I am trying to understand the difference between the two 'require' statements below.
Specifically, what is the purpose of the { }
s wrapped around ipcMain
?
const electron = require('electron') const {ipcMain} = require('electron')
They both appear to assign the contents of the electron
module, but they obviously function differently.
Can anyone shed some light?
Yes, it works, but only up to a single line just after an 'if' or 'else' statement. If multiple lines are required to be used then curly braces are necessary.
In javascript code, curly brackets are used to deconstruct an object.
No, curly braces are not necessary, However, one very important reason to use the curly brace syntax is that, without it, there are several debuggers that will not stop on the line inside the if statement.
The curly braces are used only for import when export is named. If the export is default then curly braces are not used for import.
The second example uses destructuring.
This will call the specific variable (including functions) that are exported from the required module.
For example (functions.js):
module.exports = { func1, func2 }
is included in your file:
const { func1, func2 } = require('./functions')
Now you can call them individually,
func1() func2()
as opposed to:
const Functions = require('./functions')
are called using dot notation:
Functions.func1() Functions.func2()
Hope this helps.
You can read about destructuring here, it is a very useful part of ES6 and can be used with arrays as well as objects.
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