How to Dynamically Access Global Variables by Name in JavaScript?

Dynamically Accessing Global Variables by Name in JavaScript

Question:

Consider the following JavaScript code:

<script>
//in script 1
var someVarName_10 = 20;
</script>

How can you access the variable someVarName_10 from a different script using its variable name?

<script>
  const num = 10;
  alert(all_vars['someVar' + 'Name_' + num]);
</script>

Answer:

Yes, it is possible to access local variables by name using the window object:

<script>
//in script 2
alert(window["someVarName_10"]); //alerts 20
</script>

Updated Answer (for edited question):

If you access the window object directly, you can concatenate the variable name dynamically using brackets notation:

<script>
  const num = 10;
  alert(window['someVar' + 'Name_' + num]); //alerts 20
</script>

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