TypeScript 学习笔记

安装: 

npm install -g typescript

运行:

tsc  helloworld.ts  ----------生成相应的helloworld.js文件

gulp构建ts项目:

1、mkdir gulpTsApp

2、cd gulpTsApp

3、mkdir src

4、mkdir dist

5、npm init

6、npm install -g gulp-cli

7、npm install --save-dev typescript gulp gulp-typescript 

HELLOWORLD:

1.src下面新建helloworld.ts文件:

function hello(compiler:string){

console.log(`Hellofrom${compiler}`);

}

hello("TypeScript");

2、在工程的根目录proj下新建一个tsconfig.json文件:

 "files": [ 

 "src/helloworld.ts" 

 ],

 "compilerOptions": { 

         "noImplicitAny": true, 

          "target": "es5" 

     }

}

3、在工程根目录下,新建一个gulpfile.js文件:

vargulp=require("gulp");

var ts=require("gulp-typescript");

var tsProject=ts.createProject("tsconfig.json");

gulp.task("default",function(){

    returnts Project.src()

        .pipe( tsProject())

        .js.pipe(gulp.dest("dist"));

});

4、运行helloworld:

gulp

node dist/main.js

Browserify:

1、npm install --save-dev browserify tsify vinyl-source-stream

2、新建index.html页面:

    

        

        Hello World!

    

    

        

Loading ...

        

    

3、新建main.ts文件:

import{sayHello}from"./greet";

function showHello(divName:string,name:string){

    const elt=document.getElementById(divName);

    elt.innerText=sayHello(name);

}

showHello("greeting","TypeScript");

4、新建gulpfile.js文件:

var gulp=require("gulp");

var browserify=require("browserify");

var source=require('vinyl-source-stream');

var tsify=require("tsify");

var paths={ 

    pages:['src/*.html']

};

gulp.task("copy-html",function(){

    return gulp.src(paths.pages)

    .pipe(gulp.dest("dist"));

});

gulp.task("default",["copy-html"],function(){

    return browserify({

        basedir:'.',

        debug:true,

        entries:['src/main.ts'],

        cache:{},

        packageCache:{}

})

.plugin(tsify)

.bundle()

.pipe(source('bundle.js'))

.pipe(gulp.dest("dist"));

});

5、运行:gulp ,之后打开index.html页面即可

Watchify、Bable、Uglify运用:

1、安装watchify:

npm install --save-dev watchify gulp-util

2、安装uglify及其他相关插件:

npm install --save-dev gulp-uglify vinyl-buffer gulp-sourcemaps

3、安装Babel以及其他相关插件:

npm install --save-dev babelify babel-preset-es2015 vinyl-buffer gulp-sourcemaps

4、修改gulpfile.js文件:

var gulp=require('gulp');

var browserify=require('browserify');

var source=require('vinyl-source-stream');

var tsify=require('tsify');

var sourcemaps=require('gulp-sourcemaps');

var buffer=require('vinyl-buffer');

var paths={pages:['src/*.html']};

gulp.task('copyHtml',function(){

return gulp.src(paths.pages).pipe(gulp.dest('dist'));

}); 

gulp.task('default',['copyHtml'],function(){

    return browserify({

        basedir:'.',

        debug:true,

        entries:['src/main.ts'],

        cache:{},

        packageCache:{}

})

 .plugin(tsify)

.transform('babelify',{presets:['es2015'],extensions:['.ts']})

.bundle()

.pipe(source('bundle.js'))

.pipe(buffer())

.pipe(sourcemaps.init({loadMaps:true}))

.pipe(sourcemaps.write('./'))

.pipe(gulp.dest('dist'));

});

5、修改tsconfig.js:

 "files": [ "src/main.ts" ], 

 "compilerOptions": { 

     "noImplicitAny": true,

     "target": "es2015" }

}


将react、webpack、typescript结合使用:

1、mkdir reactTypescriptApp --> cd reactTypescriptApp --> mkdir src --> cd src --> mkdir components --> npm init

2、npm install -g webpack

3、npm install --save react react-dom @types/react @types/react-dom

4、npm install --save-dev typescript awesome-typescript-loadersource-map-loader

5、创建tsconfig.json文件:

{

 "compilerOptions":{     

     "outDir": "./dist/", 

         "sourceMap": true, 

         "noImplicitAny": true,

         "module": "commonjs", 

         "target": "es5", 

         "jsx": "react" 

     }, 

     "include": [ "./src/**/*" ]

}

6、创建hello.tsx文件:

import * as React from"react";

export interface HelloProps{

        compiler:string;

        framework:string;

}

export const Hello=(props:HelloProps)=>

Hellofrom{props.compiler}and{props.framework}!

;

7、创建index.tsx:

import * as React from "react";

import * as ReactDOM from "react-dom";

import{ Hello }from"./components/Hello";

ReactDOM.render(

,

document.getElementById("example"));

8、创建index.html:

    

        

        Hello React!

        

       

        

        

        

9、创建webpack.config.js

10、执行  webpack




知识点正文:

一、基础类型:

布尔、数字、字符串、数组、元祖、枚举、任意值、空值、null和undefined、never、类型断言

let isDone:boolean=false;

let decLiteral:number=6;

let name:string="bob";

let name:string=`Gene`;

let age:number=37;

let sentence:string=`Hello,my name is${name}

let list:number[]=[1,2,3];

元组类型允许表示一个已知元素数量和类型的数组:

let x:[string,number];

x=['hello',10];//ok

x=[10,'hello'];// Error

enum Color{Red,Green,Blue}

let c:Color=Color.Green;

enum Color{Red=1,Green,Blue}

let colorName:string=Color[2];

let notSure:any=4;

notSure="maybe a string instead";

notSure=false;// okay, definitely a boolean

let list:any[]=[1,true,"free"];

function warnUser():void{

    alert("This is my warning message");

}

let u:undefined=undefined;

let n:null=null;

二、变量声明

var a=10;

for(vari=0;i<10;i++){

    setTimeout(function(){ console.log(i); },100*i);

}

for(var i=0;i<10;i++){

    // capture the current state of 'i'// by invoking a function with its current value

(function(i){

    setTimeout( function(){ console.log(i); },100*i );

})(i);

}

function sumMatrix(matrix:number[][]){

    let sum=0;

    for(leti=0;i

        var currentRow=matrix[i];

        for(leti=0;i

            sum+=currentRow[i];

        }

    }

    return sum;

}

for(let i=0;i<10;i++){

    setTimeout(function(){

        console.log(i);

    },100*i);

}

数组结构:

let input=[1,2];

let[first,second]=input;

[first,second]=[second,first];

function f([first,second]:[number,number]){

    console.log(first);console.log(second);

}

let [first,...rest]=[1,2,3,4];

let [first]=[1,2,3,4];

let [,second,,fourth]=[1,2,3,4];

let o={a:"foo",b:12,c:"bar"};let {a,b} =o;

({a,b}={a:"baz",b:101});

let {a,...passthrough}=o;

let total=passthrough.b+passthrough.c.length;

let {a:newName1,b:newName2}=o;

let {a,b}:{a:string,b:number}=o;

let {a: otherName1,b:otherName2}: {a:string,b: number} = o

function keepWholeObject(wholeObject:{a:string,b?:number}){

    let {a,b=1001}=wholeObject;

}

type C={a:string,b?:number}

function f({a,b=1}:C):void{// ...}

function f({a,b}={a:"",b:0}):void{// ...}

let first=[1,2];let second=[3,4];let bothPlus=[0,...first,...second,5];

let defaults={food:"spicy",price:"$$",ambiance:"noisy"};

let search={...defaults,food:"rich"};

class C{

    p=12;

    m(){}

}

let c=newC();

let clone={...c};

clone.p;// ok

clone.m();// error!

三、接口

interface SquareConfig{

    color?:string;

    width?:number;

}

function createSquare(config:SquareConfig):{color:string;area:number}{

let newSquare={color:"white",area:100};

if(config.color){

    // Error: Property 'clor' does not exist on type 'SquareConfig'

    newSquare.color=config.clor;}

if(config.width){

    newSquare.area=config.width*config.width;

}

return newSquare;

}

let mySquare=createSquare({color:"black"});

interface Point{

    readonly x:number;

    readonly y:number;

}

let p1:Point={x:10,y:20};

p1.x=5;// error!

let a:number[]=[1,2,3,4];

let ro:ReadonlyArray=a;

ro[0]=12;// error!

ro.push(5);// error!

ro.length=100;// error!

a=ro;// error!

interface SquareConfig{

    color?:string;

    width?:number;

    [propName:string]:any;

}

interface SearchFunc{

    (source:string,subString:string):boolean;

}

let mySearch:SearchFunc;

mySearch=function(source:string,subString:string){

    let result=source.search(subString);return result>-1;

}

四、类

五、函数

六、泛型

七、枚举

八、类型推论

九、类型兼容性

十、高级类型

十一、symbols

十二、Iterators 和 Generators

十三、模块和命名空间

十四、声明合并

十五、其他(JSX、Decorators、混入、三斜线指令、类型检查)

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