{"id":7110,"date":"2022-12-23T08:58:32","date_gmt":"2022-12-22T23:58:32","guid":{"rendered":"https:\/\/www.sria.co.jp\/blog\/?p=7110"},"modified":"2022-12-23T08:58:32","modified_gmt":"2022-12-22T23:58:32","slug":"7110","status":"publish","type":"post","link":"https:\/\/www.sria.co.jp\/blog\/2022\/12\/7110\/","title":{"rendered":"Mutation Observer\u3067\u76e3\u8996\u3067\u304d\u308b\u3082\u306e \u3010JavaScript\u3011"},"content":{"rendered":"
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DOM\u3092\u76e3\u8996\u3057\u3066\u5909\u5316\u304c\u3042\u3063\u305f\u5834\u5408\u306b\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u547c\u3073\u51fa\u305b\u308bMutationObserver\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066<\/span><\/div>\n
\u9593\u9055\u3063\u305f\u8a8d\u8b58\u3092\u3057\u3066\u3044\u305f\u306e\u3067\u3001<\/span>\u81ea\u5206\u306e\u53cd\u7701\u3084\u540c\u3058\u9593\u9055\u3044\u3092\u3057\u3066\u3044\u3066\u539f\u56e0\u3092\u63a2\u3063\u3066\u3044\u308b\u4eba\u306b\u5411\u3051\u3066\u3053\u306e\u8a18\u4e8b\u3092\u66f8\u304d\u307e\u3059\u3002<\/span><\/div>\n<\/div>\n
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\u9593\u9055\u3044\u306b\u6c17\u3065\u3044\u305f\u304d\u3063\u304b\u3051<\/span><\/h3>\n
\u6b21\u306e\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/span><\/div>\n<\/div>\n
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<!DOCTYPE html>\n<html lang=\"ja\">\n<head>\n    <meta charset=\"UTF-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <title>Mutation observer\u306e\u9593\u9055\u3063\u305f\u4f7f\u3044\u65b9<\/title>\n    <script src=\"https:\/\/code.jquery.com\/jquery-3.6.3.min.js\"><\/script>\n    <script src=\".\/script.js\"><\/script>\n<\/head>\n<body>\n    <main>\n        <dl>\n            <dt>\u6587\u5b57\u6570\u3092\u6570\u3048\u305f\u3044\u6587\u5b57\u5217<\/dt>\n            <dd>\n                <input type=\"text\" id=\"TextToBeChecked\">\n            <\/dd>\n            <dt>\u6587\u5b57\u6570<\/dt>\n            <dd>\n                <p id=\"StringLength\"><\/p>\n            <\/dd>\n        <\/dl>   \n    <\/main>\n<\/body>\n<\/html><\/pre>\n
$(function(){\n    let observer = new MutationObserver(function(){\n        const stringLength = $(\"#TextToBeChecked\").length;\n        $(\"#StringLength\").text(stringLength + \"\u6587\u5b57\");\n    });\n    observer.observe(document.getElementById(\"TextToBeChecked\"), {\n        attributes: true,\n        characterData: true\n    });\n});\n<\/pre>\n
 <\/p>\n<\/div>\n
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\u5b9f\u73fe\u3057\u305f\u3044\u3053\u3068\u306f\u3001\u30c6\u30ad\u30b9\u30c8\u30a4\u30f3\u30d7\u30c3\u30c8\u306e\u5024\u304c\u5909\u308f\u3063\u305f\u6642\u306b\u305d\u306e\u6587\u5b57\u5217\u306e\u30ab\u30a6\u30f3\u30c8\u306a\u3069\u4f55\u304b\u3057\u3089\u306e\u51e6\u7406\u3092\u884c\u3046\u3053\u3068\u3067\u3059\u3002 \u00a0<\/span><\/div>\n
\u3053\u3053\u3067\u306f\u5909\u5316\u306e\u691c\u77e5\u306e\u305f\u3081\u306bMutation Observer\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u3053\u308c\u3067\u306f\u52d5\u304d\u307e\u305b\u3093\u3002<\/span><\/div>\n
\u306a\u305c\u306a\u3089Mutation Observer\u306f<\/span>\u5c5e\u6027\u306e\u5909\u5316\u3092\u691c\u77e5\u3059\u308b\u3082\u306e\u3067\u3042\u308a\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5909\u5316\u3092\u691c\u77e5\u3059\u308b\u3082\u306e\u3067\u306f\u306a\u3044<\/strong><\/span>\u304b\u3089\u3067\u3059\u3002<\/span><\/div>\n<\/div>\n
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\u5c5e\u6027\u3068\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u9055\u3044<\/span><\/h3>\n
\u4e0a\u306e\u3088\u3046\u306a\u9593\u9055\u3063\u305f\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3057\u307e\u3063\u305f\u306e\u306f\u5c5e\u6027\u3068\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u533a\u5225\u3067\u304d\u3066\u3044\u306a\u3063\u305f\u306e\u304c\u539f\u56e0\u3067\u3059\u3002<\/span><\/div>\n
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\u5c5e\u6027\u3068\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u306f\u305d\u308c\u305e\u308c\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002<\/span><\/p>\n
 <\/p>\n<\/div>\n
\u5c5e\u6027:
\nHTML\u8981\u7d20\u3092\u8a18\u8ff0\u3059\u308b\u3068\u304d\u306b\u4ed8\u52a0\u3059\u308b\u3082\u306e\u3002\u4e0a\u306eHTML\u3067\u6587\u5b57\u5217\u3092\u5165\u529b\u3059\u308b\u306e\u306b\u4f7f\u3063\u305finput\u8981\u7d20\u306b\u304a\u3044\u3066\u306ftype\u3084id\u304c\u8a72\u5f53\u3059\u308b\u3002\u30d7\u30ed\u30d1\u30c6\u30a3:
\n\u8a18\u8ff0\u3057\u305fHTML\u3092\u89e3\u6790\u3057\u3066\u4f5c\u3089\u308c\u305fDOM\u30ce\u30fc\u30c9\u304c\u6301\u3064\u3082\u306e\u3002#TextToBeChecked\u306b\u5bfe\u5fdc\u3059\u308bDOM (document.getElementById(“TextToBeChecked”)) \u304c\u6301\u3064\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u306fvalue\u3084addEventListener\u3001prepend\u3001innerHTML\u306a\u3069\u304c\u3042\u308b\u3002<\/div>\n
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 <\/p>\n<\/div>\n
\u30c6\u30ad\u30b9\u30c8\u30a4\u30f3\u30d7\u30c3\u30c8\u306e\u4e2d\u8eab\u304c\u5909\u308f\u3063\u305f\u6642\u3001\u305d\u308c\u306f\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5909\u5316\u3067\u3059\u304c\u5c5e\u6027\u306e\u5909\u5316\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/div>\n
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\u6545\u306bMutation Observer\u306f\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u547c\u3073\u51fa\u3057\u307e\u305b\u3093\u3002<\/span><\/div>\n<\/div>\n
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\u7d50\u8ad6<\/span><\/h3>\n
Mutation Observer\u3067\u306fHTML\u8981\u7d20\u306e\u5c5e\u6027\u306e\u5909\u5316\u3092\u76e3\u8996\u3057\u307e\u3059\u304c\u3001DOM\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u30fc\u306e\u5909\u5316\u306f\u76e3\u8996\u3057\u307e\u305b\u3093\u3002 \u00a0<\/span><\/div>\n
\u3082\u3057DOM\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u30fc\u306e\u5909\u5316\u306f\u76e3\u8996\u3057\u305f\u3044\u5834\u5408\u306f\u3001setTimeout\u3092\u4f7f\u3063\u3066\u5b9a\u671f\u7684\u306b\u5024\u3092\u8abf\u3079\u3066\u5909\u5316\u304c\u3042\u3063\u305f\u5834\u5408\u306b\u4f55\u304b\u3057\u3089\u306e\u51e6\u7406\u3092\u884c\u3046\u306a\u3069\u306e\u5b9f\u88c5\u3092\u3059\u3079\u304d\u3067\u3057\u3087\u3046\u3002<\/span><\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
DOM\u3092\u76e3\u8996\u3057\u3066\u5909\u5316\u304c\u3042\u3063\u305f\u5834\u5408\u306b\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u547c\u3073\u51fa\u305b\u308bMutationObserver\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066 \u9593\u9055\u3063\u305f\u8a8d\u8b58\u3092\u3057\u3066\u3044\u305f\u306e\u3067\u3001\u81ea\u5206\u306e\u53cd\u7701\u3084\u540c\u3058\u9593\u9055\u3044\u3092\u3057\u3066\u3044\u3066\u539f\u56e0\u3092\u63a2\u3063\u3066\u3044\u308b\u4eba\u306b\u5411\u3051\u3066\u3053\u306e\u8a18\u4e8b\u3092\u66f8\u304d…<\/p>\n","protected":false},"author":26,"featured_media":7127,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[14,8],"tags":[],"_links":{"self":[{"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/posts\/7110"}],"collection":[{"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/users\/26"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/comments?post=7110"}],"version-history":[{"count":13,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/posts\/7110\/revisions"}],"predecessor-version":[{"id":7151,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/posts\/7110\/revisions\/7151"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/media\/7127"}],"wp:attachment":[{"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/media?parent=7110"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/categories?post=7110"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sria.co.jp\/blog\/wp-json\/wp\/v2\/tags?post=7110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}