Define a global variable in a JavaScript function

Question

Can anyone help me how I can able to define global variable in a JavaScript function?

Answer 1

There is multiple ways to set the variable as a global in JavaScript, you can use var at global scope so that it will become a global variable.

<script>

var yourGlobalVariable;

function foo() {

    // ...

}

</script>

Also, you can use globalThis, if you are using any modern environments:

<script>

function foo() {

    globalThis.yourGlobalVariable = ...;

}

</script>

I hope this will help.

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