{"id":4239,"date":"2013-02-07T02:21:47","date_gmt":"2013-02-06T17:21:47","guid":{"rendered":"http:\/\/www.webcyou.com\/?p=4239"},"modified":"2013-02-08T02:35:22","modified_gmt":"2013-02-07T17:35:22","slug":"javascript-queryselector%e3%80%81queryselectorall","status":"publish","type":"post","link":"https:\/\/www.webcyou.com\/?p=4239","title":{"rendered":"Javascript querySelector\u3001querySelectorAll"},"content":{"rendered":"

document.querySelector<\/h4>\n

\u6982\u8981<\/strong><\/p>\n

\u4e0e\u3048\u3089\u308c\u305f\u30af\u30e9\u30b9\u306e\u6700\u521d\u306e\u8981\u7d20\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n

element = document.querySelector( selectors );<\/pre>\n<\/p>\n<\/p>\n
element<\/code>\u00a0\u306f\u00a0element\u00a0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n
\u4f8b\uff1a<\/strong><\/p>\n
var el = document.querySelector(\".myClass\");<\/pre>\n<\/p>\n<\/p>\n
\u8907\u6570\u540c\u3058\u30af\u30e9\u30b9\u304c\u5b58\u5728\u3057\u3066\u3082\u8fd4\u3063\u3066\u304f\u308b\u8981\u7d20\u306f\u6700\u521d\u306e\u8981\u7d20\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u3088\u304f\u9593\u9055\u3048\u308b\u306e\u304c\u00a0querySelecter<\/strong>\u3068\u8a18\u8ff0\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3002\u3002\u6b63\u3057\u304f\u306f\u00a0querySelector<\/strong> \u3068\u306a\u308a\u307e\u3059\u3002\uff08\u9593\u9055\u3048\u306a\u3044\uff1f\uff09<\/p>\n
\u5358\u767a\u3067\u30af\u30e9\u30b9\u3092\u53d6\u5f97\u3059\u308b\u5834\u5408\u306fgetElementsByClassName()\u3092\u5229\u7528\u3057\u305f\u65b9\u304c\u9ad8\u901f\u3068\u8a18\u3055\u308c\u307e\u3059\u3002<\/p>\n
\u307e\u305f\u3001\u4e00\u3064\u3057\u304b\u306a\u3044\u5834\u5408\u306f\u30af\u30e9\u30b9\u306e\u6307\u5b9a\u3067\u306f\u306a\u304fid\u3092\u7528\u3044\u3066getElementsById()\u3092\u5229\u7528\u3057\u53d6\u5f97\u3057\u305f\u65b9\u304c\u3088\u308a\u51e6\u7406\u304c\u9ad8\u901f\u3068\u8a00\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u53c2\u8003URL<\/strong><\/p>\n
https:\/\/developer.mozilla.org\/ja\/docs\/DOM\/Document.querySelector<\/a><\/p>\n
\u5bfe\u5fdc\u30d6\u30e9\u30a6\u30b6<\/strong><\/p>\n\n\n\n\n
Chrome<\/td>\nFirefox (Gecko)<\/td>\nInternet Explorer<\/td>\nOpera<\/td>\nSafari (WebKit)<\/td>\n<\/tr>\n
1<\/td>\n3.5 (1.9.1)<\/td>\n8<\/td>\n10<\/td>\n3.2 (525.3)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
document.querySelectorAll<\/h4>\n
\u6982\u8981<\/p>\n
\u30bb\u30ec\u30af\u30bf\u30fc\u306e\u6307\u5b9a\u3055\u308c\u305f\u30b0\u30eb\u30fc\u30d7\u3068\u4e00\u81f4\u3059\u308b\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u5185\u306e\u8981\u7d20\u306e\u30ea\u30b9\u30c8\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
\u8fd4\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306fNodeList\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
elementList = document.querySelectorAll(selectors);<\/pre>\n<\/p>\n
\u8fd4\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306fNodeList\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u4f8b\uff1a<\/strong><\/p>\n
var matches = document.querySelectorAll( \"div.hoge, div.text\");<\/pre>\n<\/p>\n
querySelector\u3068\u306e\u9055\u3044\u306f\u3001\u8fd4\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306fNodeList\u3068\u306a\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n
\u53d6\u5f97\u306b\u95a2\u3057\u3066\u306f\u3001CSS\u3067\u5229\u7528\u3057\u3066\u3044\u308b\u30bb\u30ec\u30af\u30bf\u306b\u3088\u308b\u6307\u5b9a\u3082\u304a\u3053\u306a\u3048\u307e\u3059\u3002<\/p>\n
\u4f8b\uff1a<\/strong><\/p>\n
elements = document.querySelectorAll("div > p.hoge > a");<\/pre>\n<\/p>\n
\u307e\u305f\u3001\u914d\u5217\u3068\u3057\u3066\u683c\u7d0d\u3055\u308c\u307e\u3059\u306e\u3067\u3001\u6307\u5b9a\u3059\u308b\u5834\u5408\u306f<\/p>\n
matches[0].addEventListener(\"click\",hoge,false);<\/pre>\n
 <\/p>\n
\u306a\u3069\u914d\u5217\u3067\u306e\u6307\u5b9a\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u53c2\u8003URL<\/strong><\/p>\n
https:\/\/developer.mozilla.org\/ja\/docs\/DOM\/Document.querySelectorAll<\/a><\/p>\n\n\n\n\n
Chrome<\/td>\nFirefox (Gecko)<\/td>\nInternet Explorer<\/td>\nOpera<\/td>\nSafari (WebKit)<\/td>\n<\/tr>\n
1<\/td>\n3.5 (1.9.1)<\/td>\n9<\/td>\n10<\/td>\n3.2 (525.3)<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"
document.querySelector \u6982\u8981 \u4e0e\u3048\u3089\u308c\u305f\u30af\u30e9\u30b9\u306e\u6700\u521d\u306e\u8981\u7d20\u3092\u8fd4\u3057\u307e\u3059\u3002 element = document.querySelector( selectors ); element\u00a0\u306f\u00a0elemen […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[166,37,47,46],"class_list":["post-4239","post","type-post","status-publish","format-standard","hentry","category-javascript","tag-iphone","tag-iphone-","tag-javascript-2","tag-js"],"_links":{"self":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts\/4239","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4239"}],"version-history":[{"count":8,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts\/4239\/revisions"}],"predecessor-version":[{"id":4248,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts\/4239\/revisions\/4248"}],"wp:attachment":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4239"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4239"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4239"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}