{"id":258,"date":"2024-10-27T13:19:05","date_gmt":"2024-10-27T05:19:05","guid":{"rendered":"https:\/\/womeifei.cn\/?p=258"},"modified":"2024-10-27T13:19:05","modified_gmt":"2024-10-27T05:19:05","slug":"javascript%e5%85%a5%e9%97%a8day01","status":"publish","type":"post","link":"https:\/\/womeifei.cn\/index.php\/2024\/10\/27\/javascript%e5%85%a5%e9%97%a8day01\/","title":{"rendered":"JavaScript\u5165\u95e8Day01"},"content":{"rendered":"\n

\u91cd\u70b9\u5b66\u4e60\u4e86\u56db\u4e2a\u8bed\u53e5 <\/p>\n\n\n\n

1.document.write() \u5c06\u5185\u5bb9\u5199\u5165\u7f51\u9875\u9875\u9762\u4e2d<\/p>\n\n\n\n

2.console.log()\u5c06\u5185\u5bb9\u5199\u5728\u63a7\u5236\u53f0\u4e2d<\/p>\n\n\n\n

3.prompt()\u7528\u6237\u8f93\u5165\u5185\u5bb9<\/p>\n\n\n\n

4.alert()\u5f39\u51fa\u8b66\u544a<\/p>\n\n\n\n

\u7528let \u58f0\u660e\u53d8\u91cf<\/strong> JavaScript\u662f\u4e00\u4e2a\u5f31\u7c7b\u578b\u8bed\u8a00 \u548cpython\u76f8\u4f3c<\/p>\n\n\n\n

\u7528const\u58f0\u660e\u5e38\u91cf \u8fd9\u4e2a\u5e38\u91cf\u4e0d\u53ef\u4ee5\u6539\u53d8!!!<\/p>\n\n\n\n

NAN<\/strong>(not a number)\u662f\u4e00\u4e2a\u7279\u6b8a\u503c \u4e0d\u77e5\u9053\u662f\u4ec0\u4e48\u4e1c\u897f \u4efb\u4f55\u5bf9NAN\u7684\u64cd\u4f5c\u90fd\u4f1a\u8fd4\u56deNAN<\/p>\n\n\n\n

undefined\u672a\u5b9a\u4e49\u7c7b\u578b<\/strong> \u5982\u679c\u68c0\u6d4b\u53d8\u91cf\u662fundefined\u5c31\u8bf4\u660e\u6ca1\u6709\u503c\u4f20\u9012\u8fc7\u6765<\/p>\n\n\n\n

null\u8868\u793a\u8d4b\u503c\u4f46\u662f\u5185\u5bb9\u4e3a\u7a7a<\/strong> \u5982\u679c\u4e00\u4e2a\u53d8\u91cf\u91cc\u9762\u786e\u5b9a\u5b58\u653e\u7684\u662f\u5bf9\u8c61\uff0c\u5982\u679c\u8fd8\u6ca1\u51c6\u5907\u597d\u5bf9\u8c61\uff0c\u53ef\u4ee5\u653e\u4e2anull<\/p>\n\n\n\n

<\/p>\n\n\n\n

\u9690\u5f0f\u8f6c\u6362 \/ \u663e\u793a\u8f6c\u6362<\/strong><\/p>\n\n\n\n

\u57fa\u672c\u77e5\u8bc6\u70b9\u5728\u4e0b\u56fe \u5176\u4e2d\u7ea2\u6846\u5185\u4e3a\u91cd\u70b9 <\/p>\n\n\n\n

Number()\u5f3a\u5236\u8f6c\u6362 +\u4f5c\u4e3a\u6b63\u53f7\u89e3\u6790\u4e5f\u53ef\u5c06\u5b57\u7b26\u4e32\u5f3a\u5236\u8f6c\u5316\u4e3a\u6570\u5b57\u7c7b\u578b<\/strong><\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u91cd\u70b9:\u6a21\u7248\u5b57\u7b26\u4e32<\/p>\n\n\n\n

\u7c7b\u4f3c\u4e8ePython\u7684f”…..{age}….” \u5904\u7406\u5b57\u7b26\u4e32\u548c\u53d8\u91cf\u7684\u8fde\u63a5<\/p>\n\n\n\n

\u4e0d\u540c\u7684\u662fJavaScript\u4e2d\u4f7f\u7528\u53cd\u5f15\u53f7`+\u7f8e\u5143\u7b26\u53f7$<\/strong>\u8fdb\u884c\u64cd\u4f5c<\/p>\n\n\n\n

\u4f8b\u5982 \u6211\u4eca\u5e74 + age + \u5c81\u4e86 < — > `\u6211\u4eca\u5e74${age}\u5c81\u4e86`<\/strong><\/p>\n\n\n\n

\u4f7f\u7528\u6a21\u7248\u5b57\u7b26\u4e32\u53ef\u4ee5\u5b8c\u6210\u7528\u81ea\u5df1\u8f93\u5165\u7684\u53d8\u91cf\u5bf9\u9875\u9762\u8fdb\u884c\u6e32\u67d3 \u5982\u4e0b\u56fe<\/p>\n\n\n\n

\u8868\u683c\u91cc\u6846\u8d77\u6765\u7684\u56db\u4e2a\u6570\u636e\u90fd\u662f\u6211\u4eec\u540e\u671f\u6dfb\u52a0\u7684 \u8fd9\u5c31\u5b9e\u73b0\u4e86\u4ea4\u4e92<\/strong>\u7684\u6548\u679c<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n

\u73b0\u5728\u6b63\u5f0f\u8fdb\u5165\u4e86\u524d\u7aef\u5b66\u4e60\u7684\u7b2c\u4e8c\u9636\u6bb5\u4e86 \u5bf9\u4e4b\u524d\u7684CSS+HTML\u77e5\u8bc6\u8fd8\u8981\u590d\u4e60\u5de9\u56fa (\u8c01\u6562\u8bf4\u81ea\u5df1\u7cbe\u901aCSS?) \u575a\u6301! \u575a\u6301! \u575a\u6301!<\/p>\n\n\n\n

alert(“\u6211\u4f1a\u6210\u529f\u7684!!!”)<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

\u91cd\u70b9\u5b66\u4e60\u4e86\u56db\u4e2a\u8bed\u53e5 1.document.write() \u5c06\u5185\u5bb9\u5199\u5165\u7f51\u9875\u9875\u9762\u4e2d 2.console.log() […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,1],"tags":[],"class_list":["post-258","post","type-post","status-publish","format-standard","hentry","category-javascript","category-1"],"_links":{"self":[{"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/posts\/258","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/comments?post=258"}],"version-history":[{"count":1,"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/posts\/258\/revisions"}],"predecessor-version":[{"id":264,"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/posts\/258\/revisions\/264"}],"wp:attachment":[{"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/media?parent=258"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/categories?post=258"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/tags?post=258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}