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author | kibigo! <marrus-sh@users.noreply.github.com> | 2017-11-17 19:11:18 -0800 |
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committer | kibigo! <marrus-sh@users.noreply.github.com> | 2017-11-17 19:29:16 -0800 |
commit | 45c44989c8fb6e24badd18bb83ac5f68de0aceaf (patch) | |
tree | 794d088986d8518506e3e1eec0c8ffb7da5604b8 /app/javascript/themes/glitch/util/schedule_idle_task.js | |
parent | 5a9982b425d3db65d813eb0314a27cea16f0f52d (diff) |
Forking glitch theme
Diffstat (limited to 'app/javascript/themes/glitch/util/schedule_idle_task.js')
-rw-r--r-- | app/javascript/themes/glitch/util/schedule_idle_task.js | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/app/javascript/themes/glitch/util/schedule_idle_task.js b/app/javascript/themes/glitch/util/schedule_idle_task.js new file mode 100644 index 000000000..b04d4a8ee --- /dev/null +++ b/app/javascript/themes/glitch/util/schedule_idle_task.js @@ -0,0 +1,29 @@ +// Wrapper to call requestIdleCallback() to schedule low-priority work. +// See https://developer.mozilla.org/en-US/docs/Web/API/Background_Tasks_API +// for a good breakdown of the concepts behind this. + +import Queue from 'tiny-queue'; + +const taskQueue = new Queue(); +let runningRequestIdleCallback = false; + +function runTasks(deadline) { + while (taskQueue.length && deadline.timeRemaining() > 0) { + taskQueue.shift()(); + } + if (taskQueue.length) { + requestIdleCallback(runTasks); + } else { + runningRequestIdleCallback = false; + } +} + +function scheduleIdleTask(task) { + taskQueue.push(task); + if (!runningRequestIdleCallback) { + runningRequestIdleCallback = true; + requestIdleCallback(runTasks); + } +} + +export default scheduleIdleTask; |