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This article mainly explains "how to use typescript". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn how to use typescript.

Basic type

Strings, numbers, Boolean

Let name: string = 'little fairy'

Let age: number = 18

Let sex: boolean = false

Array

Let names: Array = ['little fairy', 'Ken']

Let ages: number [] = [18,20]

Let sexs: boolean [] = [false, true]

Let anys: any [] = ['1customers, 2, true]

Function parameter type, return value type

Function call (me: string | number | boolean): any {

Return me

}

Object Typ

Let obj: {x: number, y: number} = {x: 10, y: 100}

Optional attribute

/ / basic types

Let name: string = 'little fairy'

Let age: number = 18

Let sex: boolean = false

/ / array

Let names: Array = ['little fairy', 'Ken']

Let ages: number [] = [18,20]

Let sexs: boolean [] = [false, true]

/ / function

Function call (me: string | number | boolean): any {

Return me

}

/ / object type

Let obj: {x: number; y: number} = {x: 10, y: 100}

/ / optional attribute

Let person: {name: string; age: number; sex?: boolean} = {name, age}

Type Typ

/ / object type

Let obj: {x: number; y: number} = {x: 10, y: 100}

/ / optional attribute

Let person: {name: string; age: number; sex?: boolean} = {name, age}

/ / Type alias

Type Point = {

X: number

Y: number

}

Function printCoord (pt: Point): void {

Console.log (pt)

}

PrintCoord (obj)

Interface

/ / API

Interface Pt {

X: number

Y: number

}

Function printCoord1 (pt: Pt): void {

Console.log (pt)

}

PrintCoord1 (obj)

At this point, I believe you have a deeper understanding of "how to use typescript". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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