cMEASURE: %c<%s> %c%s', info_css, tag_css, tag, result_css, msg
__ttlTimeout = undefined
__lcs = ->
clsValue = 0
__unsub = undefined
__finTimeout = undefined
performanceObserver = new PerformanceObserver (performanceEntryList) ->
performanceEntries = performanceEntryList.getEntries()
clearTimeout(__ttlTimeout) if __ttlTimeout?
__ttlTimeout = setTimeout __unsub, TTL_TIMEOUT
for entry in performanceEntries
if !entry.hadRecentInput
clsValue += entry.value
__print "lcs updated #{clsValue.toFixed(3)}(+#{entry.value.toFixed(3)})", clsValue
console.debug 'INIT LCS COUNTER...'
performanceObserver.observe
type: 'layout-shift'
buffered: true
__unsub = ->
performanceObserver.disconnect('layout-shift')
__ttlTimeout = undefined
if __finTimeout?
clearTimeout(__finTimeout)
__finTimeout = undefined
__print "result #{clsValue.toFixed(3)}", clsValue
__finTimeout = setTimeout __unsub, MAX_TIMEOUT
__check_offset = ->
if window.scrollY <= 300
# init LCS counter
setTimeout __lcs, 1
setTimeout __check_offset, 1
))(window)
Version data entries
19 entries across 19 versions & 1 rubygems