5b:T534,

What It Does

Easily check the completion status of multiple quests (with or without a quest title):

83907 Dornogal Chisel
83908 Earthen Excavator's Shovel
83909
83910 Arathi Precision Drill

Output:

Dornogal Chisel: complete
Earthen Excavator's Shovel: incomplete
83909: complete
Arathi Precision Drill: incomplete

Usage

Open add-on by typing /qcheck.
Paste your quests IDs into the input. Ensure that each quest ID is at the start of a newline. The quest ID will be taken as the first word of the line. The rest of the line will be the quest title.
Press the Check button.
This will print the results to the chat window.

Roadmap

If the add-on gains traction the plan would be to preload the add-on with quest titles so that they don't need to be provided. WoW only caches quests which are in your quest log & does not store all quest titles in game. There is currently not way to dynamically query quest titles.

Motivation

Macros are limited to 256 characters & running IsQuestFlaggedCompleted for each quest becomes tedious. Doing the follow for each quest is painful:

/run print(C_QuestLog.IsQuestFlaggedCompleted(232509))

5c:T459,The MIT License Copyright (c) <year> <copyright holders> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Quest Check