{"id":25584,"date":"2024-11-24T14:50:52","date_gmt":"2024-11-24T06:50:52","guid":{"rendered":"https:\/\/fwq.ai\/blog\/25584\/"},"modified":"2024-11-24T14:50:52","modified_gmt":"2024-11-24T06:50:52","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88num%e5%8f%98%e9%87%8f%e6%97%a0%e6%b3%95%e5%8a%a8%e6%80%81%e5%a2%9e%e5%8a%a0%e6%97%a5%e5%8e%86%e6%9c%88%e4%bb%bd%ef%bc%9f-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/25584\/","title":{"rendered":"\u4e3a\u4ec0\u4e48\u201cnum\u201d\u53d8\u91cf\u65e0\u6cd5\u52a8\u6001\u589e\u52a0\u65e5\u5386\u6708\u4efd\uff1f"},"content":{"rendered":"

\"\u4e3a\u4ec0\u4e48\u201cnum\u201d\u53d8\u91cf\u65e0\u6cd5\u52a8\u6001\u589e\u52a0\u65e5\u5386\u6708\u4efd\uff1f\u63d2\u56fe\"<\/p>\n

\u4e3a\u4ec0\u4e48\u4f7f\u7528\u201cnum\u201d\u53d8\u91cf\u4e0d\u6210\u529f\uff1f<\/strong><\/p>\n

\u95ee\u9898\u63cf\u8ff0\uff1a<\/strong><\/p>\n

\u60a8\u5e0c\u671b\u4f7f\u7528\u201cnum\u201d\u53d8\u91cf\u52a8\u6001\u589e\u52a0\u65e5\u5386\u663e\u793a\u7684\u6708\u4efd\uff0c\u4f46\u9047\u5230\u4e86\u95ee\u9898\uff0c\u5bfc\u81f4\u9875\u9762\u65e0\u6cd5\u6b63\u5e38\u663e\u793a\u65e5\u671f\u3002<\/p>\n

\u539f\u56e0\uff1a<\/strong><\/p>\n

\u521d\u59cb\u5316\u6267\u884c\u65f6\uff0c\u201cnum\u201d\u53d8\u91cf\u672a\u5b9a\u4e49\uff08undefined\uff09<\/strong>\uff0c\u4ece\u800c\u5bfc\u81f4\u201cmonth_now + 1 + num\u201d\u7684\u7ed3\u679c\u4e3a\u975e\u6570\u503c\uff08NaN\uff09\u3002<\/p>\n

\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n

\u6709\u4e24\u4e2a\u5173\u952e\u6b65\u9aa4\u9700\u8981\u66f4\u6539\uff1a<\/p>\n

    \n
  1. \u521d\u59cb\u5316\u201cnum\u201d\u53d8\u91cf\uff1a<\/strong> \u5728\u521d\u59cb\u5316\u811a\u672c\u4e2d\uff0c\u5c06\u201cnum\u201d\u53d8\u91cf\u521d\u59cb\u5316\u4e3a 0\u3002<\/li>\n
  2. \u5728\u6309\u94ae\u4e2d\u66f4\u65b0\u65e5\u5386\uff1a<\/strong> \u5728\u6309\u94ae\u70b9\u51fb\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u4e2d\uff0c\u9664\u4e86\u589e\u52a0\u201cnum\u201d\u7684\u503c\u5916\uff0c\u8fd8\u9700\u8981\u6267\u884c\u62fc\u63a5\u65e5\u671f\u7684 JavaScript \u4ee3\u7801\uff0c\u4ee5\u66f4\u65b0\u65e5\u5386\u663e\u793a\u3002<\/li>\n<\/ol>\n

    \u4fee\u6539\u540e\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n

    var num = 0;  \/\/ \u5728\u521d\u59cb\u5316\u65f6\u8bbe\u7f6e num \u4e3a 0\n\n$('.add_cla').click(function () {\n    num++;  \/\/ \u5df2\u5c06 \"num\" \u52a0 1\n    \/\/ \u6267\u884c\u62fc\u63a5\u65e5\u671f\u7684 JavaScript \u4ee3\u7801\u4ee5\u66f4\u65b0\u65e5\u5386\n});<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u901a\u8fc7\u8fd9\u4e9b\u66f4\u6539\uff0c\u201cnum\u201d\u53d8\u91cf\u5c06\u88ab\u6b63\u786e\u521d\u59cb\u5316\u5e76\u5728\u6309\u94ae\u70b9\u51fb\u4e8b\u4ef6\u4e2d\u52a8\u6001\u66f4\u65b0\uff0c\u4ece\u800c\u5141\u8bb8\u60a8\u6309\u9884\u671f\u589e\u52a0\u65e5\u5386\u663e\u793a\u7684\u6708\u4efd\u3002<\/p>\n
    \u4ee5\u4e0a\u5c31\u662f\u4e3a\u4ec0\u4e48\u201cnum\u201d\u53d8\u91cf\u65e0\u6cd5\u52a8\u6001\u589e\u52a0\u65e5\u5386\u6708\u4efd\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u4e3a\u4ec0\u4e48\u4f7f\u7528\u201cnum\u201d\u53d8\u91cf\u4e0d\u6210\u529f\uff1f \u95ee\u9898\u63cf\u8ff0\uff1a \u60a8\u5e0c\u671b\u4f7f\u7528\u201cnum\u201d\u53d8\u91cf\u52a8\u6001\u589e\u52a0\u65e5\u5386\u663e\u793a\u7684\u6708\u4efd\uff0c\u4f46\u9047\u5230\u4e86\u95ee\u9898\uff0c\u5bfc\u81f4\u9875\u9762\u65e0\u6cd5\u6b63\u5e38\u663e\u793a\u65e5\u671f\u3002 \u539f\u56e0\uff1a \u521d\u59cb\u5316\u6267\u884c\u65f6\uff0c\u201cnum\u201d\u53d8\u91cf\u672a\u5b9a\u4e49\uff08undefined\uff09\uff0c\u4ece\u800c\u5bfc\u81f4\u201cmonth_now + 1 + num\u201d\u7684\u7ed3\u679c\u4e3a\u975e\u6570\u503c\uff08NaN\uff09\u3002 \u89e3\u51b3\u65b9\u6848\uff1a \u6709\u4e24\u4e2a\u5173\u952e\u6b65\u9aa4\u9700\u8981\u66f4\u6539\uff1a \u521d\u59cb\u5316\u201cnum\u201d\u53d8\u91cf\uff1a \u5728\u521d\u59cb\u5316\u811a\u672c\u4e2d\uff0c\u5c06\u201cnum\u201d\u53d8\u91cf\u521d\u59cb\u5316\u4e3a 0\u3002 \u5728\u6309\u94ae\u4e2d\u66f4\u65b0\u65e5\u5386\uff1a \u5728\u6309\u94ae\u70b9\u51fb\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u4e2d\uff0c\u9664\u4e86\u589e\u52a0\u201cnum\u201d\u7684\u503c\u5916\uff0c\u8fd8\u9700\u8981\u6267\u884c\u62fc\u63a5\u65e5\u671f\u7684 JavaScript \u4ee3\u7801\uff0c\u4ee5\u66f4\u65b0\u65e5\u5386\u663e\u793a\u3002 \u4fee\u6539\u540e\u7684\u4ee3\u7801\u793a\u4f8b\uff1a var num = 0; \/\/ \u5728\u521d\u59cb\u5316\u65f6\u8bbe\u7f6e num \u4e3a 0 $(‘.add_cla’).click(function () { num++; \/\/ \u5df2\u5c06 “num” \u52a0 1 \/\/ \u6267\u884c\u62fc\u63a5\u65e5\u671f\u7684 JavaScript \u4ee3\u7801\u4ee5\u66f4\u65b0\u65e5\u5386 }); \u767b\u5f55\u540e\u590d\u5236 \u901a\u8fc7\u8fd9\u4e9b\u66f4\u6539\uff0c\u201cnum\u201d\u53d8\u91cf\u5c06\u88ab\u6b63\u786e\u521d\u59cb\u5316\u5e76\u5728\u6309\u94ae\u70b9\u51fb\u4e8b\u4ef6\u4e2d\u52a8\u6001\u66f4\u65b0\uff0c\u4ece\u800c\u5141\u8bb8\u60a8\u6309\u9884\u671f\u589e\u52a0\u65e5\u5386\u663e\u793a\u7684\u6708\u4efd\u3002 \u4ee5\u4e0a\u5c31\u662f\u4e3a\u4ec0\u4e48\u201cnum\u201d\u53d8\u91cf\u65e0\u6cd5\u52a8\u6001\u589e\u52a0\u65e5\u5386\u6708\u4efd\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-25584","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/25584","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=25584"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/25584\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=25584"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=25584"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=25584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}