Revised Function.toString() Method
Function.toString() converts a function to a string representation, revealing its source code, including comments and formatting, facilitating debugging and dynamic code generation in JavaScript.
Syntax:
let result = myFunction.toString();
Example: Here the basic example of above mentioned method.
Javascript
function myFunction(name) { return `Hello, Geeks!`; } let result = myFunction.toString(); console.log(result); |
function myFunction(name) {
return `Hello, Geeks!`;
}
Supported browser:
- Chrome 1
- Edge 12
- Firefox 1
- Safari 1
- Opera 3
JS 2019 – ECMAScript 2019
ECMAScript 2019, also known as ES10, introduced features like Array.flat(), Array.flatMap(), Object.fromEntries(), and Symbol. description, and some string methods, for enhancing JavaScript’s capabilities and expressiveness.
JavaScript 2019 (ES10) or ECMAScript 2019 new features are:
|
Name |
Description |
| String.trimStart() |
trimming leading whitespace characters from a string. |
| String.trimEnd() |
removes trailing whitespace characters from the end of a string |
| Object.fromEntries |
Creates an object from a key-value pairs array. |
| Optional catch binding |
omitting the catch parameter in try-catch blocks, simplifying error handling |
| Array.flat() |
flattening nested arrays to a single-dimensional array. |
| Array.flatMap() |
mapping and flattening nested arrays simultaneously for streamlined operations. |
| Revised Array.Sort() |
Equal value elements retain relative positions during sorting. |
| Revised JSON.stringify() |
safely handles UTF-8 code points (U+D800 to U+DFFF) accurate compatibility with JSON.parse(). |
| Separator symbols allowed in string litterals |
separator symbols are allowed within numeric and string literals to improve readability without affecting their values |
| Revised Function.toString() |
converts a function to a string representation |
We will explore all the above methods along with their basic implementation with the help of examples.