about functions in code that I don't know what they mean for what

Question

I have been learning Vue.js, but I have come across something I do not understand. What does the following code mean: _. ?

Answer 1

It has no intrinsic meaning.

The underscore is just a character that is valid in JavaScript identifiers.

 const _ = { hello: function() { console.log("Hello!"); } }; _.hello(); 

The code you are looking at could assign any value to it.

It might be the underscore library . It might be the lodash library . It might be something else entirely.