identifier has already been declared javascript

1// This problem can occur for many reasons 
2// It cannot be resolved without seeing code because it can happen for 
3// different reasons
4
5But it is worth having a look at
6
7	1.If you are doing code in console then keep in mind that:
8    	`let` and `const` variables, by design, can't be redeclared. 
9		When you write console code, you're writing it all in 
10		the same scope, even if you hit enter and write more 
11		code again. Because of this, you're re-declaring them,
12		breaking this rule, and causing an error.
13
14Things you can do:
15	1. use `var`. Not always convenient, especially if copy-pasting code
16	reload the page/console. Similarly, not always convenient if you want to 
17    maintain whatever state your page currently has
18
19	2. rename your variables. Depending on how many variables you have, 
20      can be annoying, especially for copy-paste code.
21
22	3. remove `let` after the first run, simply re-defining 
23	the value instead of re-declaring the variable. 
24    If you're re-using the same code again and again, 
25	this at least becomes a change you only need to make once.
26
27	4. wrap your code in a block {...}. Less inconvenient, 
28      but works since `let` and `const` are block scoped and 
29      they won't be creating declarations in the global scope 
30      that can't be overritten by similarly named declarations. 
31      The problem with this is that you won't be able to access your 
32      variables if you try to enter a new console command since they 
33      don't exist in that scope.