{"html":"<!DOCTYPE html>\r\n<html lang=\"en\">\r\n    <head>\r\n        <meta charset=\"UTF-8\">\r\n    </head>\r\n    <body>\r\n\r\n        <script>\r\n            const _searchStrIndexOf = (str, target) => {\r\n                // 补全代码\r\n                let count = 0\r\n                let flag = 0\r\n                while (true) {\r\n                    if(str.indexOf(target,flag) === -1) {\r\n                        break\r\n                    } else {\r\n                        flag = str.indexOf(target,flag) + target.length\r\n                        count++\r\n                    }\r\n                }\r\n                return count\r\n            }\r\n        </script>\r\n    </body>\r\n</html>","css":"/* html, body {\\n\\twidth: 100%;\\n\\theight: 100%;\\n\\tmargin: 0;\\n\\tpadding: 0;\\n} */","js":"// 请在这里输入代码"}

使用indexOf查找，利用第二个参数