What does es6 syntactic sugar mean?

es6 syntax sugar refers to the syntax in a programming language that can more easily express an operation; using syntax sugar can increase the readability of the program, thereby reducing the chance of program code errors. The new syntax sugar in ES6 is actually ES5 can also be implemented, but it will be slightly more complicated.

The operating environment of this tutorial: Windows 10 system, ECMAScript version 6.0, Dell G3 computer.

es6 What does syntactic sugar mean?

About the understanding of syntactic sugar:

refers to a certain grammar added to computer language. This grammar It has no impact on the functionality of the language, but it is more convenient for programmers to use. Generally speaking, using syntactic sugar can increase the readability of the program, thereby reducing the chance of program code errors.

The new syntactic sugar added in ES6 can actually be implemented in ES5, but it will be slightly more complicated

In computer science, syntactic sugar refers to the easier expression in programming languages. An operation syntax that makes it easier for programmers to use the language: operations can become clearer, more convenient, or more in line with programmers' programming habits.

For example, many programming languages ​​provide syntax for referencing and updating arrays;

Essentially, accessing array elements is the following process:

Provide an array and subscript vector, and then call the function

get_array(Array, vector(i, j))。

Instead, many programming languages ​​​​provide the following syntax to access array elements Array[i, j].

Similarly, updating array elements can be expressed as

set_array(Array, vetor(i, j), value)，

But many programming languages ​​provide the following syntax to update array elements

Array[i, j] := value。

Specifically, syntax sugar refers to the language A component of the language. When the component is removed, it does not affect the function and expression ability of the language. For example, the token a[i] in C language is the syntactic sugar of *(a i).

Popular explanation

It becomes sweeter when sugar is added, but the nature does not change, that is, the code function is the same before adding sugar and after adding sugar.

It tastes better after adding sugar, the code is smoother, and the understanding is more natural

Simply put, syntax sugar is a convenient way of writing.

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