var car = \"Fiat\";<\/code><\/pre>\n\n\n\nC\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u0169ng l\u00e0 bi\u1ebfn, nh\u01b0ng \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 bao g\u1ed3m nhi\u1ec1u gi\u00e1 tr\u1ecb.<\/p>\n\n\n\n
\u0110o\u1ea1n code ti\u1ebfp theo g\u00e1n nhi\u1ec1u gi\u00e1 tr\u1ecb (Fiat, 500, white) cho bi\u1ebfn t\u00ean l\u00e0 car:<\/p>\n\n\n\n
var car = {type:\"Fiat\", model:\"500\", color:\"white\"};<\/code><\/pre>\n\n\n\nC\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng c\u1eb7p t\u00ean:gi\u00e1 tr\u1ecb <\/strong>(t\u00ean v\u00e0 gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch nhau b\u1eb1ng d\u1ea5u hai ch\u1ea5m).<\/p>\n\n\n\n \n\n\n\n<\/span>Thu\u1ed9c t\u00ednh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng<\/span><\/h2>\n\n\n\nC\u1eb7p t\u00ean:gi\u00e1 tr\u1ecb (trong \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a JavaScript) \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 thu\u1ed9c t\u00ednh.<\/p>\n\n\n\n
var person = {firstName:\"\u0110\u1ee9c Anh\", lastName:\"Nguy\u1ec5n\", age:30, eyeColor:\"black\"};<\/code><\/pre>\n\n\n\nThu\u1ed9c t\u00ednh<\/th> Gi\u00e1 tr\u1ecb c\u1ee7a thu\u1ed9c t\u00ednh<\/th><\/tr> firstName<\/td> \u0110\u1ee9c Anh<\/td><\/tr> lastName<\/td> Nguy\u1ec5n<\/td><\/tr> age<\/td> 30<\/td><\/tr> eyeColor<\/td> black<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n \n\n\n\n<\/span>Ph\u01b0\u01a1ng th\u1ee9c c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng<\/span><\/h2>\n\n\n\nC\u00e1c ph\u01b0\u01a1ng th\u1ee9c l\u00e0 c\u00e1c h\u00e0nh \u0111\u1ed9ng<\/strong> c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n\n\n\nC\u00e1c ph\u01b0\u01a1ng th\u1ee9c l\u01b0u tr\u1eef trong thu\u1ed9c t\u00ednh nh\u01b0 c\u00e1c \u0111\u1ecbnh ngh\u0129a h\u00e0m<\/strong>.<\/p>\n\n\n\nThu\u1ed9c t\u00ednh<\/th> Gi\u00e1 tr\u1ecb c\u1ee7a thu\u1ed9c t\u00ednh<\/th><\/tr> firstName<\/td> \u0110\u1ee9c Anh<\/td><\/tr> lastName<\/td> Nguy\u00ean<\/td><\/tr> age<\/td> 30<\/td><\/tr> eyeColor<\/td> black<\/td><\/tr> fullName<\/td> function() {return this.firstName + ” ” + this.lastName;}<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n \n\n\n\n<\/span>\u0110\u1ecbnh ngh\u0129a \u0111\u1ed1i t\u01b0\u1ee3ng<\/span><\/h2>\n\n\n\nB\u1ea1n \u0111\u1ecbnh ngh\u0129a (v\u00e0 t\u1ea1o) m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng trong JavaScript:<\/p>\n\n\n\n
V\u00ed d\u1ee5<\/h3>\n\n\n\nvar person = {firstName:\"\u0110\u1ee9c Anh\", lastName:\"Nguy\u1ec5n\", age:30, eyeColor:\"black\"};<\/code><\/pre>\n\n\n\nKho\u1ea3ng tr\u1ed1ng v\u00e0 c\u00e1c ph\u1ea7n xu\u1ed1ng d\u00f2ng kh\u00f4ng quan tr\u1ecdng. M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00e1ch ra th\u00e0nh nhi\u1ec1u d\u00f2ng:<\/p>\n\n\n\n
V\u00ed d\u1ee5<\/h3>\n\n\n\nvar person = {\n firstName:\"\u0110\u1ee9c Anh\",\n lastName:\"Nguy\u1ec5n\",\n age:30,\n eyeColor:\"black\"\n };<\/code><\/pre>\n\n\n\n \n\n\n\n<\/span>Truy c\u1eadp thu\u1ed9c t\u00ednh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng<\/span><\/h2>\n\n\n\nB\u1ea1n c\u00f3 th\u1ec3 truy c\u1eadp thu\u1ed9c t\u00ednh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng theo hai c\u00e1ch:<\/p>\n\n\n\n
TenDoiTuong.TenThuocTinh<\/code><\/pre>\n\n\n\nho\u1eb7c<\/p>\n\n\n\n
TenDoiTuong[\"TenThuocTinh\"]<\/code><\/pre>\n\n\n\nV\u00ed d\u1ee5 1<\/h3>\n\n\n\nperson.lastName;<\/code><\/pre>\n\n\n\nV\u00ed d\u1ee5 2<\/h3>\n\n\n\nperson[\"lastName\"];<\/code><\/pre>\n\n\n\n \n\n\n\n<\/span>Truy c\u1eadp ph\u01b0\u01a1ng th\u1ee9c \u0111\u1ed1i t\u01b0\u1ee3ng<\/span><\/h2>\n\n\n\nB\u1ea1n c\u00f3 th\u1ec3 truy c\u1eadp ph\u01b0\u01a1ng th\u1ee9c c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng v\u1edbi c\u00fa ph\u00e1p sau:<\/p>\n\n\n\n
objectName.methodName()\n\nTenDoiTuong.TenPhuongThuc()<\/code><\/pre>\n\n\n\nV\u00ed d\u1ee5<\/p>\n\n\n\n
name = person.fullName();<\/code><\/pre>\n\n\n\nN\u1ebfu b\u1ea1n truy c\u1eadp thu\u1ed9c t\u00ednh<\/strong> h\u1ecd t\u00ean \u0111\u1ea7y \u0111\u1ee7, kh\u00f4ng c\u00f3 (), n\u00f3 s\u1ebd tr\u1ea3 v\u1ec1 \u0111\u1ecbnh ngh\u0129a h\u00e0m:<\/p>\n\n\n\nV\u00ed d\u1ee5<\/h3>\n\n\n\nname = person.fullName;<\/code><\/pre>\n\n\n\n \n\n\n\n<\/span>Kh\u00f4ng khai bao c\u00e1c Chu\u1ed7i, S\u1ed1 v\u00e0 Boolean th\u00e0nh \u0110\u1ed1i t\u01b0\u1ee3ng<\/span><\/h2>\n\n\n\nKhi m\u1ed9t bi\u1ebfn JavaScript \u0111\u01b0\u1ee3c khai b\u00e1o v\u1edbi t\u1eeb kho\u00e1 “new”, bi\u1ebfn \u0111\u01b0\u1ee3c t\u1ea1o nh\u01b0 l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng:<\/p>\n\n\n\n
var x = new String();\/\/ Khai b\u00e1o x nh\u01b0 l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng String\n\nvar y = new Number();\/\/ Khai b\u00e1o y nh\u01b0 l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng S\u1ed1\n\nvar z = new Boolean();\/\/ Khai b\u00e1o z nh\u01b0 l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng Boolean<\/code><\/pre>\n\n\n\nTr\u00e1nh s\u1eed d\u1ee5ng Chu\u1ed7i, S\u1ed1, v\u00e0 Boolean nh\u01b0 \u0111\u1ed1i t\u01b0\u1ee3ng. Ch\u00fang s\u1ebd l\u00e0m ph\u1ee9c t\u1ea1p th\u00eam code v\u00e0 l\u00e0m ch\u1eadm t\u1ed1c \u0111\u1ed9 th\u1ef1c thi.<\/p>\n","protected":false},"excerpt":{"rendered":"
\u0110\u1ed1i t\u01b0\u1ee3ng, thu\u1ed9c t\u00ednh, ph\u01b0\u01a1ng th\u1ee9c trong \u0111\u1eddi s\u1ed1ng th\u1ef1c Ngo\u00e0i \u0111\u1eddi, \u00f4 t\u00f4 l\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng. M\u1ed9t chi\u1ebfc \u00f4 t\u00f4 c\u1ee5 th\u1ec3 s\u1ebd c\u00f3 c\u00e1c thu\u1ed9c t\u00ednh nh\u01b0 kh\u1ed1i l\u01b0\u1ee3ng, m\u00e0u s\u1eafc v\u00e0 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c nh\u01b0 kh\u1edfi \u0111\u1ed9ng v\u00e0 d\u1eebng l\u1ea1i: \u0110\u1ed1i t\u01b0\u1ee3ng C\u00e1c thu\u1ed9c t\u00ednh C\u00e1c ph\u01b0\u01a1ng th\u1ee9c car.name = Fiat …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[236],"tags":[],"yoast_head":"\n
\u0110\u1ed1i t\u01b0\u1ee3ng trong JavaScript • Ki\u1ebfn c\u00e0ng<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n","yoast_head_json":{"title":"\u0110\u1ed1i t\u01b0\u1ee3ng trong JavaScript • Ki\u1ebfn c\u00e0ng","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/kiencang.net\/doi-tuong-trong-javascript\/","og_locale":"vi_VN","og_type":"article","og_title":"\u0110\u1ed1i t\u01b0\u1ee3ng trong JavaScript • Ki\u1ebfn c\u00e0ng","og_description":"\u0110\u1ed1i t\u01b0\u1ee3ng, thu\u1ed9c t\u00ednh, ph\u01b0\u01a1ng th\u1ee9c trong \u0111\u1eddi s\u1ed1ng th\u1ef1c Ngo\u00e0i \u0111\u1eddi, \u00f4 t\u00f4 l\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng. M\u1ed9t chi\u1ebfc \u00f4 t\u00f4 c\u1ee5 th\u1ec3 s\u1ebd c\u00f3 c\u00e1c thu\u1ed9c t\u00ednh nh\u01b0 kh\u1ed1i l\u01b0\u1ee3ng, m\u00e0u s\u1eafc v\u00e0 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c nh\u01b0 kh\u1edfi \u0111\u1ed9ng v\u00e0 d\u1eebng l\u1ea1i: \u0110\u1ed1i t\u01b0\u1ee3ng C\u00e1c thu\u1ed9c t\u00ednh C\u00e1c ph\u01b0\u01a1ng th\u1ee9c car.name = Fiat …","og_url":"https:\/\/kiencang.net\/doi-tuong-trong-javascript\/","og_site_name":"Ki\u1ebfn c\u00e0ng","article_author":"https:\/\/www.facebook.com\/anhducnguyen87\/","article_published_time":"2016-07-05T04:29:56+00:00","og_image":[{"url":"https:\/\/kiencang.net\/wp-content\/uploads\/2016\/07\/doi_tuong_oto.gif"}],"author":"Nguy\u1ec5n \u0110\u1ee9c Anh","twitter_card":"summary_large_image","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"Nguy\u1ec5n \u0110\u1ee9c Anh","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"3 ph\u00fat"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/kiencang.net\/doi-tuong-trong-javascript\/","url":"https:\/\/kiencang.net\/doi-tuong-trong-javascript\/","name":"\u0110\u1ed1i t\u01b0\u1ee3ng trong JavaScript • Ki\u1ebfn c\u00e0ng","isPartOf":{"@id":"https:\/\/kiencang.net\/#website"},"datePublished":"2016-07-05T04:29:56+00:00","dateModified":"2016-07-05T04:29:56+00:00","author":{"@id":"https:\/\/kiencang.net\/#\/schema\/person\/5e7e1a04d8d1218ad8c421ba43d25c16"},"breadcrumb":{"@id":"https:\/\/kiencang.net\/doi-tuong-trong-javascript\/#breadcrumb"},"inLanguage":"vi","potentialAction":[{"@type":"ReadAction","target":["https:\/\/kiencang.net\/doi-tuong-trong-javascript\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/kiencang.net\/doi-tuong-trong-javascript\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/kiencang.net\/"},{"@type":"ListItem","position":2,"name":"\u0110\u1ed1i t\u01b0\u1ee3ng trong JavaScript"}]},{"@type":"WebSite","@id":"https:\/\/kiencang.net\/#website","url":"https:\/\/kiencang.net\/","name":"Ki\u1ebfn c\u00e0ng","description":"\u00d4m l\u00fd thuy\u1ebft, h\u00f4n th\u1ef1c h\u00e0nh","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/kiencang.net\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"vi"},{"@type":"Person","@id":"https:\/\/kiencang.net\/#\/schema\/person\/5e7e1a04d8d1218ad8c421ba43d25c16","name":"Nguy\u1ec5n \u0110\u1ee9c Anh","image":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/kiencang.net\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/6d71f9b89393952a8382e30dad26c1ec?s=96&d=monsterid&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/6d71f9b89393952a8382e30dad26c1ec?s=96&d=monsterid&r=g","caption":"Nguy\u1ec5n \u0110\u1ee9c Anh"},"description":"Sinh n\u0103m 1987, t\u1ed1t nghi\u1ec7p Cao \u0111\u1eb3ng th\u1ef1c h\u00e0nh FPT qu\u00e3ng 2014, chuy\u00ean ng\u00e0nh Thi\u1ebft k\u1ebf website. 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