jQuery\u3067\u30d5\u30a9\u30fc\u30e0\u306e\u30bb\u30ec\u30af\u30c8\u30e1\u30cb\u30e5\u30fc\u3084\u30e9\u30b8\u30aa\u30dc\u30bf\u30f3\u7b49\u3001\u5404\u7a2e\u30d1\u30fc\u30c4\u3092\u64cd\u4f5c\u3059\u308b\u3053\u3068\u306f\u591a\u3005\u3042\u308b\u3082\u306e\u306e\u30c6\u30ad\u30b9\u30c8\u30dc\u30c3\u30af\u30b9\u53ca\u3073\u30c6\u30ad\u30b9\u30c8\u30a8\u30ea\u30a2\u4ee5\u5916\u306f\u6bce\u56deGoogle\u691c\u7d22\u3057\u3066\u3044\u305f\u3002\u3055\u3059\u304c\u306b\u6bce\u56de\u691c\u7d22\u3059\u308b\u306e\u306f\u9762\u5012\u81ed\u3044\u4e0a\u306b\u6642\u9593\u304c\u304b\u304b\u308b\u306e\u3067\u3053\u306e\u30da\u30fc\u30b8\u306b\u307e\u3068\u3081\u3066\u304a\u304f\u3002<\/p>\n
<\/p>\n
\u4ee5\u4e0b\u30c6\u30ad\u30b9\u30c8\u30dc\u30c3\u30af\u30b9\u3092\u8a2d\u7f6e\u3059\u308b\u60f3\u5b9a\u3002<\/p>\n
<input type=\"text\" name=\"text_box\" id=\"text_box\" data-key=\"test_key\"><\/pre>\n\u5024\u306e\u53d6\u5f97<\/h3>\n
\/\/value\u306e\u53d6\u5f97\r\nconst text_box = $('#text_box').val();\r\n\/\/\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u5c5e\u6027\u306e\u53d6\u5f97\r\nconst key = $('#text_box').data('key');<\/pre>\n\u5024\u3092\u524a\u9664(\u7a7a\u306b\u3059\u308b)<\/h3>\n
$('#text_box').val('');<\/pre>\n\u5024\u3092\u5165\u308c\u308b<\/h3>\n
$('#text_box').val('hoge');<\/pre>\n\u30d0\u30ea\u30c7\u30fc\u30c8(\u7a7a\u30c1\u30a7\u30c3\u30af)<\/h3>\n
const text_box = $('#text_box').val();\r\nif( !text_box ){\r\n alert('\u5165\u529b\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002');\r\n return false;\r\n}<\/pre>\n<\/p>\n
\u30c6\u30ad\u30b9\u30c8\u30a8\u30ea\u30a2 <textarea><\/h2>\n
\u4ee5\u4e0b\u30c6\u30ad\u30b9\u30c8\u30a8\u30ea\u30a2\u3092\u8a2d\u7f6e\u3059\u308b\u60f3\u5b9a\u3002<\/p>\n
<textarea name=\"textarea\" id=\"textarea\" data-key=\"test_key\"><\/textarea><\/pre>\n\u5024\u306e\u53d6\u5f97<\/h3>\n
\/\/value\u306e\u53d6\u5f97\r\nconst textarea = $('#textarea').val();\r\n\/\/\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u5c5e\u6027\u306e\u53d6\u5f97\r\nconst key = $('#textarea').data('key');<\/pre>\n\u5024\u3092\u524a\u9664(\u7a7a\u306b\u3059\u308b)<\/h3>\n
$('#textarea').val('');<\/pre>\n\u5024\u3092\u5165\u308c\u308b<\/h3>\n
\/\/1\u884c\u306e\u5834\u5408\r\n$('#textarea').val(\"hoge\");\r\n\/\/\u8907\u6570\u884c\u306e\u5834\u5408\u306f\\n\u3067\u6539\u884c\r\n$('#textarea').val(\"hoge\\nhoge\");<\/pre>\n\u30d0\u30ea\u30c7\u30fc\u30c8(\u7a7a\u30c1\u30a7\u30c3\u30af)<\/h3>\n
const textarea = $('#textarea').val();\r\nif( !textarea ){\r\n alert('\u5165\u529b\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002');\r\n return false;\r\n}<\/pre>\n<\/p>\n
\u30bb\u30ec\u30af\u30c8\u30e1\u30cb\u30e5\u30fc <select><\/h2>\n
\u4ee5\u4e0b\u30bb\u30ec\u30af\u30c8\u30e1\u30cb\u30e5\u30fc\u3092\u8a2d\u7f6e\u3059\u308b\u60f3\u5b9a\u3002<\/p>\n
<select name=\"select\" id=\"select\">\r\n <option value=\"\">\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/option>\r\n <option value=\"0\" data-price=\"100\" data-key=\"apple\">\u308a\u3093\u3054<\/option>\r\n <option value=\"1\" data-price=\"200\" data-key=\"strawberry\">\u3044\u3061\u3054<\/option>\r\n <option value=\"2\" data-price=\"300\" data-key=\"grape\">\u3076\u3069\u3046<\/option>\r\n<\/select><\/pre>\n\u9078\u629e\u3057\u305f\u9805\u76ee\u306e\u5024\u3092\u53d6\u5f97<\/h3>\n
\/\/value\u306e\u53d6\u5f97\r\nconst select = $('#select').val();\r\n\/\/<select>\u5185\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u53d6\u5f97\r\nconst\u00a0select\u00a0=\u00a0$('#select option:selected').text()\r\n\/\/\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u5c5e\u6027\u306e\u53d6\u5f97\r\nconst price = $('#select option:selected').data('price');\r\nconst key = $('#select option:selected').data('key');\r\n\/\/\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u5c5e\u6027\u3092name\u6307\u5b9a\u3067\u53d6\u5f97\r\nconst price = $('[name=select] option:selected').data('price');\r\nconst key = $('[name=select] option:selected').data('key');<\/pre>\n\u4efb\u610f\u306e\u9805\u76ee\u3092\u9078\u629e(value\u3067\u6307\u5b9a)<\/h3>\n
$('#select').val(1);<\/pre>\n\u4efb\u610f\u306e\u9805\u76ee\u3092\u9078\u629e(n\u756a\u76ee\u3067\u6307\u5b9a)<\/h3>\n
\/\/name\u6307\u5b9a\r\n$(`[name=select]`).prop(`selectedIndex`, 2);\r\n\r\n\/\/id\u6307\u5b9a\r\n$(`#select`).prop(`selectedIndex`, 3);<\/pre>\n\u30d0\u30ea\u30c7\u30fc\u30c8(\u672a\u9078\u629e\u30c1\u30a7\u30c3\u30af)<\/h3>\n
const select = $('#select').val();\r\nif( !select ){\r\n alert('\u9078\u629e\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002');\r\n return false;\r\n}<\/pre>\n<\/p>\n
\u30e9\u30b8\u30aa\u30dc\u30bf\u30f3 <input type=\"radio\"><\/h2>\n
\u4ee5\u4e0b\u30e9\u30b8\u30aa\u30dc\u30bf\u30f3\u3092\u8a2d\u7f6e\u3059\u308b\u60f3\u5b9a\u3002<\/p>\n
<label><input type=\"radio\" name=\"radio\" value=\"0\" data-price=\"100\" data-key=\"apple\">\u308a\u3093\u3054<\/label>\r\n<label><input type=\"radio\" name=\"radio\" value=\"1\" data-price=\"200\" data-key=\"strawberry\">\u3044\u3061\u3054<\/label>\r\n<label><input type=\"radio\" name=\"radio\" value=\"2\" data-price=\"300\" data-key=\"grape\">\u3076\u3069\u3046<\/label><\/pre>\n\u9078\u629e\u3057\u305f\u9805\u76ee\u306e\u5024\u3092\u53d6\u5f97<\/h3>\n
\/\/value\u306e\u53d6\u5f97\r\nconst radio = $('input[name=\"radio\"]:checked').val();\r\n\/\/\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u5c5e\u6027\u306e\u53d6\u5f97\r\nconst price = $('input[name=\"radio\"]:checked').data('price');\r\nconst key = $('input[name=\"radio\"]:checked').data('key');<\/pre>\n\u4efb\u610f\u306e\u9805\u76ee\u3092\u9078\u629e(value\u3067\u6307\u5b9a)<\/h3>\n
$('input[name=\"radio\"]').val(['1']);<\/pre>\n\u4efb\u610f\u306e\u5024\u3092\u9078\u629e(n\u756a\u76ee\u3067\u6307\u5b9a)<\/h3>\n
$(`input[name=\"radio\"]:eq(0)`).attr(`checked`, true);<\/pre>\n\u30c1\u30a7\u30c3\u30af\u3092\u5916\u3059<\/h3>\n
$('input[name=\"radio\"]').prop('checked', false);<\/pre>\n\u30d0\u30ea\u30c7\u30fc\u30c8(\u672a\u9078\u629e\u30c1\u30a7\u30c3\u30af)<\/h3>\n
const radio = $('input[name=\"radio\"]:checked').val();\r\nif( !radio ){\r\n alert('\u9078\u629e\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002');\r\n return false;\r\n}<\/pre>\n<\/p>\n
\u30c1\u30a7\u30c3\u30af\u30dc\u30c3\u30af\u30b9 <input type=\"checkbox\"><\/h2>\n
\u4ee5\u4e0b\u30c1\u30a7\u30c3\u30af\u30dc\u30c3\u30af\u30b9\u3092\u8a2d\u7f6e\u3059\u308b\u60f3\u5b9a\u3002<\/p>\n
<label><input type=\"checkbox\" name=\"checkbox[]\" value=\"0\" data-price=\"100\" data-key=\"apple\">\u308a\u3093\u3054<\/label>\r\n<label><input type=\"checkbox\" name=\"checkbox[]\" value=\"1\" data-price=\"200\" data-key=\"strawberry\">\u3044\u3061\u3054<\/label>\r\n<label><input type=\"checkbox\" name=\"checkbox[]\" value=\"2\" data-price=\"300\" data-key=\"grape\">\u3076\u3069\u3046<\/label><\/pre>\n\u9078\u629e\u3057\u305f\u9805\u76ee\u306e\u5024\u3092\u53d6\u5f97<\/h3>\n
\/\/\u30eb\u30fc\u30d7\u51e6\u7406\r\n$('[name=\"checkbox[]\"]:checked').each(function(index, element){\r\n \/\/\u5024\u306e\u53d6\u5f97\r\n const checkbox = $(element).val();\r\n \/\/\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u5c5e\u6027\u306e\u53d6\u5f97\r\n const price = $(element).data('price');\r\n const key = $(element).data('key');\r\n});<\/pre>\n\u4efb\u610f\u306e\u9805\u76ee\u3092\u9078\u629e(value\u3067\u6307\u5b9a)<\/h3>\n
\/\/1\u3064\u3060\u3051\u9078\u629e\u3059\u308b\u5834\u5408\r\n$('input:checkbox[name=\"checkbox[]\"]').val(['0']);\r\n\/\/\u8907\u6570\u9078\u629e\u3059\u308b\u5834\u5408\r\n$('input:checkbox[name=\"checkbox[]\"]').val(['0', '1']);\r\n\/\/\u5168\u3066\u9078\u629e\u3059\u308b\u5834\u5408\r\n$('input[name=\"checkbox[]\"]').prop('checked', true);<\/pre>\n\u4efb\u610f\u306e\u9805\u76ee\u3092\u9078\u629e(n\u756a\u76ee\u3067\u6307\u5b9a)<\/h3>\n
$(`input[name=\"checkbox[]\"]:eq(0)`).attr(`checked`, true);<\/pre>\n\u30c1\u30a7\u30c3\u30af\u3092\u5916\u3059<\/h3>\n
\/\/\u7279\u5b9a\u306e\u30c1\u30a7\u30c3\u30af\u30dc\u30c3\u30af\u30b9\u306e\u307f\u89e3\u9664\u3059\u308b\u5834\u5408\r\n$('[name=\"checkbox[]\"]:checked').each(function(index, element){\r\n \/\/value\u304c1(\u3044\u3061\u3054)\u306e\u5834\u5408\u306f\u30c1\u30a7\u30c3\u30af\u3092\u89e3\u9664\r\n if( $(element).val() == 1 ){\r\n $(this).prop('checked', false);\r\n }\r\n});\r\n\/\/\u5168\u3066\u89e3\u9664\u3059\u308b\u5834\u5408\r\n$('input[name=\"checkbox[]\"]').prop('checked', false);<\/pre>\n\u30d0\u30ea\u30c7\u30fc\u30c8(\u672a\u9078\u629e\u30c1\u30a7\u30c3\u30af)<\/h3>\n
if( !$('[name=\"checkbox[]\"]:checked').length ){\r\n alert('\u9078\u629e\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002');\r\n return false;\r\n}<\/pre>\n\u7279\u5b9a\u306e\u30c1\u30a7\u30c3\u30af\u30dc\u30c3\u30af\u30b9\u304c\u30c1\u30a7\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d<\/h3>\n
const checked = $(`\u30bb\u30ec\u30af\u30bf`).prop(`checked`); \/\/true or false<\/pre>\n<\/p>\n
\u305d\u306e\u4ed6<\/h2>\n
\u5024\u53d6\u5f97\u6642\u306f\u578b\u306b\u6ce8\u610f\u3059\u308b<\/h3>\n
\u30c6\u30ad\u30b9\u30c8\u30dc\u30c3\u30af\u30b9\u306b\u6570\u5024\u3092\u5165\u529b\u3057\u3066\u3082\u3089\u3044\u5408\u8a08\u91d1\u984d\u8a08\u7b97\u30dc\u30bf\u30f3\u306e\u3088\u3046\u306a\u3082\u306e\u3092\u62bc\u3059\u3068\u300c\u5165\u529b\u3057\u305f\u6570\u5024+\u4e88\u3081\u8a2d\u5b9a\u3057\u3066\u3042\u308b\u624b\u6570\u6599\u300d\u306e\u5408\u8a08\u5024\u3092\u8868\u793a\u3055\u305b\u308b\u898b\u7a4d\u30b7\u30b9\u30c6\u30e0\u307f\u305f\u3044\u306a\u3082\u306e\u3092\u4f5c\u308b\u5834\u5408\u306b\u6ce8\u610f\u3057\u305f\u3044\u306e\u304c\u3001jQuery\u3067value\u3084\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u5c5e\u6027\u306e\u5024\u3092\u53d6\u5f97\u3059\u308b\u3068\u6587\u5b57\u5217\u3068\u3057\u3066\u5224\u5b9a\u3055\u308c\u308b\u70b9\u3002\u4f8b\u3048\u3070\u30c6\u30ad\u30b9\u30c8\u30dc\u30c3\u30af\u30b9\u306b\u300c1000\u300d\u3092\u5165\u529b\u3001\u624b\u6570\u6599\u304c\u300c500\u300d\u3060\u3063\u305f\u5834\u5408\u306f\u300c1000500\u300d\u304c\u8868\u793a\u3055\u308c\u308b\u3002\u305d\u306e\u70ba\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u578b\u5909\u63db\u3092\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n
\/\/\u30c6\u30ad\u30b9\u30c8\u30dc\u30c3\u30af\u30b9\u306e\u5024\u3092\u53d6\u5f97\r\nconst text_box = $('#text_box').val();\r\n\r\n\/\/\u624b\u6570\u6599\u3092\u8a2d\u5b9a\r\nconst commission = 500;\r\n\r\n\/\/\u30c6\u30ad\u30b9\u30c8\u30dc\u30c3\u30af\u30b9\u306e\u5024\u3092\u6570\u5024\u578b\u306b\u5909\u66f4\u3057\u3066\u8a08\u7b97\r\nconst total = Number(text_box) + commission;<\/pre>\n<\/p>\n
\u6240\u611f<\/h2>\n
\u4e00\u901a\u308a\u307e\u3068\u3081\u305f\u306e\u3067\u4eca\u5f8c\u306f\u691c\u7d22\u3057\u306a\u304f\u3066\u3082\u5927\u4e08\u592b\u306a\u7b48\u3002\u65b0\u305f\u306b\u30d5\u30a9\u30fc\u30e0&jQuery\u95a2\u9023\u3067\u308f\u304b\u3089\u306a\u3044\u3053\u3068\u304c\u51fa\u3066\u304d\u305f\u3089\u672c\u8a18\u4e8b\u306b\u8ffd\u8a18\u3057\u3066\u3044\u304f\u3002\u5f8c\u306f\u30d5\u30a9\u30fc\u30e0\u3068\u304b\u306e\u30d0\u30ea\u30c7\u30fc\u30c8\u6642\u306b\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u5f62\u5f0f\u30c1\u30a7\u30c3\u30af\u7b49\u306e\u6b63\u898f\u8868\u73fe\u95a2\u9023\u3082\u6bce\u56deGoogle\u691c\u7d22\u3057\u3066\u3044\u308b\u306e\u3067\u305d\u306e\u8fba\u308a\u3082\u307e\u3068\u3081\u3066\u304a\u304d\u305f\u3044\u3068\u3053\u308d\u3002<\/p>\n
<\/p>\n
\u53c2\u8003\u30b5\u30a4\u30c8<\/h2>\n