\u7528js\u5199\u7684\uff0c\u8fd9\u91cc\u9762\u8981\u7528\u5230JS\u4e2d\u7684IndexOf\u51fd\u6570\uff0c\u6211\u4eec\u5148\u770b\u770bJS\u4e2dIndexOf\u7684\u7528\u6cd5\uff1a<\/p>\n
\u8fd4\u56de String \u5bf9\u8c61\u5185\u7b2c\u4e00\u6b21\u51fa\u73b0\u5b50\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u4f4d\u7f6e\u3002\u00a0 \u53c2\u6570 \u5fc5\u9009\u9879\u3002String \u5bf9\u8c61\u6216\u6587\u5b57\u3002<\/span><\/p>\n subString<\/span><\/p>\n \u5fc5\u9009\u9879\u3002\u8981\u5728 String \u5bf9\u8c61\u4e2d\u67e5\u627e\u7684\u5b50\u5b57\u7b26\u4e32\u3002<\/span><\/p>\n starIndex<\/span><\/p>\n \u53ef\u9009\u9879\u3002\u8be5\u6574\u6570\u503c\u6307\u51fa\u5728 String \u5bf9\u8c61\u5185\u5f00\u59cb\u67e5\u627e\u7684\u7d22\u5f15\u3002\u5982\u679c\u7701\u7565\uff0c\u5219\u4ece\u5b57\u7b26\u4e32\u7684\u5f00\u59cb\u5904\u67e5\u627e\u3002<\/span><\/p>\n \u8bf4\u660e \u5982\u679c startindex \u662f\u8d1f\u6570\uff0c\u5219 startindex \u88ab\u5f53\u4f5c\u96f6\u3002\u5982\u679c\u5b83\u6bd4\u6700\u5927\u7684\u5b57\u7b26\u4f4d\u7f6e\u7d22\u5f15\u8fd8\u5927\uff0c\u5219\u5b83\u88ab\u5f53\u4f5c\u6700\u5927\u7684\u53ef\u80fd\u7d22\u5f15\u3002<\/span><\/p>\n \u4ece\u5de6\u5411\u53f3\u6267\u884c\u67e5\u627e\u3002\u5426\u5219\uff0c\u8be5\u65b9\u6cd5\u4e0e lastIndexOf \u76f8\u540c\u3002<\/span><\/p>\n \u793a\u4f8b function IndexDemo(str2){ \u7528js\u5199\u7684\uff0c\u8fd9\u91cc\u9762\u8981\u7528\u5230JS\u4e2d\u7684IndexOf\u51fd\u6570\uff0c\u6211\u4eec\u5148\u770b\u770bJS\u4e2d...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,3],"tags":[],"class_list":["post-53","post","type-post","status-publish","format-standard","hentry","category-phpjsshell","category-3"],"_links":{"self":[{"href":"https:\/\/www.01xj.net\/index.php?rest_route=\/wp\/v2\/posts\/53","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.01xj.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.01xj.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.01xj.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.01xj.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=53"}],"version-history":[{"count":2,"href":"https:\/\/www.01xj.net\/index.php?rest_route=\/wp\/v2\/posts\/53\/revisions"}],"predecessor-version":[{"id":55,"href":"https:\/\/www.01xj.net\/index.php?rest_route=\/wp\/v2\/posts\/53\/revisions\/55"}],"wp:attachment":[{"href":"https:\/\/www.01xj.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=53"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.01xj.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=53"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.01xj.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=53"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n<\/span>strObj.indexOf(subString[, startIndex])<\/span><\/p>\n
\nstrObj<\/span><\/p>\n
\nindexOf \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u6574\u6570\u503c\uff0c\u6307\u51fa String \u5bf9\u8c61\u5185\u5b50\u5b57\u7b26\u4e32\u7684\u5f00\u59cb\u4f4d\u7f6e\u3002\u5982\u679c\u6ca1\u6709\u627e\u5230\u5b50\u5b57\u7b26\u4e32\uff0c\u5219\u8fd4\u56de -1\u3002<\/span><\/p>\n
\n\u4e0b\u9762\u7684\u793a\u4f8b\u8bf4\u660e\u4e86 indexOf \u65b9\u6cd5\u7684\u7528\u6cd5\u3002<\/span><\/p>\n
\nvar str1 = \u201cBABEBIBOBUBABEBIBOBU\u201d
\nvar s = str1.indexOf(str2);
\nreturn(s);
\n}<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"