问题
When I paste a value into the Chrome console, Chrome adds a line below with a negative number.
At first I thought it related to the value, which exists in the document. However, as I back out each character the value underneath changes and then disappears. If I replace the later characters the value changes incrementally.
There's no tooltip or context menu on the line.
What the heck is that?
回答1:
It's the result of your calculation, Chrome thinks you're calculating..
001 minus 984 minus 52
回答2:
It's called Eager Evaluation, new in Chrome 68.
来源：https://stackoverflow.com/questions/54367127/what-are-the-characters-that-appear-under-a-value-entered-into-the-chrome-consol