I am using Steam's API to fetch player data. To do this you need to provide a steamID64 (76561197960435530) like this example shown here: http://api.steampowered.com/ISteamUserStats/GetUserStatsForGame/v0002/?appid=440&key=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX&steamid=76561197960435530 however this can sometimes be tricky for my users as many have their own custom vanity url which does not provide the steamID64 for them to easily input. I know they could use use a website to look it up but this is not an option.
How would I take the input of a custom vanity profile URL like this: https://steamcommunity.com/id/customNameHere and convert this programatically into a steamID64 like this: 76561197960435530
I would like to implement this using JavaScript or by using an API.
Found the solution. Here it says you can use the following syntax to resolve a vanity url:
http://api.steampowered.com/ISteamUser/ResolveVanityURL/v0001/?key=XXXXXXXXXXXXXXXXXXXXXXX&vanityurl=userVanityUrlName
Don't quite know why it was hiding on the TF2 wiki though. I could have found it at https://steamapi.xpaw.me/#ISteamUser/ResolveVanityURL.