Angular 4 là gì? Tìm hiểu từ A đến Z về Angular 4

Angular 4 l g? Angular 4 mang li nhng iu vt tri g cho ng dng ca bn? S khc bit gia angular 4 vi angular 2 nh no? Bi vit ny hy cng Baiviethay.com tm hiu v thut ng Angular 4 l g v hnh trang cn thit cho ngi mi bt u nh.

Tm hiu Angular 4 l g?

Trc tin, chng ta s cng nhau gii quyt cu hi Angular 4 l g. Angular l ng dng cc tp hp gm component (thnh phn) v services (dich vu) c cung cp chc nng trn nn tng component. hiu r hn v Angular 4 l g, bn c th tham kho qua cng thc di y:

Angular Application = Component + Component + Component + + services

Component = Class + Template + Metadata

Trong , mi mt component bao gm mu HTML ring. y l m c dng frame giao din ngui dng.

View c thit lp trn Class vi code. Khi , class c cc thuc tnh v phn t d liu c lp trnh sn nhm phuc vu cc phng thc v lng view. Chng hn nh thit lp s phn hi ca ngi c bng mt nt bm.

Bn cnh , component cn bao gm Metadata. N cung cp cho ngi dng thm cc thng tin cua component cho Angular. Cc Metadata c vai tr xc inh Class l mt Angular component.

Nhn mt cch khi qut Angular 4 l g? Mt component c hnh thnh t view c mu HTML, code c b sung v nh ngha vi Class, c xc nh bi Metadata.

Vy Angular 4 l g v n c kh nng nh th no? Angular modules c tc dng h tr t chc cc ng dng Angular thnh mt khi tng th gn kt cc chc nng vi nhau. Trong , mi mt ng dng Angular c ti thiu 1 module Root Angular Module. i vi nhng ng dng thc t th c th c nhiu module.

Hnh trang cn thit v Angular 4 cho ngi mi bt u

Khi bit Angular 4 l g, chng ta s bt u bt u tm hiu n code. Code c bt u bng cc dng lnh Angular.

iu u tin cn chun b l Angular 4 l g, cng c, editor ph hp v framework, cc gi ng dng m rng. iu ny s h tr cho cng vic lp trnh c thun li v d dng.

xy dng Angular, ngi dng cn s dng ngn ng lp trnh TypeScript. TypeScript c nhng th mnh nht nh nh strongly-typed. N l tc dng lm vic vi Javascript, khai bo di dng t kha var. Chnh nh li th ny m TypeScript c nhiu ng dng hp dn nh kim tra c php. gip code tr nn r rng, iu hng code

Hin nay, nhiu Editor c y cc h tr cho lp trnh TypeScript. Bn nn chn nhng Editor h tr TypeScript ph hp vi cc chc nng h tr tt nht cho nhu cu ca mnh.

Trong cc ng dng Editor h tr TypeScript hin nay, Visual Studio Code (VCS) l ng dng c s dng ph bin v c nhiu ngi s dng. VCS c th chy c trn nhiu nn tng nh MacOS, Linux, Windows vi nhng tnh nng tuyt vi. Cc tnh nng hp dn m VCS mang n cho ngi dng phi k n IntelliSense, refactorings, auto completion, Syntax checking

Ngi dng c nhu cu s dng c th thy cc phin bn Visual Studio Code (VCS) trn cc din n, website ti min ph. C rt nhiu phin bn VCS khc nhau, v vy bn c th chn ci ph hp vi h iu hnh, v i my mnh s dng.

Gii thiu Editor ph hp cho Angular

Khi nm r Angular 4 l g, bn c th chn c loi Editor ph hp. Cng vic tip theo chnh l thit lp mi trng xy dng code.

thit lp v pht trin mi trng code cho Angular 4 cn 2 bc c bn:

• Ci t NPM / Node Package Manager
• Thit lp ng dng Angular 4 bng Angular CLI

Vy Angular 4 l g, NPM l g? Npm c tn gi y l Node Package Manager. y l cng c dng qun l cc gi th vin JavaScript opensource bng Command Line.

Ki s dng Node Package Manager ngi dng c h tr chc nng th vin, gi, ng dng, dependency Bn c th s dng NPM ci t mi loi th vin m Angular cung cp. Tht tuyt vi phi khng no?

ng lo lng nu nh my tnh ca bn cha h tr NPM. Bi bn c th d dng ti ng dng ny qua ng link https://www.npmjs.com/. y l website chnh thc h tr v cung cp Node Package Manager, bn c th s dng bn dng th hoc bn tr ph ty theo nhu cu.

Gi y bn ch cn chn h iu hnh v ti v my, ci t. Sau khi qu trnh ci t hon tt, ngi dng dng lnh NPM v kim tra phin bn bn ci t l bao nhiu v c th nng cp ln bn cao hn ty thch.

thit lp Angular 4 l g v cn lm nh th no? Ch cn ci t ng dng h tr Angular CLI v thc hin mt s thao tc, cu lnh n gin l hon tt.

• Khi hon tt ci t Angular CLI, ngi dng m terminal v thc hin dng lnh: npm install [emailprotected]/cli
• Kim tra Angular CLI bng cch thc hin dng lnh ng -v. Trn mn hnh s hin th phin bn c ci t v thng tin ca ng dng.
• thit lp ci t ng dng Angular, ngi dng c th s dng dng lnh ng new -tn ng dng. bt u chy cc mu ch cn chy lnh ng serve l bt u vo trnh x l.
• Cui cng, ngi dng ch cn thc hin ci extentions h tr theo nhu cu trong qu trnh lp trnh Angular.

Vy Angular l g v c nhng extentions h tr ph bin no? Baiviethay.com s gii thiu ti bn nhng ng dng tin dng:

• TSLint
• Angular2-inline
• Angular 5 TypeScript Snippet
• Auto Import

Gi th nhng thc mc v Angular 4 l g v cch thit lp, ci t dnh cho ngi ngi mi ca bn c gii p ri phi khng no? hiu r hn v Angular 4 l g v nhng b quyt khc hy n c cc bi vit tip theo ca Baiviethay.com nh.

Theo Baiviethay.com