How to use 'how to access variable outside function in javascript' in JavaScript

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6get(variable) {
7 return this.data[variable]
8}
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61forEachVariable(callback, thisObj) {
62 if (!this.nestedVariables) {
63 return;
64 }
65
66 this.nestedVariables.vars.forEach(callback, thisObj);
67}

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