在项目目录下创建一个 TypeScript 文件,例如checkFile.ts,接着编写以下代码: AI检测代码解析 import*asfsfrom'fs';// 导入 fs 模块// 定义一个函数用来判断文件是否存在functioncheckFileExists(filePath:string):void{// 使用 fs.existsSync 方法判断文件是否存在constexists=fs.existsSync(filePath);if(exists){c...
Check if file existsFile foundFile not foundImport and use the fileShow error "File does not exist"ImportCheckFileFileExistsFileNotFoundUseFileError 在上面的流程图中,首先我们尝试导入一个模块,然后检查相关文件是否存在。根据文件的存在与否,程序会进行不同的处理。 小结与最佳实践 在TypeScript 中,导入模块...
if (this.config.enableMqtt) {this.connectMqtt(); } // 加载缓存数据到内存中 this.LoadStations(); // 定时站点是否在线 // this.CheckStationOnline(); // 定时存储站点数据缓存this.taskStoreStationData(); // 定时重载站点信息 this.timerLoadStationInfo(); // 初始化http请求 thisinitApp...
TypeScript will first check whetherpackage.jsoncontains a"tsconfig"field, and if it does, TypeScript will try to load a configuration file from that field. If neither exists, TypeScript will try to read from atsconfig.jsonat the root. This is similar to...
As developers, we often need to deal with values that aren’t fully known at runtime. In fact, we often don’t know if properties exist, whether we’re getting a response from a server or reading a configuration file. JavaScript’sinoperator can check whether a property exists on an obje...
DROP TABLE IF EXISTS `powercuthistory`; CREATE TABLE `powercuthistory` ( `SStation` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL, `DeviceId` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NULL DEFAULT NULL, ...
If a compiled JavaScript file with the same name as a TypeScript file already exists, the TypeScript file will be ignored. ts-node will import the pre-compiled JavaScript. To force ts-node to import the TypeScript source, not the precompiled JavaScript, use --preferTsExts. Scope by direct...
If the package you are adding typings for is not on npm, set "nonNpm": true in the package.json, and make sure the name you choose for it does not conflict with the name of a package on npm. (You can use npm info <my-package> to check for the existence of the <my-package> ...
if(curTick > START_TICK && curTick %20===0) {// no terracotta exists, and we're waiting to spawn a new one.if(spawnCountdown >0) { spawnCountdown--;if(spawnCountdown <=0) { spawnNewTerracotta(); } }else{ checkForTerracotta(); } } ...
noImplicitAny: Raise error on expressions and declarations with an impliedanytype. This will throw an error if an argument,const,let, orvardoesn’t have a type. This is more of a mental check on yourself to create custom data types for your code. ...