Q581. Can I avoid using postMessages completely?
You cannot avoid using postMessages completely(or 100%). Even though your application doesn’t use postMessage considering the risks, a lot of third party scripts use post...
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Q582. Is postMessages synchronous?
The postMessages are synchronous in IE8 browser but they are asynchronous in IE9 and all other modern browsers (i.e, IE9+, Firefox, Chrome, Safari).Due to this asynchrono...
Q583. What paradigm is Javascript?
JavaScript is a multi-paradigm language, supporting imperative/procedural programming, Object-Oriented Programming and functional programming. JavaScript supports Object-...
Q584. What is the difference between internal and external javascript?
**Internal JavaScript:** It is the source code within the script tag. **External JavaScript:** The source code is stored in an external file(stored with .js extension) an...
Q585. Is JavaScript faster than server side script?
Yes, JavaScript is faster than server side scripts. Because JavaScript is a client-side script it does not require any web server’s help for its computation or calculatio...
Q586. How do you get the status of a checkbox?
You can apply the `checked` property on the selected checkbox in the DOM. If the value is `true` it means the checkbox is checked, otherwise it is unchecked. For example,...
Q587. What is the purpose of double tilde operator?
The double tilde operator (`~~`) in JavaScript is known as the **double bitwise NOT operator**. It is commonly used as a shorthand idiom to truncate a floating-point numb...
Q588. How do you convert character to ASCII code?
You can use the `String.prototype.charCodeAt()` method to convert string characters to ASCII numbers. For example, let's find ASCII code for the first letter of 'ABC' str...
Q589. What is ArrayBuffer?
An ArrayBuffer object is used to represent a generic, fixed-length raw binary data buffer. You can create it as below, ```javascript let buffer = new ArrayBuffer(16); // ...
Q590. What is the output of below string expression?
```javascript console.log("Welcome to JS world"[0]); ``` The output of the above expression is "W". **Explanation:** The bracket notation with specific index on a string ...