Question: Prior to ECMAScript 5 , forgetting to declare a variable before using it in a JavaScript statement often caused debugging problems. That s because an

Prior to ECMAScript 5, forgetting to declare a variable before using it in a JavaScript statement often caused debugging problems. Thats because an undeclared variable was treated as a
Prior to ECMAScript 5, forgetting to declare a variable before using it in a JavaScript statement often caused debugging problems. Thats because an undeclared variable was treated as a
undeclared variable
local variable
global variable
strict variable

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