Javascript常用语法

Posted 2020-10-13 人最大的荣耀不在于从未失败，而在于每次失败以后都能东山再起

1. 判断成员是否是一个函数：

if (typeof options.sourceMapName === ‘function‘) { mapNameGenerator = options.sourceMapName; }

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1. Try/Catch

var result; try { result = uglify.minify(availableFiles, f.dest, options); } catch (e) { console.log(e); err = new Error(‘Uglification failed.‘); if (e.message) { err.message += ‘\n‘ + e.message + ‘. \n‘; if (e.line) { err.message += ‘Line ‘ + e.line + ‘ in ‘ + availableFiles + ‘\n‘; } } err.origError = e; grunt.log.warn(‘Uglifying source ‘ + chalk.cyan(availableFiles) + ‘ failed.‘); grunt.fail.warn(err); }

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1. 将一个数组里面的值用某个符号拼接起来。

var unCompiledJSString = availableFiles.map(function (file) { return grunt.file.read(file); }).join(‘‘);

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