{"id":339,"date":"2020-04-04T11:19:54","date_gmt":"2020-04-04T04:19:54","guid":{"rendered":"https:\/\/thietkewebdalat.net\/blog\/?p=339"},"modified":"2020-04-04T11:19:54","modified_gmt":"2020-04-04T04:19:54","slug":"javascript-la-gi","status":"publish","type":"post","link":"https:\/\/thietkewebdalat.net\/blog\/javascript-la-gi\/","title":{"rendered":"JAVASCRIPT L\u00c0 G\u00cc? \u01afU V\u00c0 NH\u01af\u1ee2C \u0110I\u1ec2M C\u1ee6A JAVASCRIPT"},"content":{"rendered":"<h2>JavaScript l\u00e0 g\u00ec?<\/h2>\n<p>JavaScript l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh m\u00e1y t\u00ednh n\u0103ng \u0111\u1ed9ng. N\u00f3 r\u1ea5t nh\u1eb9 v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a c\u00e1c trang web, vi\u1ec7c tri\u1ec3n khai cho ph\u00e9p t\u1eadp l\u1ec7nh ph\u00eda m\u00e1y kh\u00e1ch t\u01b0\u01a1ng t\u00e1c v\u1edbi ng\u01b0\u1eddi d\u00f9ng v\u00e0 t\u1ea1o c\u00e1c trang \u0111\u1ed9ng. N\u00f3 l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch v\u1edbi kh\u1ea3 n\u0103ng h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n<figure id=\"attachment_341\" aria-describedby=\"caption-attachment-341\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-341\" src=\"https:\/\/thietkewebdalat.net\/blog\/wp-content\/uploads\/2020\/04\/js.png\" alt=\"JavaScript l\u00e0 g\u00ec?\" width=\"600\" height=\"455\" srcset=\"https:\/\/thietkewebdalat.net\/blog\/wp-content\/uploads\/2020\/04\/js.png 600w, https:\/\/thietkewebdalat.net\/blog\/wp-content\/uploads\/2020\/04\/js-300x228.png 300w, https:\/\/thietkewebdalat.net\/blog\/wp-content\/uploads\/2020\/04\/js-80x60.png 80w, https:\/\/thietkewebdalat.net\/blog\/wp-content\/uploads\/2020\/04\/js-554x420.png 554w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><figcaption id=\"caption-attachment-341\" class=\"wp-caption-text\">JavaScript l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p>Js l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 LiveScript, nh\u01b0ng Netscape \u0111\u00e3 \u0111\u1ed5i t\u00ean th\u00e0nh JavaScript, c\u00f3 th\u1ec3 l\u00e0 do c\u00f3 ngu\u1ed3n c\u1ea3m h\u1ee9ng \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi Java. JavaScript xu\u1ea5t hi\u1ec7n l\u1ea7n \u0111\u1ea7u ti\u00ean trong Netscape 2.0 v\u00e0o n\u0103m 1995 v\u1edbi t\u00ean LiveScript . L\u00f5i \u0111a n\u0103ng c\u1ee7a ng\u00f4n ng\u1eef \u0111\u00e3 \u0111\u01b0\u1ee3c nh\u00fang trong Netscape, Internet Explorer v\u00e0 c\u00e1c tr\u00ecnh duy\u1ec7t web kh\u00e1c.<\/p>\n<p>\u0110\u1eb7c t\u1ea3 ECMA-262 \u0111\u00e3 x\u00e1c \u0111\u1ecbnh phi\u00ean b\u1ea3n chu\u1ea9n c\u1ee7a ng\u00f4n ng\u1eef JavaScript c\u1ed1t l\u00f5i.<\/p>\n<ul>\n<li>JavaScript l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh nh\u1eb9, d\u1ec5 tr\u00ecnh b\u00e0y.<\/li>\n<li>\u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ea1o c\u00e1c \u1ee9ng d\u1ee5ng t\u1eadp trung v\u00e0o m\u1ea1ng.<\/li>\n<li>B\u1ed5 sung v\u00e0 t\u00edch h\u1ee3p v\u1edbi Java.<\/li>\n<li>B\u1ed5 sung v\u00e0 t\u00edch h\u1ee3p v\u1edbi HTML.<\/li>\n<li>M\u1edf v\u00e0 \u0111a n\u1ec1n t\u1ea3ng<\/li>\n<\/ul>\n<h2>JavaScript ph\u00eda m\u00e1y &#8211; kh\u00e1ch<\/h2>\n<p>Js ph\u00eda m\u00e1y &#8211; kh\u00e1ch l\u00e0 h\u00ecnh th\u1ee9c ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ee7a ng\u00f4n ng\u1eef. T\u1eadp l\u1ec7nh n\u00ean \u0111\u01b0\u1ee3c bao g\u1ed3m trong ho\u1eb7c \u0111\u01b0\u1ee3c tham chi\u1ebfu b\u1edfi m\u1ed9t t\u00e0i li\u1ec7u HTML \u0111\u1ec3 m\u00e3 \u0111\u01b0\u1ee3c tr\u00ecnh duy\u1ec7t di\u1ec5n gi\u1ea3i.<\/p>\n<p>\u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t trang web kh\u00f4ng c\u1ea7n ph\u1ea3i l\u00e0 HTML t\u0129nh, nh\u01b0ng c\u00f3 th\u1ec3 bao g\u1ed3m c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng t\u00e1c v\u1edbi ng\u01b0\u1eddi d\u00f9ng, ki\u1ec3m so\u00e1t tr\u00ecnh duy\u1ec7t v\u00e0 t\u1ef1 \u0111\u1ed9ng t\u1ea1o n\u1ed9i dung HTML.<\/p>\n<p>C\u01a1 ch\u1ebf ph\u00eda m\u00e1y kh\u00e1ch Js cung c\u1ea5p nhi\u1ec1u l\u1ee3i th\u1ebf so v\u1edbi c\u00e1c t\u1eadp l\u1ec7nh ph\u00eda m\u00e1y ch\u1ee7 CGI truy\u1ec1n th\u1ed1ng. V\u00ed d\u1ee5: b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng JavaScript \u0111\u1ec3 ki\u1ec3m tra xem ng\u01b0\u1eddi d\u00f9ng \u0111\u00e3 nh\u1eadp \u0111\u1ecba ch\u1ec9 email h\u1ee3p l\u1ec7 trong tr\u01b0\u1eddng bi\u1ec3u m\u1eabu ch\u01b0a.<\/p>\n<p>M\u00e3 JavaScript \u0111\u01b0\u1ee3c th\u1ef1c thi khi ng\u01b0\u1eddi d\u00f9ng g\u1eedi bi\u1ec3u m\u1eabu v\u00e0 ch\u1ec9 khi t\u1ea5t c\u1ea3 c\u00e1c m\u1ee5c nh\u1eadp h\u1ee3p l\u1ec7, ch\u00fang s\u1ebd \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn M\u00e1y ch\u1ee7 Web.<\/p>\n<p>JavaScript c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1eaby c\u00e1c s\u1ef1 ki\u1ec7n do ng\u01b0\u1eddi d\u00f9ng kh\u1edfi t\u1ea1o, ch\u1eb3ng h\u1ea1n nh\u01b0 nh\u1ea5p v\u00e0o n\u00fat, \u0111i\u1ec1u h\u01b0\u1edbng li\u00ean k\u1ebft v\u00e0 c\u00e1c h\u00e0nh \u0111\u1ed9ng kh\u00e1c m\u00e0 ng\u01b0\u1eddi d\u00f9ng b\u1eaft \u0111\u1ea7u r\u00f5 r\u00e0ng ho\u1eb7c ng\u1ea7m \u0111\u1ecbnh.<\/p>\n<h2>\u01afu \u0111i\u1ec3m c\u1ee7a JavaScript<\/h2>\n<p>\u01afu \u0111i\u1ec3m c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng JavaScript l\u00e0:<\/p>\n<p>\u00cdt t\u01b0\u01a1ng t\u00e1c v\u1edbi m\u00e1y ch\u1ee7 &#8211; B\u1ea1n c\u00f3 th\u1ec3 x\u00e1c th\u1ef1c \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng tr\u01b0\u1edbc khi g\u1eedi trang \u0111\u1ebfn m\u00e1y ch\u1ee7. \u0110i\u1ec1u n\u00e0y gi\u00fap ti\u1ebft ki\u1ec7m l\u01b0u l\u01b0\u1ee3ng m\u00e1y ch\u1ee7, c\u00f3 ngh\u0129a l\u00e0 t\u1ea3i \u00edt h\u01a1n tr\u00ean m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n.<\/p>\n<p>Ph\u1ea3n h\u1ed3i ngay l\u1eadp t\u1ee9c cho kh\u00e1ch truy c\u1eadp &#8211; H\u1ecd kh\u00f4ng ph\u1ea3i \u0111\u1ee3i t\u1ea3i l\u1ea1i trang \u0111\u1ec3 xem h\u1ecd c\u00f3 qu\u00ean nh\u1eadp n\u1ed9i dung n\u00e0o kh\u00f4ng.<\/p>\n<p>T\u0103ng t\u00ednh t\u01b0\u01a1ng t\u00e1c &#8211; B\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o c\u00e1c giao di\u1ec7n ph\u1ea3n \u1ee9ng khi ng\u01b0\u1eddi d\u00f9ng di chu\u1ed9t qua ch\u00fang ho\u1eb7c k\u00edch ho\u1ea1t ch\u00fang th\u00f4ng qua b\u00e0n ph\u00edm.<\/p>\n<p>Giao di\u1ec7n phong ph\u00fa h\u01a1n &#8211; B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng JavaScript \u0111\u1ec3 bao g\u1ed3m c\u00e1c m\u1ee5c nh\u01b0 c\u00e1c th\u00e0nh ph\u1ea7n k\u00e9o v\u00e0 th\u1ea3 \u0111\u1ec3 tr\u01b0\u1ee3t Giao di\u1ec7n phong ph\u00fa cho kh\u00e1ch truy c\u1eadp trang web c\u1ee7a b\u1ea1n.<\/p>\n<h2>H\u1ea1n ch\u1ebf c\u1ee7a JavaScript<\/h2>\n<p>Ch\u00fang t\u00f4i kh\u00f4ng th\u1ec3 coi JavaScript l\u00e0 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh ch\u00ednh th\u1ee9c. N\u00f3 thi\u1ebfu c\u00e1c t\u00ednh n\u0103ng quan tr\u1ecdng sau:<\/p>\n<p>Js ph\u00eda m\u00e1y kh\u00e1ch kh\u00f4ng cho ph\u00e9p \u0111\u1ecdc ho\u1eb7c ghi t\u1ec7p. \u0110i\u1ec1u n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1eef v\u00ec l\u00fd do an ninh.<\/p>\n<p>Js kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c \u1ee9ng d\u1ee5ng m\u1ea1ng v\u00ec kh\u00f4ng c\u00f3 h\u1ed7 tr\u1ee3 nh\u01b0 v\u1eady.<\/p>\n<p>Js kh\u00f4ng c\u00f3 b\u1ea5t k\u1ef3 kh\u1ea3 n\u0103ng \u0111a lu\u1ed3ng ho\u1eb7c \u0111a x\u1eed l\u00fd n\u00e0o.<\/p>\n<p>M\u1ed9t l\u1ea7n n\u1eefa, Js l\u00e0 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh nh\u1eb9, \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch cho ph\u00e9p b\u1ea1n x\u00e2y d\u1ef1ng t\u00ednh t\u01b0\u01a1ng t\u00e1c v\u00e0o c\u00e1c trang HTML t\u0129nh.<\/p>\n<h2>C\u00f4ng c\u1ee5 ph\u00e1t tri\u1ec3n Js<\/h2>\n<p>M\u1ed9t trong nh\u1eefng th\u1ebf m\u1ea1nh ch\u00ednh c\u1ee7a JavaScript l\u00e0 n\u00f3 kh\u00f4ng y\u00eau c\u1ea7u c\u00e1c c\u00f4ng c\u1ee5 ph\u00e1t tri\u1ec3n \u0111\u1eaft ti\u1ec1n. B\u1ea1n c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u v\u1edbi m\u1ed9t tr\u00ecnh so\u1ea1n th\u1ea3o v\u0103n b\u1ea3n \u0111\u01a1n gi\u1ea3n nh\u01b0 Notepad. V\u00ec n\u00f3 l\u00e0 ng\u00f4n ng\u1eef \u0111\u01b0\u1ee3c d\u1ecbch trong ng\u1eef c\u1ea3nh c\u1ee7a tr\u00ecnh duy\u1ec7t web. B\u1ea1n th\u1eadm ch\u00ed kh\u00f4ng c\u1ea7n mua tr\u00ecnh bi\u00ean d\u1ecbch.<\/p>\n<p>\u0110\u1ec3 l\u00e0m cho cu\u1ed9c s\u1ed1ng c\u1ee7a ch\u00fang t\u00f4i \u0111\u01a1n gi\u1ea3n h\u01a1n. C\u00e1c nh\u00e0 cung c\u1ea5p kh\u00e1c nhau \u0111\u00e3 \u0111\u01b0a ra c\u00e1c c\u00f4ng c\u1ee5 ch\u1ec9nh s\u1eeda Js r\u1ea5t hay. M\u1ed9t s\u1ed1 trong s\u1ed1 h\u1ecd \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea \u1edf \u0111\u00e2y:<\/p>\n<p>Microsoft FrontPage &#8211; Microsoft \u0111\u00e3 ph\u00e1t tri\u1ec3n m\u1ed9t tr\u00ecnh so\u1ea1n th\u1ea3o HTML ph\u1ed5 bi\u1ebfn c\u00f3 t\u00ean FrontPage. FrontPage c\u0169ng cung c\u1ea5p cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n web m\u1ed9t s\u1ed1 c\u00f4ng c\u1ee5 JavaScript \u0111\u1ec3 h\u1ed7 tr\u1ee3 t\u1ea1o c\u00e1c trang web t\u01b0\u01a1ng t\u00e1c.<\/p>\n<p>Macromedia Dreamweaver MX &#8211; Macromedia Dreamweaver MX l\u00e0 tr\u00ecnh so\u1ea1n th\u1ea3o HTML v\u00e0 JavaScript r\u1ea5t ph\u1ed5 bi\u1ebfn trong \u0111\u00e1m \u0111\u00f4ng ph\u00e1t tri\u1ec3n web chuy\u00ean nghi\u1ec7p. N\u00f3 cung c\u1ea5p m\u1ed9t s\u1ed1 th\u00e0nh ph\u1ea7n JavaScript d\u1ef1ng s\u1eb5n ti\u1ec7n d\u1ee5ng. T\u00edch h\u1ee3p t\u1ed1t v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n m\u1edbi nh\u01b0 XHTML v\u00e0 XML.<\/p>\n<p>Macromedia HomeSite 5 &#8211; HomeSite 5 l\u00e0 tr\u00ecnh so\u1ea1n th\u1ea3o HTML v\u00e0 JavaScript r\u1ea5t th\u00edch. T\u1eeb Macromedia c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 qu\u1ea3n l\u00fd c\u00e1c trang web c\u00e1 nh\u00e2n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<p>B\u00e0i vi\u1ebft kh\u00e1c:<\/p>\n<p><span style=\"background-color: #ffffff; color: #0000ff;\"><a style=\"background-color: #ffffff; color: #0000ff;\" href=\"https:\/\/thietkewebdalat.net\/blog\/bai-1-chuong-trinh-dau-tien-node-js\/\">B\u00e0i 1: Ch\u01b0\u01a1ng tr\u00ecnh \u0111\u1ea7u ti\u00ean node js<\/a><\/span><\/p>\n<p><span style=\"background-color: #ffffff; color: #0000ff;\"><a style=\"background-color: #ffffff; color: #0000ff;\" href=\"https:\/\/thietkewebdalat.net\/blog\/bai-2-components-cua-angular-js-8\/\">[B\u00e0i 2] Components c\u1ee7a Angular js 8<\/a><\/span><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript l\u00e0 g\u00ec? JavaScript l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh m\u00e1y t\u00ednh n\u0103ng \u0111\u1ed9ng. N\u00f3 r\u1ea5t nh\u1eb9 v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a c\u00e1c trang web, vi\u1ec7c tri\u1ec3n khai cho ph\u00e9p t\u1eadp l\u1ec7nh ph\u00eda m\u00e1y kh\u00e1ch t\u01b0\u01a1ng t\u00e1c v\u1edbi ng\u01b0\u1eddi d\u00f9ng v\u00e0 t\u1ea1o c\u00e1c trang \u0111\u1ed9ng. N\u00f3 l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":340,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"amp_status":"","footnotes":""},"categories":[17,14],"tags":[125,123,124,126,127],"class_list":{"0":"post-339","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-js","8":"category-html-css-js","9":"tag-hoc-javascript-co-ban","10":"tag-javascript","11":"tag-javascript-la-gi","12":"tag-khoa-hoc-javascript-cho-nguoi-bat-dau-hoc","13":"tag-uu-va-nhuoc-diem-cua-javascript"},"_links":{"self":[{"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/posts\/339","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/comments?post=339"}],"version-history":[{"count":1,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/posts\/339\/revisions"}],"predecessor-version":[{"id":342,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/posts\/339\/revisions\/342"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/media\/340"}],"wp:attachment":[{"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/media?parent=339"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/categories?post=339"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/tags?post=339"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}