JavaScript\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\u6765\u6839\u636e\u4e0d\u540c\u7684\u6761\u4ef6\u6267\u884c\u4e0d\u540c\u52a8\u4f5c\u3002<\/p>\n
—————————————————————————- \u5728\u5199\u4ee3\u7801\u65f6\u6211\u4eec\u65f6\u5e38\u78b0\u5230\u60f3\u8981\u6839\u636e\u4e0d\u540c\u6761\u4ef6\u6267\u884c\u4e0d\u540c\u7684\u52a8\u4f5c\u7684\u60c5\u51b5\uff0c\u8fd9\u65f6\u5c31\u53ef\u4ee5\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\u6765\u5b8c\u6210\u3002<\/p>\n \u5728JavaScript\u4e2d\u6211\u4eec\u6709\u4ee5\u4e0b\u6761\u4ef6\u8bed\u53e5\uff1a<\/p>\n ——————————————————————————- \u8bed\u6cd5\uff1a<\/p>\n \u6ce8\u610f if<\/strong> \u7528\u5c0f\u5199\u5b57\u6bcd\uff0c\u5982\u679c\u4f60\u662f\u7528\u4e86\u5927\u5199\u5b57\u6bcd(IF)\uff0cJavaScript \u5c06\u4f1a\u51fa\u9519\uff01<\/p>\n \u4f8b1<\/strong><\/p>\n var d=new Date() \u4f8b2<\/strong><\/p>\n var d=new Date() \u6ce8\u610f:<\/strong> \u5f53\u6bd4\u8f83<\/strong>\u4e24\u4e2a\u53d8\u91cf\u662f\u5426\u76f8\u7b49\u65f6\uff0c\u5fc5\u987b\u4f7f\u7528\u53cc\u7b49\u53f7(==)!<\/p>\n \u8bf7\u6ce8\u610f\u8fd9\u4e2a\u8bed\u6cd5\u4e2d\u6ca1\u6709 ..else.. \uff0c\u7a0b\u5e8f\u53ea\u6709\u5728\u7279\u5b9a\u6761\u4ef6\u4e3a\u771f\u65f6<\/strong>\u624d\u6267\u884c\u67d0\u4e9b\u4ee3\u7801\uff0c\u5426\u5219\u4e0d\u6267\u884c\u8fd9\u4e9b\u4ee3\u7801\uff0c\u5bf9\u5176\u4ed6\u4ee3\u7801\u7684\u6267\u884c\u6ca1\u6709\u5f71\u54cd\u3002<\/p>\n ——————————————————————————- \u8bed\u6cd5\uff1a<\/p>\n \u4f8b\u5b50<\/strong><\/p>\n var d = new Date() ———————————————————————————- \u8bed\u6cd5\uff1a<\/p>\n \u4f8b\u5b50<\/strong><\/p>\n var d = new Date() JavaScript\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\u6765\u6839\u636e\u4e0d\u540c\u7684\u6761\u4ef6\u6267\u884c\u4e0d\u540c\u52a8\u4f5c\u3002 —————————————————————————- \u6761\u4ef6\u8bed\u53e5 \u5728\u5199\u4ee3\u7801\u65f6\u6211\u4eec\u65f6\u5e38\u78b0\u5230\u60f3\u8981\u6839\u636e\u4e0d\u540c\u6761\u4ef6\u6267\u884c\u4e0d\u540c\u7684\u52a8\u4f5c\u7684\u60c5\u51b5\uff0c\u8fd9\u65f6\u5c31\u53ef\u4ee5\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\u6765\u5b8c\u6210\u3002 \u5728JavaScript\u4e2d\u6211\u4eec\u6709\u4ee5\u4e0b\u6761\u4ef6\u8bed\u53e5\uff1a if \u8bed\u53e5 – \u53ea\u6709\u67d0\u6761\u4ef6\u6210\u7acb\u624d\u6267\u884c\u67d0\u4e9b\u4ee3\u7801\u7684\u65f6\u5019\u4f7f\u7528\u6b64\u8bed\u53e5 if…else \u8bed\u53e5 – \u8981\u5728\u6761\u4ef6\u6210\u7acb\u65f6\u6267\u884c\u4e00\u4e9b\u4ee3\u7801\uff0c\u4e0d\u6210\u7acb\u65f6\u6267\u884c\u53e6\u5916\u4e00\u4e9b\u7684\u4ee3\u7801\uff0c\u4f7f\u7528\u6b64\u8bed\u53e5 if…else if….else \u8bed\u53e5 – \u5982\u679c\u4f60\u60f3\u5728\u591a\u4e2a\u8bed\u53e5\u7ec4\u4e2d\u9009\u4e00\u7ec4\u6765\u6267\u884c\uff0c\u4f7f\u7528\u6b64\u8bed\u53e5 switch statement – \u5982\u679c\u4f60\u60f3\u5728\u4f17\u591a\u8bed\u53e5\u7ec4\u4e2d\u9009\u4e00\u7ec4\u6765\u6267\u884c\uff0c\u4f7f\u7528\u6b64\u8bed\u53e5\uff08\u4e0b\u4e00\u5c0f\u8282\u4ecb\u7ecd) ——————————————————————————- If \u8bed\u53e5\u53ea\u6709\u67d0\u6761\u4ef6\u6210\u7acb\u624d\u6267\u884c\u67d0\u4e9b\u4ee3\u7801\u7684\u65f6\u5019\u4f7f\u7528\u6b64\u8bed\u53e5 \u8bed\u6cd5\uff1a if (\u6761\u4ef6) { \u6761\u4ef6\u6210\u7acb\u65f6\u8981\u6267\u884c\u7684\u4ee3\u7801 } \u6ce8\u610f if \u7528\u5c0f\u5199\u5b57\u6bcd\uff0c\u5982\u679c\u4f60\u662f\u7528\u4e86\u5927\u5199\u5b57\u6bcd(IF)\uff0cJavaScript \u5c06\u4f1a\u51fa\u9519\uff01 \u4f8b1 <script type=”text\/javascript”> \/\/\u5982\u679c\u65f6\u95f4\u572810\u70b9\u4e4b\u524d\uff0c\u5199\u51fa\u95ee\u5019\u8bed”\u65e9\u4e0a\u597d” var d=new Date() var time=d.getHours()if (time<10) { document.write(“<b>\u65e9\u4e0a\u597d<\/b>”) } <\/script> \u4f8b2 <script type=”text\/javascript”> \/\/\u5982\u679c\u65f6\u95f4\u662f11\u70b9\uff0c\u5199\u51fa”\u5348\u996d\u65f6\u95f4!” var d=new […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3,"menu_order":4,"comment_status":"open","ping_status":"open","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/pages\/11"}],"collection":[{"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/comments?post=11"}],"version-history":[{"count":0,"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/pages\/11\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/pages\/3"}],"wp:attachment":[{"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/media?parent=11"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\u6761\u4ef6\u8bed\u53e5<\/strong><\/p>\n\n
\nIf \u8bed\u53e5<\/strong>\u53ea\u6709\u67d0\u6761\u4ef6\u6210\u7acb\u624d\u6267\u884c\u67d0\u4e9b\u4ee3\u7801\u7684\u65f6\u5019\u4f7f\u7528\u6b64\u8bed\u53e5<\/p>\n\n
\n if (\u6761\u4ef6)
\n{
\n\u6761\u4ef6\u6210\u7acb\u65f6\u8981\u6267\u884c\u7684\u4ee3\u7801
\n}<\/td>\n<\/tr>\n<\/table>\n\n
\n <script type=”text\/javascript”>
\n\/\/\u5982\u679c\u65f6\u95f4\u572810\u70b9\u4e4b\u524d\uff0c\u5199\u51fa\u95ee\u5019\u8bed”\u65e9\u4e0a\u597d”<\/p>\n
\nvar time=d.getHours()if (time<10)
\n{
\ndocument.write(“<b>\u65e9\u4e0a\u597d<\/b>”)
\n}
\n<\/script><\/td>\n<\/tr>\n<\/table>\n\n
\n <script type=”text\/javascript”>
\n\/\/\u5982\u679c\u65f6\u95f4\u662f11\u70b9\uff0c\u5199\u51fa”\u5348\u996d\u65f6\u95f4!”<\/p>\n
\nvar time=d.getHours()if (time==11)
\n{
\ndocument.write(“<b>\u5348\u996d\u65f6\u95f4!<\/b>”)
\n}
\n<\/script><\/td>\n<\/tr>\n<\/table>\n
\nIf…else <\/strong>\u8bed\u53e5
\n\u8981\u5728\u6761\u4ef6\u6210\u7acb\u65f6\u6267\u884c\u4e00\u4e9b\u4ee3\u7801\uff0c\u4e0d\u6210\u7acb\u65f6\u6267\u884c\u53e6\u5916\u4e00\u4e9b\u7684\u4ee3\u7801\uff0c\u4f7f\u7528\u6b64\u8bed\u53e5<\/p>\n\n
\n if (\u6761\u4ef6)
\n{
\n\u6761\u4ef6\u6210\u7acb\u65f6\u8981\u6267\u884c\u7684\u4ee3\u7801
\n}
\nelse
\n{
\n\u6761\u4ef6\u4e0d\u6210\u7acb\u65f6\u8981\u6267\u884c\u7684\u4ee3\u7801
\n}<\/td>\n<\/tr>\n<\/table>\n\n
\n <script type=”text\/javascript”>
\n\/\/\u5982\u679c\u65f6\u95f4\u572810\u70b9\u4ee5\u524d\uff0c\u6253\u51fa\u95ee\u5019\u8bed”\u65e9\u4e0a\u597d”
\n\/\/\u5426\u5219\u6253\u51fa\u95ee\u5019\u8bed”\u4f60\u597d”<\/p>\n
\nvar time = d.getHours()if (time < 10)
\n{
\ndocument.write(“\u65e9\u4e0a\u597d!”)
\n}
\nelse
\n{
\ndocument.write(“\u4f60\u597d!”)
\n}
\n<\/script><\/td>\n<\/tr>\n<\/table>\n
\nIf…else if…else \u8bed\u53e5<\/strong>
\n\u5982\u679c\u4f60\u60f3\u5728\u591a\u7ec4\u8bed\u53e5\u4e2d\u9009\u62e9\u4e00\u7ec4\u6765\u6267\u884c\uff0c\u4f7f\u7528\u6b64\u8bed\u53e5<\/p>\n\n
\n if (\u6761\u4ef61)
\n{
\n\u6761\u4ef61\u6210\u7acb\u65f6\u8981\u6267\u884c\u7684\u4ee3\u7801
\n}
\nelse if (\u6761\u4ef62)
\n{
\n\u6761\u4ef62\u6210\u7acb\u65f6\u8981\u6267\u884c\u7684\u4ee3\u7801
\n}
\nelse
\n{
\n\u5982\u679c\u6761\u4ef61\u548c\u6761\u4ef62\u90fd\u4e0d\u6210\u7acb\u65f6\u8981\u6267\u884c\u7684\u4ee3\u7801
\n}<\/td>\n<\/tr>\n<\/table>\n\n
\n <script type=”text\/javascript”>
\n\/\/\u5982\u679c\u65f6\u95f4\u572810\u70b9\u4ee5\u524d\uff0c\u6253\u51fa\u95ee\u5019\u8bed”\u65e9\u4e0a\u597d”
\n\/\/10\u70b9\u523016\u70b9\u4e4b\u95f4\u6253\u51fa\u95ee\u5019\u8bed”\u4f60\u597d”
\n\/\/\u5176\u4ed6\u65f6\u5019\u6253\u51fa\u95ee\u5019\u8bed”\u5927\u5bb6\u597d!”<\/p>\n
\nvar time = d.getHours()
\nif (time<10)
\n{
\ndocument.write(“<b>\u65e9\u4e0a\u597d<\/b>”)
\n}
\nelse if (time>10 && time<16)
\n{
\ndocument.write(“<b>\u4f60\u597d<\/b>”)
\n}
\nelse
\n{
\ndocument.write(“<b>\u5927\u5bb6\u597d!<\/b>”)
\n}
\n<\/script><\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"