{"id":210,"date":"2020-02-28T17:08:54","date_gmt":"2020-02-28T17:08:54","guid":{"rendered":"https:\/\/www.369usa.com\/blog\/?p=210"},"modified":"2020-02-28T17:10:04","modified_gmt":"2020-02-28T17:10:04","slug":"use-jquery-to-dynamically-update-days-field-when-year-month-changes","status":"publish","type":"post","link":"https:\/\/www.369usa.com\/blog\/use-jquery-to-dynamically-update-days-field-when-year-month-changes\/","title":{"rendered":"Use JQuery to dynamically update day’s field when year\/month changes"},"content":{"rendered":"

JQuery Code:<\/p>\n

\r\n\r\n\/\/Adjust date picker days in month.\r\n$('select[name=birth_year],select[name=birth_month]').change(function(){\r\n    \r\n    var year = $('select[name=birth_year]').val();\r\n    var month = $('select[name=birth_month]').val();\r\n\r\n    var days_in_month = 31;\r\n\r\n    if( month == 2 && year % 4 == 0 ){\r\n        days_in_month = 29;\r\n    }\r\n    else if( month == 2 && year % 4 != 0 ){\r\n        days_in_month = 28;\r\n    }\r\n    else if( $.inArray(parseInt(month,10), [4,6,9,11]) !== -1 ){\r\n        days_in_month = 30;\r\n    }\r\n\r\n    var $days_selector = $('select[name=birth_day]');\r\n\r\n    for( var i = $days_selector.children().length; i < days_in_month; i++ ){\r\n        $days_selector.append('<option value="'+(i+1)+'">'+(i+1)+'<\/option>');\r\n    }\r\n\r\n    $days_selector.find('option:gt('+(days_in_month-1)+')').remove();\r\n    \r\n});\r\n\r\n<\/pre>\n
HTML Code:<\/p>\n
\r\n\r\n<select name="birth_year">\r\n\t\t<option value="1970">1970<\/option>\r\n\t\t<option value="1971">1971<\/option>\r\n\t\t<option value="1972">1972<\/option>\r\n\t\t<option value="1973">1973<\/option>\r\n\t\t<option value="1974">1974<\/option>\r\n\t\t<option value="1975">1975<\/option>\r\n\t\t<option value="1976">1976<\/option>\r\n\t\t<option value="1977">1977<\/option>\r\n\t\t<option value="1978">1978<\/option>\r\n\t\t<option value="1979">1979<\/option>\r\n\t\t<option value="1980">1980<\/option>\r\n\t\t<option value="1981">1981<\/option>\r\n\t\t<option value="1982">1982<\/option>\r\n\t\t<option value="1983">1983<\/option>\r\n\t\t<option value="1984">1984<\/option>\r\n\t\t<option value="1985">1985<\/option>\r\n\t\t<option value="1986">1986<\/option>\r\n\t\t<option value="1987">1987<\/option>\r\n\t\t<option value="1988">1988<\/option>\r\n\t\t<option value="1989">1989<\/option>\r\n\t\t<option value="1990" selected>1990<\/option>\r\n\t\t<option value="1991">1991<\/option>\r\n\t\t<option value="1992">1992<\/option>\r\n\t\t<option value="1993">1993<\/option>\r\n\t\t<option value="1994">1994<\/option>\r\n\t\t<option value="1995">1995<\/option>\r\n\t\t<option value="1996">1996<\/option>\r\n\t\t<option value="1997">1997<\/option>\r\n\t\t<option value="1998">1998<\/option>\r\n\t\t<option value="1999">1999<\/option>\r\n\t\t<option value="2000">2000<\/option>\r\n\t\t<option value="2001">2001<\/option>\r\n\t\t<option value="2002">2002<\/option>\r\n<\/select>\r\n<select class="small" name="birth_month">\r\n\t\t<option value="1" selected>1<\/option>\r\n\t\t<option value="2">2<\/option>\r\n\t\t<option value="3">3<\/option>\r\n\t\t<option value="4">4<\/option>\r\n\t\t<option value="5">5<\/option>\r\n\t\t<option value="6">6<\/option>\r\n\t\t<option value="7">7<\/option>\r\n\t\t<option value="8">8<\/option>\r\n\t\t<option value="9">9<\/option>\r\n\t\t<option value="10">10<\/option>\r\n\t\t<option value="11">11<\/option>\r\n\t\t<option value="12">12<\/option>\r\n<\/select>\r\n<select class="small" name="birth_day">\r\n\t\t<option value="1" selected>1<\/option>\r\n\t\t<option value="2">2<\/option>\r\n\t\t<option value="3">3<\/option>\r\n\t\t<option value="4">4<\/option>\r\n\t\t<option value="5">5<\/option>\r\n\t\t<option value="6">6<\/option>\r\n\t\t<option value="7">7<\/option>\r\n\t\t<option value="8">8<\/option>\r\n\t\t<option value="9">9<\/option>\r\n\t\t<option value="10">10<\/option>\r\n\t\t<option value="11">11<\/option>\r\n\t\t<option value="12">12<\/option>\r\n\t\t<option value="13">13<\/option>\r\n\t\t<option value="14">14<\/option>\r\n\t\t<option value="15">15<\/option>\r\n\t\t<option value="16">16<\/option>\r\n\t\t<option value="17">17<\/option>\r\n\t\t<option value="18">18<\/option>\r\n\t\t<option value="19">19<\/option>\r\n\t\t<option value="20">20<\/option>\r\n\t\t<option value="21">21<\/option>\r\n\t\t<option value="22">22<\/option>\r\n\t\t<option value="23">23<\/option>\r\n\t\t<option value="24">24<\/option>\r\n\t\t<option value="25">25<\/option>\r\n\t\t<option value="26">26<\/option>\r\n\t\t<option value="27">27<\/option>\r\n\t\t<option value="28">28<\/option>\r\n\t\t<option value="29">29<\/option>\r\n\t\t<option value="30">30<\/option>\r\n\t\t<option value="31">31<\/option>\r\n<\/select>\r\n\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
JQuery Code: \/\/Adjust date picker days in month. $(‘select[name=birth_year],select[name=birth_month]’).change(function(){ var year = $(‘select[name=birth_year]’).val(); var month = $(‘select[name=birth_month]’).val(); var days_in_month = 31; if( month == 2 && year % 4 == 0 ){ days_in_month = 29; } else if( month == 2 && year % 4 != 0 ){ days_in_month = 28; } else if( $.inArray(parseInt(month,10), … Continue reading “Use JQuery to dynamically update day’s field when year\/month changes”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-210","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nUse JQuery to dynamically update day's field when year\/month changes - \u7ebd\u7ea6\u7f51\u7ad9\u8bbe\u8ba1\u535a\u5ba2<\/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:\/\/www.369usa.com\/blog\/use-jquery-to-dynamically-update-days-field-when-year-month-changes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Use JQuery to dynamically update day's field when year\/month changes - \u7ebd\u7ea6\u7f51\u7ad9\u8bbe\u8ba1\u535a\u5ba2\" \/>\n<meta property=\"og:description\" content=\"JQuery Code: \/\/Adjust date picker days in month. $('select[name=birth_year],select[name=birth_month]').change(function(){ var year = $('select[name=birth_year]').val(); 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