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\u73fe\u8c61\uff1adocument.getElementById(“dia”).innerHTML = hoge;<\/p>\n
\u3067\uff0cJavaScript\u306e\u66f8\u304d\u65b9\u3067\u53cd\u6620\u3055\u308c\u306a\u3044\u3068\u304d\u304c\u3042\u308b\uff0e<\/p>\n
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TypeError: document.getElementById(…) is null<\/em><\/p>\n \u3067\uff0c\u3053\u306e\u610f\u5473\u306f\u3069\u3046\u3084\u3089<\/p>\n \u300c\u304a\u307e\u3048\uff0c\u305d\u3093\u306aID\u7121\u3044\u3088\u30dc\u30b1\uff01\uff01\u300d<\/strong><\/p>\n \u307f\u305f\u3044\uff0e<\/p>\n \u3067\u3082HTML\u4e0a\u306b\u306f\u3061\u3083\u3093\u3068\uff0c<\/p>\n <div.time id=”dia”><p>aaa<\/p><\/div><\/p>\n \u304c\u3042\u308a\u307e\u3059\uff0e<\/p>\n \u3067\uff0c3\u65e5\u9593\u3044\u308d\u3044\u308d\u306a\u30b5\u30a4\u30c8\u3092\u5f53\u305f\u308a\u307e\u3057\u305f\u304c\uff0c\u3069\u3046\u3082\u5b9f\u884c\u9806\u306e\u554f\u984c\u306e\u3088\u3046\u3067\u3059\uff0e<\/p>\n HTML\u66f8\u985e\u306f\u884c\u306e\u4e0a\u304b\u3089\u5b9f\u884c\u3055\u308c\u307e\u3059\u304c\uff0cHTML\u306e\u6700\u5f8c\u306b\u66f8\u304b\u308c\u3066\u3044\u308b<DIV>\u30bf\u30b0\u3092\u8aad\u307f\u8fbc\u3080\u524d\u306bID\u691c\u7d22\u3057\u3088\u3046\u3068\u3057\u3066\uff0c\u7121\u3044\u3068\u8a00\u308f\u308c\u308b\u307f\u305f\u3044\uff0e<\/p>\n \u89e3\u6c7a\u65b9\u6cd5\u306f\uff0cHTML\u5168\u90e8\u8aad\u307f\u8fbc\u3093\u3060\u5f8c\u306bID\u691c\u7d22\u3059\u308c\u3070\u3044\u3044\u3058\u3083\u3093\uff01\u3063\u3066\u3053\u3068\u306a\u3093\u3067\u3059\u304c\uff0c\u3053\u3053\u306b\u3082\u7f60\u304c\uff0e<\/p>\n <\/script>\u306e\u76f4\u524d\u306bgetDocument~\u304c\u5165\u3063\u3066\u3044\u308bfucnction\u306eshowTime()\u3092\u5b9f\u884c\u3055\u305b\u3088\u3046\u3068\uff0c<\/p>\n window.onload=showTime();<\/em><\/p>\n \u3068\u66f8\u3044\u3066\u3082\u30a8\u30e9\u30fc\u304c\uff0e<\/p>\n \u4f55\u3067\u3082\uff0c\u3053\u306e\u5834\u5408\u306f<\/p>\n window.onload=showTime;<\/strong><\/em><\/p>\n \u3068()\u7121\u3057<\/strong>\u3067\u5b9f\u884c\u3059\u308b\u3089\u3057\u3044\uff0e<\/p>\n \u306f\u3041\u301c\uff1f\u4f55\u3067\u3057\u3087\u3053\u308c\uff1f<\/p>\n ()\u3092\u3064\u3051\u308b\u3068\u95a2\u6570\u3092\u5b9f\u884c\uff0c()\u3092\u3064\u3051\u306a\u3044\u3068\u95a2\u6570\u3092\u53c2\u7167\u3068\u3044\u3046\u610f\u5473\u3089\u3057\u3044\u3067\u3059\u304c\uff0c\uff0c\u898b\u306b\u884c\u304f\u3063\u3066\uff0c\uff0c\u306d\u3047<\/p>\n \u3067\u3082\u3053\u308c\u3067\u3046\u307e\u304f\u884c\u304d\u305d\u3046\uff0e<\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" 3\u65e5\u3044\u308d\u3044\u308d\u306a\u30b5\u30a4\u30c8\u3092\u3042\u305f\u3063\u3066\u3088\u3046\u3084\u304f\u89e3\u6c7a\uff0e \u73fe\u8c61\uff1adocument.getElementById(“dia”).innerHTML = hoge; \u3067\uff0cJavaScript\u306e\u66f8\u304d\u65b9\u3067\u53cd\u6620\u3055\u308c\u306a\u3044 … \u7d9a\u304d\u3092\u8aad\u3080 document.getElementById\u3067null\u306e\u30a8\u30e9\u30fc<\/span>