{"id":11700,"date":"2025-05-23T00:13:39","date_gmt":"2025-05-22T16:13:39","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=11700"},"modified":"2025-05-23T00:14:40","modified_gmt":"2025-05-22T16:14:40","slug":"input-value-valueasnumber","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2025\/05\/input-value-valueasnumber\/","title":{"rendered":"\u4f60\u77e5\u9053\u5417\uff0c\u8f93\u5165\u6846\u7684value\u503c\u4e5f\u80fd\u76f4\u63a5\u8fd4\u56de\u6570\u503c\u7c7b\u578b"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=11700\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=11700<\/a><br \/>\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u4f46\u9700\u8981\u4fdd\u7559\u539f\u4f5c\u8005\u3001\u51fa\u5904\u4ee5\u53ca\u6587\u4e2d\u94fe\u63a5\uff0cAI\u6293\u53d6\u4fdd\u7559\u539f\u6587\u5730\u5740\uff0c\u4efb\u4f55\u7f51\u7ad9\u5747\u53ef\u6458\u8981\u805a\u5408\uff0c\u5546\u7528\u8bf7\u8054\u7cfb\u6388\u6743\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202505\/2025-5-23_001122.png\" width=\"344\" height=\"227\" alt=\"\u6807\u9898\u5360\u4f4d\u7b26\uff0c\u53ef\u4ee5\u662f\u975e\u5b57\u7b26\u4e32\u5417\" class=\"alignright clip thumb size-medium\" \/><\/p>\n<h3>\u4e00\u3001\u76f4\u63a5\u6b63\u9898-valueAsNumber<\/h3>\n<p>\u6211\u4e5f\u662f\u6700\u8fd1\u624d\u77e5\u9053\uff0c\u539f\u6765DOM\u5bf9\u8c61\u83b7\u53d6\u5c5e\u6027\u503c\uff0c\u4e0d\u662f\u90fd\u662f\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u8fd8\u53ef\u4ee5\u662f\u6570\u503c\u7c7b\u578b\u3002<\/p>\n<p>\u5df2\u77e5\u8f93\u5165\u6846\u5143\u7d20\uff1a <\/p>\n<pre>&lt;input id=\"number\" min=\"1\" max=\"10\" type=\"number\" \/&gt;<\/pre>\n<p>\u5e73\u5e38\u6211\u4eec\u83b7\u53d6\u8f93\u5165\u6846\u7684\u503c\u90fd\u662f\u4f7f\u7528 <code>number.value<\/code> \u83b7\u53d6\u7684\uff0c\u4f46\u662f\u8fd9\u4e2a\u5c5e\u6027\u7684\u8fd4\u56de\u503c\u662f\u4e2a\u5b57\u7b26\u4e32\u3002<\/p>\n<p>\u5176\u5b9e\u73b0\u5728\u6d4f\u89c8\u5668\u652f\u6301\u76f4\u63a5\u8fd4\u56de\u6570\u503c\u7c7b\u578b\u7684\uff0c\u4f7f\u7528<code>number.valueAsNumber<\/code>\u5373\u53ef\u3002<\/p>\n<h4>\u5b9e\u5730\u6f14\u793a<\/h4>\n<p>\u773c\u89c1\u4e3a\u5b9e\uff0c\u6211\u4eec\u5b9e\u5730\u6d4b\u8bd5\u4e0b\uff0c\u4f8b\u5982typeof\u4e0b<code>number.valueAsNumber<\/code>\u7684\u8fd4\u56de\u503c\u7c7b\u578b\uff0c\u770b\u770b\u8fd4\u56de\u7684\u662fstring\u8fd8\u662fnumber.<\/p>\n<pre>output.textContent = typeof number.valueAsNumber;<\/pre>\n<p>\u6bd4\u65b9\u8bf4\u6709\u4e0b\u9762\u4e00\u4e2a\u6570\u503c\u8f93\u5165\u6846\uff1a<\/p>\n<div style=\"width:fit-content;padding:12px;border:1px solid #ccc;\">\n<p><input id=\"number\" min=\"1\" max=\"10\" value=\"5\" type=\"number\" \/> <button onclick=\"valType1.textContent=typeof number.valueAsNumber;\">valueAsNumber\u503c\u7c7b\u578b\u662f\uff1f<\/button><\/p>\n<p>\u7ed3\u679c\u662f\uff1a<output id=\"valType1\" style=\"color:red;font-size:112.5%;\">?<\/output><\/p>\n<\/div>\n<p>\u70b9\u51fb\u4e0a\u9762\u7684\u6309\u94ae\uff0c\u53ef\u4ee5\u770b\u5230\u8f93\u51fa\u7684\u7ed3\u679c\u662f&#8217;number&#8217;\u3002<\/p>\n<h4>\u5982\u679c\u662f\u666e\u901a\u8f93\u5165\u6846\uff1f<\/h4>\n<p>\u6211\u4eec\u4e0d\u59a8\u62ff<code>&lt;textarea&gt;<\/code>\u5143\u7d20\u6d4b\u8bd5\u4e0b\uff0c\u6d4b\u8bd5\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre>&lt;textarea id=\"textarea\" cols=\"30\" rows=\"4\"&gt;10&lt;\/textarea&gt;\r\n&lt;button onclick=\"console.log(textarea.valueAsNumber);\"&gt;\u70b9\u51fb\u6211&lt;\/button&gt;<\/pre>\n<p>\u7ed3\u679c\u662f <code>undefined<\/code>\u3002<\/p>\n<p>\u8bf4\u660e<code>valueAsNumber<\/code>\u5c5e\u6027\u8fd4\u56de\u6570\u503c\u4e0d\u80fd\u662f\u666e\u901a\u7684\u8f93\u5165\u6846\u5143\u7d20\u3002<\/p>\n<h3>\u4e8c\u3001valueAsDate\u5c5e\u6027\u7c7b\u4f3c<\/h3>\n<p>\u9664\u4e86<code>valueAsNumber<\/code>\uff0c\u8fd8\u6709<code>valueAsDate<\/code>\u5c5e\u6027\uff0c\u8fd9\u4e2a\u662f\u7528\u5728<code>date<\/code>\u7b49\u4e0e\u65e5\u671f\u76f8\u5173\u7c7b\u578b\u7684\u8f93\u5165\u6846\u4e0a\u7684\u3002<\/p>\n<p>\u8fd4\u56de\u7684\u662fDate\u5bf9\u8c61\u3002<\/p>\n<p>\u4f8b\u5982\u4e0b\u9762\u7684\u5b9e\u65f6\u6e32\u67d3\u6d4b\u8bd5\uff0c\u70b9\u51fb\u6309\u94ae\uff0c\u53ef\u4ee5\u770b\u5230\u8fd4\u56de\u503c\u7c7b\u578b\uff1a<\/p>\n<div style=\"width:fit-content;padding:12px;border:1px solid #ccc;\">\n<p><input id=\"date\" value=\"2025-05-22\" type=\"date\" \/> <button onclick=\"valType2.textContent=typeof date.valueAsDate;\">valueAsDate\u503c\u7c7b\u578b\u662f\uff1f<\/button><\/p>\n<p>\u7ed3\u679c\u662f\uff1a<output id=\"valType2\" style=\"color:red;font-size:112.5%;\">?<\/output><\/p>\n<\/div>\n<h4>\u4e0d\u662f\u6240\u6709\u65e5\u671f\u7c7b\u578b\u90fd\u652f\u6301<\/h4>\n<p><code>month<\/code>, <code>date<\/code>, \u4ee5\u53ca <code>week<\/code>\u8fd9\u51e0\u4e2a\u7c7b\u578b\u7684\u65f6\u95f4\u9009\u62e9\u8f93\u5165\u6846\u662f\u652f\u6301valueAsDate\u7684\uff0c\u4f46\u662f<code>datetime-local<\/code>\u8f93\u5165\u6846\u7c7b\u578b\u5e76\u4e0d\u652f\u6301\uff0c\u56e0\u4e3a\u5b83\u8868\u793a\u672c\u5730\u65f6\u533a\u4e2d\u7684\u65e5\u671f\u548c\u65f6\u95f4\uff08\u6302\u949f\u65f6\u95f4\uff09\uff0c\u4f46date\u5bf9\u8c61\u8868\u793a\u7edd\u5bf9\u65f6\u95f4\u70b9\u3002\u7136\u800c\uff0c\u4e00\u4e9b\u6d4f\u89c8\u5668\u53ef\u80fd\u63d0\u4f9b\u975e\u6807\u51c6\u5b9e\u73b0\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u6211Mac Chrome\u4e0b\u6d4b\u8bd5\uff0c\u8fd4\u56de\u7684\u5c31\u662f <code>null<\/code>\uff0c\u4e0d\u652f\u6301\u8bc6\u522b\u3002<\/p>\n<pre>&lt;input id=\"datetime\" type=\"datetime-local\"&gt;\r\n&lt;button onclick=\"console.log(datetime.valueAsDate);\"&gt;\u70b9\u51fb\u6211&lt;\/button&gt;<\/pre>\n<p>\u4f46\u662f\uff0c\u5f88\u6709\u610f\u601d\u7684\uff0c\u6211\u8f93\u51fa<code>datetime.valueAsNumber<\/code>\u53cd\u800c\u6709\u503c\uff0c\u8fd4\u56de\u7684\u662f\u5f53\u524d\u7684\u65f6\u95f4\u6233\uff0c\u4f8b\u5982\u4e0b\u9762\u7684\u5b9e\u65f6\u6e32\u67d3\u6d4b\u8bd5\uff08\u9009\u62e9\u4e00\u4e2a\u65f6\u95f4\uff0c\u7136\u540e\u70b9\u51fb\u6309\u94ae\uff09\uff1a<\/p>\n<div style=\"width:fit-content;padding:12px;border:1px solid #ccc;\">\n<p><input id=\"datetime\" type=\"datetime-local\"> <button onclick=\"valdate.textContent=datetime.valueAsNumber;\">valueAsNumber\u503c\u662f\uff1f<\/button><\/p>\n<p>\u7ed3\u679c\u662f\uff1a<output id=\"valdate\" style=\"color:red;font-size:112.5%;\">?<\/output><\/p>\n<\/div>\n<p>\u8fd8\u633a\u6709\u610f\u601d\u7684\uff0c\u6211\u6d4b\u8bd5\u4e86tel\u7c7b\u578b\uff0c\u8fd4\u56de\u7684\u662fNaN\uff0c<code>range<\/code>\u7c7b\u578b\u53ef\u4ee5\uff0c\u4e5f\u5c31\u662f\u652f\u6301<code>min<\/code>\/<code>max<\/code>\/<code>step<\/code>\u8fd9\u79cd\u6570\u503c\u8303\u56f4\u8ba1\u7b97\u7684\u8f93\u5165\u6846\u662f\u652f\u6301valueAsNumber\u7684\u3002<\/p>\n<h3>\u4e09\u3001\u7ed3\u675f\u8bed<\/h3>\n<p>\u6211\u770b\u4e86\u4e0b\u8fd9\u4e24\u4e2aDOM\u5c5e\u6027\u7684\u517c\u5bb9\u6027\uff0cChrome 5\u5c31\u5f00\u59cb\u652f\u6301\u4e86\uff0c\u770b\u6765Web\u9886\u57df\u8fd8\u6709\u5f88\u591a\u6211\u4e0d\u77e5\u9053\u7684\u7ec6\u8282\u77e5\u8bc6\uff0c\u5b66\u65e0\u6b62\u5883\u554a\u3002<\/p>\n<p>\u53ef\u4ee5\u628a\u76f8\u5173\u77e5\u8bc6\u70b9\u5728\u300aHTML\u5e76\u4e0d\u7b80\u5355\u300b\u8fd9\u672c\u4e66\u4e2d\u66f4\u65b0\u4e0b\uff0c\u5927\u5bb6\u8981\u591a\u591a\u652f\u6301\u8fd9\u672c\u4e66\uff0c\u8fd9\u6837\u624d\u4f1a\u6709\u7b2c\u4e8c\u7248\u3002<\/p>\n<p>\u597d\u5427\uff0c\u5c31\u8bf4\u8fd9\u4e48\u591a\uff0c\u53c8\u662f\u5b66\u4e60\u6210\u957f\u7684\u4e00\u5929\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202505\/2025-5-22_161402.jpeg\" width=\"162\" height=\"288\" alt=\"\u6885\u51dd\u538b\u8f74\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u4f1a\u7ecf\u5e38\u66f4\u65b0\u77e5\u8bc6\u70b9\u4ee5\u53ca\u4fee\u6b63\u4e00\u4e9b\u9519\u8bef\uff0c\u56e0\u6b64\u8f6c\u8f7d\u8bf7\u4fdd\u7559\u539f\u51fa\u5904\uff0c\u65b9\u4fbf\u6eaf\u6e90\uff0c\u907f\u514d\u9648\u65e7\u9519\u8bef\u77e5\u8bc6\u7684\u8bef\u5bfc\uff0c\u540c\u65f6\u6709\u66f4\u597d\u7684\u9605\u8bfb\u4f53\u9a8c\u3002<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=11700\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=11700<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202505\/2025-5-23_001122.png\" width=\"160\" height=\"105\" alt=\"\u6807\u9898\u5360\u4f4d\u7b26\uff0c\u53ef\u4ee5\u662f\u975e\u5b57\u7b26\u4e32\u5417\" class=\"alignright size-medium\" loading=\"lazy\" \/><\/p>\n<p>\u6211\u4eca\u5929\u624d\u77e5\u9053\uff0c\u67d0\u4e9b\u7c7b\u578b\u7684\u8f93\u5165\u6846\uff0c\u4f7f\u7528DOM\u5c5e\u6027\u8fd4\u56de\u7684\u503c\u7c7b\u578b\uff0c\u51fa\u4e86\u662f\u5b57\u7b26\u4e32\uff0c\u8fd8\u53ef\u4ee5\u662f\u6570\u503c\uff0c\u4e43\u81f3\u65e5\u671f\u5bf9\u8c61\u7c7b\u578b\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1097],"tags":[1488,37,1706,1603,515,2056],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/11700"}],"collection":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/comments?post=11700"}],"version-history":[{"count":7,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/11700\/revisions"}],"predecessor-version":[{"id":11707,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/11700\/revisions\/11707"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=11700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=11700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=11700"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}