Or should I always use the following syntax? (And if so, why?)
I haven’t really found something about this in the JSON specifications. Although they use quotes around their keys in their examples.
Yes, you need quotation marks. This is to make it simpler and to avoid having to have another escape method for javascript reserved keywords, ie {for:”foo”}.
Original: https://www.cnblogs.com/OpenCoder/p/13588195.html
Author: PowerCoder
Title: Do the JSON keys have to be surrounded by quotes?（转载）
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