{"id":30086,"date":"2024-04-19T10:03:02","date_gmt":"2024-04-19T10:03:02","guid":{"rendered":"https:\/\/onlineexammaker.com\/kb\/?p=30086"},"modified":"2024-04-27T07:19:35","modified_gmt":"2024-04-27T07:19:35","slug":"how-to-create-a-quiz-in-javascript-20","status":"publish","type":"post","link":"https:\/\/onlineexammaker.com\/kb\/vi\/how-to-create-a-quiz-in-javascript-20\/","title":{"rendered":"C\u00e1ch t\u1ea1o c\u00e2u \u0111\u1ed1 trong Javascript"},"content":{"rendered":"<p> Vi\u1ec7c t\u1ea1o b\u00e0i ki\u1ec3m tra b\u1eb1ng JavaScript mang l\u1ea1i m\u1ed9t s\u1ed1 l\u1ee3i \u00edch v\u00e0 c\u01a1 h\u1ed9i \u0111\u1ec3 t\u00f9y ch\u1ec9nh v\u00e0 t\u01b0\u01a1ng t\u00e1c.<\/p>\n<div class=\"article_toc\"> M\u1ee5c l\u1ee5c<\/div>\n<ul class=\"article_index\">\n<li><a href=\"#a1\">C\u00e2u \u0111\u1ed1 trong JavaScript l\u00e0 g\u00ec?<\/a><\/li>\n<li> <a href=\"#a2\">L\u1ee3i \u00edch c\u1ee7a vi\u1ec7c t\u1ea1o c\u00e2u \u0111\u1ed1 b\u1eb1ng JavaScrip<\/a><\/li>\n<li> <a href=\"#a3\">H\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc: C\u00e1ch t\u1ea1o c\u00e2u \u0111\u1ed1 trong Javascript<\/a><\/li>\n<li> <a href=\"#a4\">Gi\u1ea3i ph\u00e1p thay th\u1ebf: T\u1ea1o b\u00e0i ki\u1ec3m tra t\u01b0\u01a1ng t\u00e1c b\u1eb1ng OnlineExamMaker<\/a><\/li>\n<li> <a href=\"#a5\">M\u1eb9o \u0111\u1ec3 t\u1ea1o c\u00e2u \u0111\u1ed1 trong JavaScript<\/a><\/li>\n<li> <a href=\"#a6\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 T\u1ea1o c\u00e2u \u0111\u1ed1 trong JavaScript<\/a><\/li>\n<\/ul>\n<h3 id=\"a1\">C\u00e2u \u0111\u1ed1 trong JavaScript l\u00e0 g\u00ec?<\/h3>\n<p> Trong JavaScript, b\u00e0i ki\u1ec3m tra th\u01b0\u1eddng l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng web ho\u1eb7c m\u1ed9t ph\u1ea7n c\u1ee7a trang web tr\u00ecnh b\u00e0y m\u1ed9t lo\u1ea1t c\u00e2u h\u1ecfi cho ng\u01b0\u1eddi d\u00f9ng v\u00e0 \u0111\u00e1nh gi\u00e1 c\u00e2u tr\u1ea3 l\u1eddi c\u1ee7a h\u1ecd. \u0110\u00f3 l\u00e0 m\u1ed9t c\u00e1ch \u0111\u1ec3 thu h\u00fat ng\u01b0\u1eddi d\u00f9ng t\u01b0\u01a1ng t\u00e1c v\u00e0 \u0111\u00e1nh gi\u00e1 ki\u1ebfn \u200b\u200bth\u1ee9c c\u1ee7a h\u1ecd v\u1ec1 m\u1ed9t ch\u1ee7 \u0111\u1ec1 c\u1ee5 th\u1ec3. JavaScript th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o c\u00e1c c\u00e2u \u0111\u1ed1 \u0111\u1ed9ng v\u00e0 t\u01b0\u01a1ng t\u00e1c c\u00f3 th\u1ec3 cung c\u1ea5p ph\u1ea3n h\u1ed3i theo th\u1eddi gian th\u1ef1c cho ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<div class=\"refer_box\">\n<p class=\"refer_box_title\"> B\u1ea1n c\u00f3 th\u1ec3 mu\u1ed1n bi\u1ebft<\/p>\n<p class=\"refer_box_text\"> T\u1ea1o b\u00e0i ki\u1ec3m tra\/b\u00e0i \u0111\u00e1nh gi\u00e1 t\u1ef1 \u0111\u1ed9ng ch\u1ea5m \u0111i\u1ec3m m\u00e0 kh\u00f4ng c\u1ea7n b\u1ea5t k\u1ef3 m\u00e3 h\u00f3a n\u00e0o &#8211; <a href=\"https:\/\/onlineexammaker.com?refer=blog_refer\">h\u00e3y th\u1eed OnlineExamMaker ngay h\u00f4m nay<\/a> !<\/p>\n<\/div>\n<h3 id=\"a2\"> L\u1ee3i \u00edch c\u1ee7a vi\u1ec7c t\u1ea1o c\u00e2u \u0111\u1ed1 b\u1eb1ng JavaScript<\/h3>\n<p> <strong>Tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng t\u01b0\u01a1ng t\u00e1c:<\/strong> JavaScript cho ph\u00e9p b\u1ea1n t\u1ea1o tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng n\u0103ng \u0111\u1ed9ng v\u00e0 t\u01b0\u01a1ng t\u00e1c. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng JavaScript \u0111\u1ec3 c\u1eadp nh\u1eadt b\u00e0i ki\u1ec3m tra theo th\u1eddi gian th\u1ef1c d\u1ef1a tr\u00ean th\u00f4ng tin \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, cung c\u1ea5p ph\u1ea3n h\u1ed3i ngay l\u1eadp t\u1ee9c v\u00e0 hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3 m\u1ed9t c\u00e1ch linh ho\u1ea1t. T\u00ednh t\u01b0\u01a1ng t\u00e1c n\u00e0y c\u00f3 th\u1ec3 n\u00e2ng cao m\u1ee9c \u0111\u1ed9 t\u01b0\u01a1ng t\u00e1c c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 l\u00e0m cho b\u00e0i ki\u1ec3m tra tr\u1edf n\u00ean th\u00fa v\u1ecb h\u01a1n.<\/p>\n<p> <strong>T\u00ednh linh ho\u1ea1t v\u00e0 t\u00f9y ch\u1ec9nh:<\/strong> JavaScript cung c\u1ea5p m\u1ee9c \u0111\u1ed9 linh ho\u1ea1t v\u00e0 t\u00f9y ch\u1ecdn t\u00f9y ch\u1ec9nh cao. B\u1ea1n c\u00f3 to\u00e0n quy\u1ec1n ki\u1ec3m so\u00e1t thi\u1ebft k\u1ebf, b\u1ed1 c\u1ee5c v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a b\u00e0i ki\u1ec3m tra. B\u1ea1n c\u00f3 th\u1ec3 t\u00f9y ch\u1ec9nh giao di\u1ec7n c\u1ee7a b\u00e0i ki\u1ec3m tra, th\u00eam ho\u1ea1t \u1ea3nh, k\u1ebft h\u1ee3p c\u00e1c y\u1ebfu t\u1ed1 \u0111a ph\u01b0\u01a1ng ti\u1ec7n v\u00e0 t\u1ea1o h\u1ec7 th\u1ed1ng t\u00ednh \u0111i\u1ec3m ph\u1ee9c t\u1ea1p ho\u1eb7c logic ph\u00e2n nh\u00e1nh d\u1ef1a tr\u00ean ph\u1ea3n h\u1ed3i c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<p> <strong>X\u1eed l\u00fd ph\u00eda m\u00e1y kh\u00e1ch:<\/strong> JavaScript l\u00e0 ng\u00f4n ng\u1eef k\u1ecbch b\u1ea3n ph\u00eda m\u00e1y kh\u00e1ch, c\u00f3 ngh\u0129a l\u00e0 b\u00e0i ki\u1ec3m tra \u0111\u01b0\u1ee3c th\u1ef1c thi trong tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng m\u00e0 kh\u00f4ng c\u1ea7n y\u00eau c\u1ea7u c\u1ee7a m\u00e1y ch\u1ee7. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 mang l\u1ea1i th\u1eddi gian t\u1ea3i nhanh h\u01a1n v\u00e0 tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng li\u1ec1n m\u1ea1ch h\u01a1n v\u00ec ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi b\u00e0i ki\u1ec3m tra m\u00e0 kh\u00f4ng b\u1ecb gi\u00e1n \u0111o\u1ea1n.<\/p>\n<p> <strong>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch:<\/strong> JavaScript \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi t\u1ea5t c\u1ea3 c\u00e1c tr\u00ecnh duy\u1ec7t web ch\u00ednh, gi\u00fap nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 truy c\u1eadp b\u00e0i ki\u1ec3m tra c\u1ee7a b\u1ea1n. Cho d\u00f9 kh\u00e1n gi\u1ea3 c\u1ee7a b\u1ea1n \u0111ang s\u1eed d\u1ee5ng Chrome, Firefox, Safari hay c\u00e1c tr\u00ecnh duy\u1ec7t ph\u1ed5 bi\u1ebfn kh\u00e1c, h\u1ecd \u0111\u1ec1u c\u00f3 th\u1ec3 tham gia b\u00e0i ki\u1ec3m tra m\u00e0 kh\u00f4ng g\u1eb7p v\u1ea5n \u0111\u1ec1 v\u1ec1 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch.<\/p>\n<div class=\"embed_video_blog\">\n<div class=\"embed-responsive embed-responsive-16by9\" style=\"margin-bottom:16px;\">\n <iframe class=\"embed-responsive-item\" src=\"https:\/\/www.youtube.com\/embed\/bv7AAAyFOo4\"><\/iframe>\n<\/div>\n<\/div>\n<div class=\"getstarted-container\">\n<p style=\"margin-bottom: 13px;\">T\u1ea1o b\u00e0i ki\u1ec3m tra\/b\u00e0i ki\u1ec3m tra ti\u1ebfp theo c\u1ee7a b\u1ea1n v\u1edbi OnlineExamMaker<\/p>\n<div class=\"blog_double_btn clearfix\">\n<div class=\"col-sm-6  col-xs-12\">\n<div class=\"p-style-a\"><a class=\"get_started_btn\" href=\"https:\/\/onlineexammaker.com\/sign-up.html?refer=blog_btn\"> B\u1eaft \u0111\u1ea7u mi\u1ec5n ph\u00ed<\/a><\/div>\n<div class=\"p-style-b\">SAAS, mi\u1ec5n ph\u00ed m\u00e3i m\u00e3i<\/div>\n<\/div>\n<div class=\"col-sm-6  col-xs-12\">\n<div class=\"p-style-a\"><a class=\"get_started_btn\" href=\"https:\/\/onlineexammaker.com\/lan.html?refer=blog_btn\">On-Premise: T\u1ea3i xu\u1ed1ng<\/a><\/div>\n<div class=\"p-style-b\">Quy\u1ec1n s\u1edf h\u1eefu d\u1eef li\u1ec7u 100%<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3 id=\"a3\">H\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc: C\u00e1ch t\u1ea1o c\u00e2u \u0111\u1ed1 trong Javascript<\/h3>\n<h4> T\u1ea1o c\u00e2u \u0111\u1ed1 b\u1eb1ng JavaScript c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t c\u00e1ch th\u00fa v\u1ecb \u0111\u1ec3 ki\u1ec3m tra ki\u1ebfn \u200b\u200bth\u1ee9c c\u1ee7a ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c thu h\u00fat h\u1ecd v\u00e0o tr\u1ea3i nghi\u1ec7m h\u1ecdc t\u1eadp t\u01b0\u01a1ng t\u00e1c. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc v\u1ec1 c\u00e1ch t\u1ea1o b\u00e0i ki\u1ec3m tra b\u1eb1ng JavaScript:<\/h4>\n<h4> B\u01b0\u1edbc 1: Thi\u1ebft l\u1eadp c\u1ea5u tr\u00fac HTML <\/h4>\n<p><img decoding=\"async\" class=\"img-responsive\" src=\"https:\/\/onlineexammaker.com\/img\/guides-images\/\" alt=\"\"><br \/>\n B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch t\u1ea1o c\u1ea5u tr\u00fac HTML cho b\u00e0i ki\u1ec3m tra c\u1ee7a b\u1ea1n. S\u1eed d\u1ee5ng ph\u1ea7n t\u1eed &#39;div&#39; \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c ph\u1ea7n kh\u00e1c nhau nh\u01b0 h\u1ed9p b\u00e0i ki\u1ec3m tra, c\u00e2u h\u1ecfi, t\u00f9y ch\u1ecdn v\u00e0 n\u00fat g\u1eedi. Cung c\u1ea5p cho m\u1ed7i ph\u1ea7n t\u1eed m\u1ed9t ID ho\u1eb7c l\u1edbp duy nh\u1ea5t \u0111\u1ec3 d\u1ec5 d\u00e0ng tham chi\u1ebfu trong JavaScript.<\/p>\n<h4> B\u01b0\u1edbc 2: T\u1ea1o c\u00e2u h\u1ecfi tr\u1eafc nghi\u1ec7m v\u00e0 c\u00e1c ph\u01b0\u01a1ng \u00e1n <\/h4>\n<p><img decoding=\"async\" class=\"img-responsive\" src=\"https:\/\/onlineexammaker.com\/img\/guides-images\/\" alt=\"\"><br \/>\n Khai b\u00e1o m\u1ed9t m\u1ea3ng \u0111\u1ed1i t\u01b0\u1ee3ng trong JavaScript \u0111\u1ec3 l\u01b0u tr\u1eef c\u00e1c c\u00e2u h\u1ecfi tr\u1eafc nghi\u1ec7m c\u1ee7a b\u1ea1n v\u00e0 c\u00e1c t\u00f9y ch\u1ecdn t\u01b0\u01a1ng \u1ee9ng. M\u1ed7i \u0111\u1ed1i t\u01b0\u1ee3ng n\u00ean ch\u1ee9a m\u1ed9t c\u00e2u h\u1ecfi v\u00e0 m\u1ed9t lo\u1ea1t c\u00e1c l\u1ef1a ch\u1ecdn.<\/p>\n<h4> B\u01b0\u1edbc 3: Hi\u1ec3n th\u1ecb c\u00e2u h\u1ecfi tr\u1eafc nghi\u1ec7m <\/h4>\n<p><img decoding=\"async\" class=\"img-responsive\" src=\"https:\/\/onlineexammaker.com\/img\/guides-images\/\" alt=\"\"><br \/>\n B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng JavaScript, truy c\u1eadp ph\u1ea7n t\u1eed v\u00f9ng ch\u1ee9a b\u00e0i ki\u1ec3m tra t\u1eeb HTML v\u00e0 t\u1ef1 \u0111\u1ed9ng t\u1ea1o c\u00e1c c\u00e2u h\u1ecfi b\u00e0i ki\u1ec3m tra c\u0169ng nh\u01b0 c\u00e1c t\u00f9y ch\u1ecdn c\u1ee7a ch\u00fang. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng v\u00f2ng l\u1eb7p v\u00e0 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c thao t\u00e1c DOM nh\u01b0 &quot;createElement&quot;, &quot;appendChild&quot; v\u00e0 &quot;textContent&quot; \u0111\u1ec3 t\u1ea1o v\u00e0 hi\u1ec3n th\u1ecb c\u00e1c ph\u1ea7n t\u1eed b\u00e0i ki\u1ec3m tra.<\/p>\n<h4> B\u01b0\u1edbc 4: X\u1eed l\u00fd th\u00f4ng tin ng\u01b0\u1eddi d\u00f9ng nh\u1eadp v\u00e0 ch\u1ea5m \u0111i\u1ec3m <\/h4>\n<p><img decoding=\"async\" class=\"img-responsive\" src=\"https:\/\/onlineexammaker.com\/img\/guides-images\/\" alt=\"\"><br \/>\n Th\u00eam tr\u00ecnh x\u1eed l\u00fd s\u1ef1 ki\u1ec7n v\u00e0o c\u00e1c t\u00f9y ch\u1ecdn ho\u1eb7c n\u00fat g\u1eedi \u0111\u1ec3 ghi l\u1ea1i c\u00e2u tr\u1ea3 l\u1eddi c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. Khi ng\u01b0\u1eddi d\u00f9ng ch\u1ecdn m\u1ed9t t\u00f9y ch\u1ecdn ho\u1eb7c g\u1eedi b\u00e0i ki\u1ec3m tra, h\u00e3y truy xu\u1ea5t c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00e3 ch\u1ecdn v\u00e0 so s\u00e1nh n\u00f3 v\u1edbi c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang \u0111\u01b0\u1ee3c l\u01b0u trong m\u1ea3ng `quizQuestions`. Theo d\u00f5i \u0111i\u1ec3m s\u1ed1 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 c\u1eadp nh\u1eadt n\u00f3 cho ph\u00f9 h\u1ee3p.<\/p>\n<h4> B\u01b0\u1edbc 5: T\u00ednh to\u00e1n v\u00e0 hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3 <\/h4>\n<p><img decoding=\"async\" class=\"img-responsive\" src=\"https:\/\/onlineexammaker.com\/img\/guides-images\/\" alt=\"\"><br \/>\n Sau khi ng\u01b0\u1eddi d\u00f9ng ho\u00e0n th\u00e0nh b\u00e0i ki\u1ec3m tra, h\u00e3y t\u00ednh \u0111i\u1ec3m cu\u1ed1i c\u00f9ng c\u1ee7a h\u1ecd d\u1ef1a tr\u00ean s\u1ed1 c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 cung c\u1ea5p ph\u1ea3n h\u1ed3i v\u1ec1 t\u1eebng c\u00e2u h\u1ecfi, cho bi\u1ebft ng\u01b0\u1eddi d\u00f9ng tr\u1ea3 l\u1eddi \u0111\u00fang hay sai. C\u1eadp nh\u1eadt n\u1ed9i dung HTML \u0111\u1ec3 hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3 v\u00e0 \u0111i\u1ec3m s\u1ed1.<\/p>\n<h4> B\u01b0\u1edbc 6: T\u1ea1o ki\u1ec3u v\u00e0 t\u00f9y ch\u1ec9nh b\u00e0i ki\u1ec3m tra <\/h4>\n<p><img decoding=\"async\" class=\"img-responsive\" src=\"https:\/\/onlineexammaker.com\/img\/guides-images\/\" alt=\"\"><br \/>\n S\u1eed d\u1ee5ng CSS \u0111\u1ec3 t\u1ea1o ki\u1ec3u cho c\u00e1c ph\u1ea7n t\u1eed b\u00e0i ki\u1ec3m tra, l\u00e0m cho ch\u00fang tr\u1edf n\u00ean h\u1ea5p d\u1eabn v\u1ec1 m\u1eb7t h\u00ecnh \u1ea3nh v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi d\u00f9ng. \u00c1p d\u1ee5ng c\u00e1c ki\u1ec3u cho h\u1ed9p c\u00e2u h\u1ecfi, c\u00e2u h\u1ecfi, t\u00f9y ch\u1ecdn v\u00e0 ph\u1ea7n k\u1ebft qu\u1ea3 \u0111\u1ec3 t\u1ea1o ra m\u1ed9t thi\u1ebft k\u1ebf h\u1ea5p d\u1eabn v\u00e0 g\u1eafn k\u1ebft.<\/p>\n<h3 id=\"a4\">Gi\u1ea3i ph\u00e1p thay th\u1ebf: T\u1ea1o b\u00e0i ki\u1ec3m tra t\u01b0\u01a1ng t\u00e1c b\u1eb1ng OnlineExamMaker<\/h3>\n<p> Ngo\u00e0i vi\u1ec7c t\u1ea1o b\u00e0i ki\u1ec3m tra t\u1eeb \u0111\u1ea7u b\u1eb1ng Javascript, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o b\u00e0i ki\u1ec3m tra t\u01b0\u01a1ng t\u00e1c b\u1eb1ng ph\u1ea7n m\u1ec1m t\u1ea1o b\u00e0i ki\u1ec3m tra tr\u1ef1c tuy\u1ebfn t\u1ea5t c\u1ea3 trong m\u1ed9t. OnlineExamMaker l\u00e0 m\u1ed9t n\u1ec1n t\u1ea3ng b\u00e0i ki\u1ec3m tra \u0111\u00e1m m\u00e2y m\u1ea1nh m\u1ebd cho ph\u00e9p gi\u00e1o vi\u00ean, gi\u1ea3ng vi\u00ean, nh\u00e0 ti\u1ebfp th\u1ecb v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n t\u1ea1o m\u1ed9t b\u00e0i ki\u1ec3m tra tr\u1ef1c tuy\u1ebfn th\u00fa v\u1ecb trong v\u00e0i ph\u00fat.<\/p>\n<div class=\"getstarted-container\">\n<p style=\"margin-bottom: 13px;\">T\u1ea1o b\u00e0i ki\u1ec3m tra\/b\u00e0i ki\u1ec3m tra ti\u1ebfp theo c\u1ee7a b\u1ea1n v\u1edbi OnlineExamMaker<\/p>\n<div class=\"blog_double_btn clearfix\">\n<div class=\"col-sm-6  col-xs-12\">\n<div class=\"p-style-a\"><a class=\"get_started_btn\" href=\"https:\/\/onlineexammaker.com\/sign-up.html?refer=blog_btn\"> B\u1eaft \u0111\u1ea7u mi\u1ec5n ph\u00ed<\/a><\/div>\n<div class=\"p-style-b\">SAAS, mi\u1ec5n ph\u00ed m\u00e3i m\u00e3i<\/div>\n<\/div>\n<div class=\"col-sm-6  col-xs-12\">\n<div class=\"p-style-a\"><a class=\"get_started_btn\" href=\"https:\/\/onlineexammaker.com\/lan.html?refer=blog_btn\">On-Premise: T\u1ea3i xu\u1ed1ng<\/a><\/div>\n<div class=\"p-style-b\">Quy\u1ec1n s\u1edf h\u1eefu d\u1eef li\u1ec7u 100%<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3 id=\"a5\">M\u1eb9o \u0111\u1ec3 t\u1ea1o c\u00e2u \u0111\u1ed1 trong JavaScript<\/h3>\n<p> T\u1ea1o m\u1ed9t b\u00e0i ki\u1ec3m tra b\u1eb1ng JavaScript bao g\u1ed3m m\u1ed9t s\u1ed1 b\u01b0\u1edbc v\u00e0 d\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 m\u1eb9o gi\u00fap b\u1ea1n x\u00e2y d\u1ef1ng m\u1ed9t b\u00e0i ki\u1ec3m tra hi\u1ec7u qu\u1ea3 v\u00e0 h\u1ea5p d\u1eabn:<\/p>\n<p> <strong>L\u1eadp k\u1ebf ho\u1ea1ch c\u1ea5u tr\u00fac b\u00e0i ki\u1ec3m tra c\u1ee7a b\u1ea1n<\/strong><br \/>\n X\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u00e2u h\u1ecfi, lo\u1ea1i c\u00e2u h\u1ecfi v\u00e0 c\u00e1ch t\u00ednh \u0111i\u1ec3m.<br \/>\n S\u1eafp x\u1ebfp c\u00e1c c\u00e2u h\u1ecfi v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi c\u1ee7a b\u1ea1n theo \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac, gi\u1ed1ng nh\u01b0 m\u1ed9t m\u1ea3ng \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n<p> <strong>C\u1ea5u tr\u00fac HTML<\/strong><br \/>\n T\u1ea1o c\u1ea5u tr\u00fac HTML r\u00f5 r\u00e0ng v\u00e0 c\u00f3 t\u1ed5 ch\u1ee9c cho b\u00e0i ki\u1ec3m tra c\u1ee7a b\u1ea1n. S\u1eed d\u1ee5ng ph\u1ea7n t\u1eed div \u0111\u1ec3 ph\u00e2n t\u00e1ch c\u00e1c ph\u1ea7n kh\u00e1c nhau nh\u01b0 h\u1ed9p c\u00e2u h\u1ecfi, n\u00fat tr\u1ea3 l\u1eddi v\u00e0 hi\u1ec3n th\u1ecb \u0111i\u1ec3m.<\/p>\n<p> <strong>T\u1ea1o ki\u1ec3u CSS<\/strong><br \/>\n \u00c1p d\u1ee5ng c\u00e1c ki\u1ec3u CSS \u0111\u1ec3 l\u00e0m cho b\u00e0i ki\u1ec3m tra c\u1ee7a b\u1ea1n tr\u1edf n\u00ean h\u1ea5p d\u1eabn v\u1ec1 m\u1eb7t h\u00ecnh \u1ea3nh. S\u1eed d\u1ee5ng ki\u1ec3u d\u00e1ng nh\u1ea5t qu\u00e1n cho c\u00e1c n\u00fat, v\u0103n b\u1ea3n v\u00e0 b\u1ed1 c\u1ee5c.<br \/>\n H\u00e3y c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng truy v\u1ea5n ph\u01b0\u01a1ng ti\u1ec7n \u0111\u1ec3 l\u00e0m cho b\u00e0i ki\u1ec3m tra c\u1ee7a b\u1ea1n ph\u1ea3n h\u1ed3i nhanh tr\u00ean c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c nhau.<\/p>\n<p> <strong>Logic JavaScript<\/strong><br \/>\n Vi\u1ebft m\u00e3 JavaScript theo m\u00f4-\u0111un v\u00e0 \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c t\u1ed1t. Chia m\u00e3 c\u1ee7a b\u1ea1n th\u00e0nh c\u00e1c h\u00e0m x\u1eed l\u00fd c\u00e1c t\u00e1c v\u1ee5 c\u1ee5 th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 hi\u1ec3n th\u1ecb c\u00e2u h\u1ecfi, x\u1eed l\u00fd th\u00f4ng tin \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 t\u00ednh \u0111i\u1ec3m.<\/p>\n<p> <strong>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch tr\u00ean nhi\u1ec1u tr\u00ecnh duy\u1ec7t<\/strong><br \/>\n H\u00e3y ch\u00fa \u00fd \u0111\u1ebfn c\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch gi\u1eefa nhi\u1ec1u tr\u00ecnh duy\u1ec7t. Ki\u1ec3m tra b\u00e0i ki\u1ec3m tra c\u1ee7a b\u1ea1n trong nhi\u1ec1u tr\u00ecnh duy\u1ec7t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng nh\u1ea5t qu\u00e1n.<\/p>\n<p> <strong>Thi\u1ebft k\u1ebf th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi d\u00f9ng<\/strong><br \/>\n Gi\u1eef thi\u1ebft k\u1ebf \u0111\u01a1n gi\u1ea3n v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi d\u00f9ng. Tr\u00e1nh s\u1ef1 l\u1ed9n x\u1ed9n v\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 kh\u00f4ng c\u1ea7n thi\u1ebft c\u00f3 th\u1ec3 khi\u1ebfn ng\u01b0\u1eddi d\u00f9ng m\u1ea5t t\u1eadp trung.<\/p>\n<p> <strong>T\u00e0i li\u1ec7u<\/strong><br \/>\n Nh\u1eadn x\u00e9t m\u00e3 c\u1ee7a b\u1ea1n \u0111\u1ec3 ch\u00ednh b\u1ea1n v\u00e0 nh\u1eefng ng\u01b0\u1eddi kh\u00e1c c\u00f3 th\u1ec3 l\u00e0m vi\u1ec7c ho\u1eb7c xem l\u1ea1i m\u00e3 c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c.<\/p>\n<h3 id=\"a6\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 T\u1ea1o c\u00e2u \u0111\u1ed1 trong JavaScript<\/h3>\n<p> <strong>C\u00e1c th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu c\u1ee7a m\u1ed9t b\u00e0i ki\u1ec3m tra \u0111\u01b0\u1ee3c t\u1ea1o b\u1eb1ng JavaScript l\u00e0 g\u00ec?<\/strong><br \/>\n C\u00e1c th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu bao g\u1ed3m HTML \u0111\u1ec3 c\u1ea5u tr\u00fac b\u00e0i ki\u1ec3m tra, CSS \u0111\u1ec3 t\u1ea1o ki\u1ec3u v\u00e0 JavaScript \u0111\u1ec3 x\u1eed l\u00fd logic b\u00e0i ki\u1ec3m tra. C\u00e1c y\u1ebfu t\u1ed1 quan tr\u1ecdng bao g\u1ed3m h\u1ed9p c\u00e2u h\u1ecfi, n\u00fat tr\u1ea3 l\u1eddi, h\u1ec7 th\u1ed1ng t\u00ednh \u0111i\u1ec3m v\u00e0 b\u1ea5t k\u1ef3 t\u00ednh n\u0103ng b\u1ed5 sung n\u00e0o nh\u01b0 \u0111\u1ed3ng h\u1ed3 h\u1eb9n gi\u1edd ho\u1eb7c ch\u1ec9 b\u00e1o ti\u1ebfn tr\u00ecnh.<\/p>\n<p> <strong>L\u00e0m c\u00e1ch n\u00e0o t\u00f4i c\u00f3 th\u1ec3 c\u1ea5u tr\u00fac d\u1eef li\u1ec7u b\u00e0i ki\u1ec3m tra c\u1ee7a m\u00ecnh b\u1eb1ng JavaScript?<\/strong><br \/>\n S\u1eafp x\u1ebfp d\u1eef li\u1ec7u b\u00e0i ki\u1ec3m tra c\u1ee7a b\u1ea1n d\u01b0\u1edbi d\u1ea1ng m\u1ed9t m\u1ea3ng c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng. M\u1ed7i \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ea3i \u0111\u1ea1i di\u1ec7n cho m\u1ed9t c\u00e2u h\u1ecfi v\u00e0 ch\u1ee9a c\u00e1c thu\u1ed9c t\u00ednh nh\u01b0 v\u0103n b\u1ea3n c\u00e2u h\u1ecfi v\u00e0 m\u1ed9t lo\u1ea1t c\u00e1c t\u00f9y ch\u1ecdn tr\u1ea3 l\u1eddi. M\u1ed7i t\u00f9y ch\u1ecdn tr\u1ea3 l\u1eddi ph\u1ea3i c\u00f3 thu\u1ed9c t\u00ednh v\u0103n b\u1ea3n v\u00e0 thu\u1ed9c t\u00ednh ch\u00ednh x\u00e1c cho bi\u1ebft \u0111\u00f3 c\u00f3 ph\u1ea3i l\u00e0 c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang hay kh\u00f4ng.<\/p>\n<p> <strong>L\u00e0m c\u00e1ch n\u00e0o t\u00f4i c\u00f3 th\u1ec3 tri\u1ec3n khai b\u1ed9 \u0111\u1ebfm th\u1eddi gian trong b\u00e0i ki\u1ec3m tra c\u1ee7a m\u00ecnh?<\/strong><br \/>\n B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng h\u00e0m &quot;setInterval&quot; c\u1ee7a JavaScript \u0111\u1ec3 t\u1ea1o \u0111\u1ed3ng h\u1ed3 \u0111\u1ebfm ng\u01b0\u1ee3c. B\u1eaft \u0111\u1ea7u h\u1eb9n gi\u1edd khi m\u1ed9t c\u00e2u h\u1ecfi \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb v\u00e0 \u0111\u1eb7t l\u1ea1i n\u00f3 cho m\u1ed7i c\u00e2u h\u1ecfi m\u1edbi. T\u00f9y ch\u1ecdn, b\u1ea1n c\u00f3 th\u1ec3 ph\u1ea1t ng\u01b0\u1eddi d\u00f9ng v\u00ec h\u1ebft th\u1eddi gian.<\/p>\n<p> <strong>M\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t \u0111\u1ec3 t\u1ea1o b\u00e0i ki\u1ec3m tra c\u00f3 th\u1ec3 truy c\u1eadp b\u1eb1ng JavaScript l\u00e0 g\u00ec?<\/strong><br \/>\n S\u1eed d\u1ee5ng HTML ng\u1eef ngh\u0129a, cung c\u1ea5p v\u0103n b\u1ea3n thay th\u1ebf cho h\u00ecnh \u1ea3nh v\u00e0 \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u00e0i ki\u1ec3m tra c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 \u0111i\u1ec1u h\u01b0\u1edbng \u0111\u01b0\u1ee3c b\u1eb1ng b\u00e0n ph\u00edm. Ki\u1ec3m tra b\u00e0i ki\u1ec3m tra c\u1ee7a b\u1ea1n b\u1eb1ng tr\u00ecnh \u0111\u1ecdc m\u00e0n h\u00ecnh \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 tr\u1ee3 n\u0103ng.<\/p>\n<p> <strong>L\u00e0m c\u00e1ch n\u00e0o t\u00f4i c\u00f3 th\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u nh\u1eadp c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 \u0111\u00e1nh gi\u00e1 c\u00e2u tr\u1ea3 l\u1eddi b\u1eb1ng JavaScript?<\/strong><br \/>\n S\u1eed d\u1ee5ng tr\u00ecnh x\u1eed l\u00fd s\u1ef1 ki\u1ec7n \u0111\u1ec3 ghi l\u1ea1i l\u01b0\u1ee3t nh\u1ea5p chu\u1ed9t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0o n\u00fat tr\u1ea3 l\u1eddi. So s\u00e1nh c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00e3 ch\u1ecdn v\u1edbi c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang v\u00e0 c\u1eadp nh\u1eadt \u0111i\u1ec3m t\u01b0\u01a1ng \u1ee9ng. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb ph\u1ea3n h\u1ed3i cho ng\u01b0\u1eddi d\u00f9ng d\u1ef1a tr\u00ean t\u00ednh ch\u00ednh x\u00e1c c\u1ee7a ph\u1ea3n h\u1ed3i c\u1ee7a h\u1ecd.<\/p>\n<p> <strong>L\u00e0m c\u00e1ch n\u00e0o t\u00f4i c\u00f3 th\u1ec3 ki\u1ec3m tra b\u00e0i ki\u1ec3m tra c\u1ee7a m\u00ecnh v\u1ec1 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch gi\u1eefa nhi\u1ec1u tr\u00ecnh duy\u1ec7t?<\/strong><br \/>\n Ki\u1ec3m tra b\u00e0i ki\u1ec3m tra c\u1ee7a b\u1ea1n tr\u00ean nhi\u1ec1u tr\u00ecnh duy\u1ec7t (ch\u1eb3ng h\u1ea1n nh\u01b0 Chrome, Firefox, Safari v\u00e0 Edge) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u00e0i ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh. H\u00e3y ch\u00fa \u00fd \u0111\u1ebfn m\u1ecdi v\u1ea5n \u0111\u1ec1 c\u1ee5 th\u1ec3 c\u1ee7a tr\u00ecnh duy\u1ec7t v\u00e0 \u0111i\u1ec1u ch\u1ec9nh m\u00e3 c\u1ee7a b\u1ea1n cho ph\u00f9 h\u1ee3p.<\/p>\n<p><strong>T\u00f4i n\u00ean cung c\u1ea5p t\u00e0i li\u1ec7u g\u00ec cho m\u00e3 b\u00e0i ki\u1ec3m tra c\u1ee7a m\u00ecnh?<\/strong><br \/>\n Th\u00eam nh\u1eadn x\u00e9t v\u00e0o m\u00e3 JavaScript c\u1ee7a b\u1ea1n \u0111\u1ec3 gi\u1ea3i th\u00edch m\u1ee5c \u0111\u00edch c\u1ee7a h\u00e0m, bi\u1ebfn v\u00e0 b\u1ea5t k\u1ef3 logic ph\u1ee9c t\u1ea1p n\u00e0o. Vi\u1ec7c ghi l\u1ea1i m\u00e3 c\u1ee7a b\u1ea1n gi\u00fap ng\u01b0\u1eddi kh\u00e1c (v\u00e0 ch\u00ednh b\u1ea1n) d\u1ec5 d\u00e0ng hi\u1ec3u v\u00e0 duy tr\u00ec m\u00e3 h\u01a1n trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vi\u1ec7c t\u1ea1o b\u00e0i ki\u1ec3m tra b\u1eb1ng JavaScript mang l\u1ea1i m\u1ed9t s\u1ed1 l\u1ee3i \u00edch v\u00e0 c\u01a1 h\u1ed9i \u0111\u1ec3 t\u00f9y ch\u1ec9nh v\u00e0 t\u01b0\u01a1ng t\u00e1c. M\u1ee5c l\u1ee5c C\u00e2u \u0111\u1ed1 trong JavaScript l\u00e0 g\u00ec? L\u1ee3i \u00edch c\u1ee7a vi\u1ec7c t\u1ea1o c\u00e2u \u0111\u1ed1 b\u1eb1ng JavaScrip H\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc: C\u00e1ch t\u1ea1o c\u00e2u \u0111\u1ed1 trong Javascript Gi\u1ea3i ph\u00e1p thay th\u1ebf: T\u1ea1o b\u00e0i [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":23505,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5887],"tags":[],"class_list":["post-30086","post","type-post","status-publish","format-standard","hentry","category-online-quiz-tips-vi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u00e1ch t\u1ea1o c\u00e2u \u0111\u1ed1 trong Javascript - OnlineExamMaker Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/onlineexammaker.com\/kb\/vi\/how-to-create-a-quiz-in-javascript-20\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u00e1ch t\u1ea1o c\u00e2u \u0111\u1ed1 trong Javascript - OnlineExamMaker Blog\" \/>\n<meta property=\"og:description\" content=\"Vi\u1ec7c t\u1ea1o b\u00e0i ki\u1ec3m tra b\u1eb1ng JavaScript mang l\u1ea1i m\u1ed9t s\u1ed1 l\u1ee3i \u00edch v\u00e0 c\u01a1 h\u1ed9i \u0111\u1ec3 t\u00f9y ch\u1ec9nh v\u00e0 t\u01b0\u01a1ng t\u00e1c. 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