What is the use of spread operator?

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Do I need var in javascript?

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How do you extend classes Code snippet: const circle = { radius: 20, diameter() { return this.radius * 2; }, perimeter: () => 2 * Math.PI * this.radius };

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How to convert json string to object?

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What is a javascript code?

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What is the difference between undefined and not defined in JavaScript?

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How to create an object in javascript?

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Which company developed JavaScript?

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Name the types of functions.

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The below script is working Internet browser but not working in mozilla plz find that good way... function doSubmit(op){ var rowcount=document.getElementsByName ("parameterTypeId").length; var parameterGrade; var performance; var goal; if(op == "save"){ for (var i=0; i < rowcount; i++) { var param=eval("document.forms [0].parameterGrade"+i); if(param.value != "select"){ return true; } } alert("Please rate atleast one attribute"); return false; }//if ends here

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What will be the output of the code below? var Y = 1; if (function F(){}) { y += Typeof F;</span> } console.log(y);

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How can you do a character count in javascript?

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