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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                ## 回調地獄 嵌套層次太多. ``` const fs = require('fs'); const path = require('path'); function getFileByPath(fpath, success, error) { fs.readFile(fpath, 'utf-8', function (err, data) { if (err) { return error(err); } return success(data); }); } // getFileByPath(path.join(__dirname, './1.txt'),function(data){ // console.log(data); // },function(error){ // console.log(error); // }); getFileByPath(path.join(__dirname, './1.txt'), function (data) { console.log(data); getFileByPath('./2.txt', function (data) { console.log(data); getFileByPath('./3.txt', function (data) { console.log(data); }); }); }); ```
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