How would you check if a variable is null/undefined?


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More JavaScript Interview Questions

What is the role of javascript in html?

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What is the use of a map object in javascript?

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Name the numeric constants representing max, min values?

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What is the function of delete operator?

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What is an undefined value in JavaScript?

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What is event bubbling in the dom?

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How to create an object using javascript?

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How to get complete current page url with javascript?

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What value does prompt() return if the user clicked the cancel button?

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What is event bubbling and capturing in javascript?

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If an array with name as "names" contain three elements, then how will you print the third element of this array?

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How to define a anonymous function?

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