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JavaScript Tricky Interview Questions

Last Updated: Sep 24, 2020,
Posted in Interview Questions,
10 Questions
JavaScript Tricky Interview Questions
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Below are the list of Best JavaScript Tricky Interview Questions and Answers

Type coercion is the process of converting value from one type to another (such as string to number, object to boolean, and so on)

By using Number.isInteger() function

str.trim() method is used to remove the white spaces from both the ends of the given string.

Syntax:

str.trim()

Return value: This method returns a new string, without any of the leading or the trailing white spaces.

You can use the following code to strip whitespaces from String in JavaScript:

<!DOCTYPE html> 

<html> 

  

<head> 

    <title> 

        How to remove spaces from 

        a string using JavaScript? 

    </title> 

</head> 

  

<body> 

    <h1 style="color: green"> 

        Online Interview Questions 

    </h1> 

      

    <b> 

        How to remove spaces from 

        a string using JavaScript? 

    </b> 

      

    <p> 

        Original string is:  

        Online Interviews Questions 

    </p> 

      

    <p> 

        New String is:  

        <span class="output"></span> 

    </p> 

      

    <button onclick="removeSpaces()"> 

        Remove Spaces 

    </button> 

      

    <script type="text/javascript"> 

        function removeSpaces() { 

            originalText =  

                "Online Interviews Questions"; 

          

            newText =  

                originalText.replace(/ /g, ""); 

          

            document.querySelector('.output').textContent 

                    = newText; 

        } 

    </script> 

</body> 

  

</html>

Output:

Strip Whitespaces
Caption

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