An operation on a Deno.Kv that can be performedatomically. Atomic operations do not auto-commit, and must be committedexplicitly by calling the commit method.

The interface for handling a child process returned fromDeno.Command.spawn.

Create a child process.

The Deno abstraction for reading and writing files.

A custom HttpClient for use with fetch function. This isdesigned to allow custom certificates or proxies to be used with fetch().

A key-value database that can be used to store and retrieve data.

An iterator over a range of data entries in a Deno.Kv.

Wrapper type for 64-bit unsigned integers for use as values in aDeno.Kv.

Deno's permission management API.

An EventTarget returned from the Deno.permissionsAPI which can provide updates to any state changes of the permission.

An unsafe function pointer for passing JavaScript functions as C functionpointers to foreign function calls.

An unsafe pointer to a function, for calling functions that are not presentas symbols.

A collection of static functions for interacting with pointer objects.

An unsafe pointer view to a memory location as specified by the pointervalue. The UnsafePointerView API follows the standard built in interfaceDataView for accessing the underlying types at an memorylocation (numbers, strings and raw bytes).

Creates a presentable WebGPU surface from given window anddisplay handles.

A enum which defines the seek mode for IO related APIs that supportseeking.

Registers the given function as a listener of the given signal event.

Register a benchmark test which will be run when deno bench is used onthe command line and the containing module looks like a bench module.

Change the current working directory to the specified path.

Changes the permission of a specific file/directory of specified path.Ignores the process's umask.

Synchronously changes the permission of a specific file/directory ofspecified path. Ignores the process's umask.

Change owner of a regular file or directory.

Synchronously change owner of a regular file or directory.

Connects to the hostname (default is "127.0.0.1") and port on the namedtransport (default is "tcp"), and resolves to the connection (Conn).

Establishes a secure connection over TLS (transport layer security) usingan optional list of CA certs, hostname (default is "127.0.0.1") and port.

Gets the size of the console as columns/rows.

Copies the contents and permissions of one file to another specified path,by default creating a new file if needed, else overwriting. Fails if targetpath is a directory or is unwritable.

Synchronously copies the contents and permissions of one file to anotherspecified path, by default creating a new file if needed, else overwriting.Fails if target path is a directory or is unwritable.

Creates a file if none exists or truncates an existing file and resolves toan instance of Deno.FsFile.

Create a custom HttpClient to use with fetch. This is anextension of the web platform Fetch API which allows Deno to use customTLS CA certificates and connect via a proxy while using fetch().

Creates a file if none exists or truncates an existing file and returnsan instance of Deno.FsFile.

Create a cron job that will periodically execute the provided handlercallback based on the specified schedule.

Return a string representing the current working directory.

Opens an external dynamic library and registers symbols, making foreignfunctions available to be called.

Returns the path to the current deno executable.

Exit the Deno process with optional exit code.

Returns the group id of the process on POSIX platforms. Returns null on windows.

Get the hostname of the machine the Deno process is running on.

Converts the input into a string that has the same format as printed byconsole.log().

Send a signal to process under given pid. The value and meaning of thesignal to the process is operating system and process dependant.Signal provides the most common signals. Default signalis "SIGTERM".

Creates newpath as a hard link to oldpath.

Synchronously creates newpath as a hard link to oldpath.

Listen announces on the local transport address.

Listen announces on the local transport address.

Listen announces on the local transport address over TLS (transport layersecurity).

Returns an array containing the 1, 5, and 15 minute load averages. Theload average is a measure of CPU and IO utilization of the last one, five,and 15 minute periods expressed as a fractional number. Zero means thereis no load. On Windows, the three values are always the same and representthe current load, not the 1, 5 and 15 minute load averages.

Resolves to a Deno.FileInfo for the specified path. Ifpath is a symlink, information for the symlink will be returned insteadof what it points to.

Synchronously returns a Deno.FileInfo for the specifiedpath. If path is a symlink, information for the symlink will bereturned instead of what it points to.

Creates a new temporary directory in the default directory for temporaryfiles, unless dir is specified. Other optional options includeprefixing and suffixing the directory name with prefix and suffixrespectively.

Synchronously creates a new temporary directory in the default directoryfor temporary files, unless dir is specified. Other optional optionsinclude prefixing and suffixing the directory name with prefix andsuffix respectively.

Creates a new temporary file in the default directory for temporaryfiles, unless dir is specified.

Synchronously creates a new temporary file in the default directory fortemporary files, unless dir is specified.

Returns an object describing the memory usage of the Deno process and theV8 subsystem measured in bytes.

Creates a new directory with the specified path.

Synchronously creates a new directory with the specified path.

Returns an array of the network interface information.

Open a file and resolve to an instance of Deno.FsFile. Thefile does not need to previously exist if using the create or createNewopen options. The caller may have the resulting file automatically closedby the runtime once it's out of scope by declaring the file variable withthe using keyword.

Open a new Deno.Kv connection to persist data.

Synchronously open a file and return an instance ofDeno.FsFile. The file does not need to previously exist ifusing the create or createNew open options. The caller may have theresulting file automatically closed by the runtime once it's out of scopeby declaring the file variable with the using keyword.

Returns the release version of the Operating System.

Returns the Operating System uptime in number of seconds.

Reads the directory given by path and returns an async iterable ofDeno.DirEntry. The order of entries is not guaranteed.

Synchronously reads the directory given by path and returns an iterableof Deno.DirEntry. The order of entries is not guaranteed.

Reads and resolves to the entire contents of a file as an array of bytes.TextDecoder can be used to transform the bytes to string if required.Reading a directory returns an empty data array.

Synchronously reads and returns the entire contents of a file as an arrayof bytes. TextDecoder can be used to transform the bytes to string ifrequired. Reading a directory returns an empty data array.

Resolves to the full path destination of the named symbolic link.

Synchronously returns the full path destination of the named symboliclink.

Asynchronously reads and returns the entire contents of a file as an UTF-8decoded string. Reading a directory throws an error.

Synchronously reads and returns the entire contents of a file as an UTF-8decoded string. Reading a directory throws an error.

Resolves to the absolute normalized path, with symbolic links resolved.

Synchronously returns absolute normalized path, with symbolic linksresolved.

Make the timer of the given id block the event loop from finishing.

Removes the named file or directory.

Removes the given signal listener that has been registered withDeno.addSignalListener.

Synchronously removes the named file or directory.

Renames (moves) oldpath to newpath. Paths may be files or directories.If newpath already exists and is not a directory, rename() replaces it.OS-specific restrictions may apply when oldpath and newpath are indifferent directories.

Synchronously renames (moves) oldpath to newpath. Paths may be files ordirectories. If newpath already exists and is not a directory,renameSync() replaces it. OS-specific restrictions may apply whenoldpath and newpath are in different directories.

Performs DNS resolution against the given query, returning resolvedrecords.

Serves HTTP requests with the given handler.

Start TLS handshake from an existing connection using an optional list ofCA certificates, and hostname (default is "127.0.0.1"). Specifying CA certsis optional. By default the configured root certificates are used. Usingthis function requires that the other end of the connection is prepared fora TLS handshake.

Resolves to a Deno.FileInfo for the specified path. Willalways follow symlinks.

Synchronously returns a Deno.FileInfo for the specifiedpath. Will always follow symlinks.

Creates newpath as a symbolic link to oldpath.

Creates newpath as a symbolic link to oldpath.

Displays the total amount of free and used physical and swap memory in thesystem, as well as the buffers and caches used by the kernel.

Truncates (or extends) the specified file, to reach the specified len.If len is not specified then the entire file contents are truncated.

Synchronously truncates (or extends) the specified file, to reach thespecified len. If len is not specified then the entire file contentsare truncated.

Returns the user id of the process on POSIX platforms. Returns null on Windows.

Retrieve the process umask. If mask is provided, sets the process umask.This call always returns what the umask was before the call.

Make the timer of the given id not block the event loop from finishing.

Upgrade an incoming HTTP request to a WebSocket.

Changes the access (atime) and modification (mtime) times of a filesystem object referenced by path. Given times are either in seconds(UNIX epoch time) or as Date objects.

Synchronously changes the access (atime) and modification (mtime) timesof a file system object referenced by path. Given times are either inseconds (UNIX epoch time) or as Date objects.

Watch for file system events against one or more paths, which can befiles or directories. These paths must exist already. One user action (e.g.touch test.file) can generate multiple file system events. Likewise,one user action can result in multiple file paths in one event (e.g. mv old_name.txt new_name.txt).

Write data to the given path, by default creating a new file ifneeded, else overwriting.

Synchronously write data to the given path, by default creating a newfile if needed, else overwriting.

Write string data to the given path, by default creating a new file ifneeded, else overwriting.

Synchronously write string data to the given path, by default creatinga new file if needed, else overwriting.

A check to perform as part of a Deno.AtomicOperation. The checkwill fail if the versionstamp for the key-value pair in the KV store doesnot match the given versionstamp. A check with a null versionstamp checksthat the key-value pair does not currently exist in the KV store.

Basic authentication credentials to be used with a Deno.Proxyserver when specifying Deno.CreateHttpClientOptions.

Context that is passed to a benchmarked function. The instance is sharedbetween iterations of the benchmark. Its methods can be used for exampleto override of the measured portion of the function.

The interface for defining a benchmark test using Deno.bench.

If Deno.resolveDns is called with "CAA" record typespecified, it will resolve with an array of objects with this interface.

Options which can be set when calling Deno.Command.

The interface returned from calling Deno.Command.output orDeno.Command.outputSync which represents the result of spawning thechild process.

The options used when creating a Deno.HttpClient.

CronSchedule is the interface used for JSON formatcron schedule.

A generic transport listener for message-oriented protocols.

Information about a directory entry returned from Deno.readDirand Deno.readDirSync.

A dynamic library resource. Use Deno.dlopen to load a dynamiclibrary and return this interface.

An interface containing methods to interact with the process environmentvariables.

The permission descriptor for the allow-env and deny-env permissions, which controlsaccess to being able to read and write to the process environment variablesas well as access other information about the environment. The optionvariable allows scoping the permission to a specific environmentvariable.

The permission descriptor for the allow-ffi and deny-ffi permissions, which controlsaccess to loading foreign code and interfacing with it via theForeign Function Interface APIavailable in Deno. The option path allows scoping the permission to aspecific path on the host.

Provides information about a file and is returned byDeno.stat, Deno.lstat, Deno.statSync,and Deno.lstatSync or from calling stat() and statSync()on an Deno.FsFile instance.

The interface for a foreign function as defined by its parameter and resulttypes.

A foreign library interface descriptor.

Represents a unique file system event yielded by aDeno.FsWatcher.

Returned by Deno.watchFs. It is an async iterator yielding upsystem events. To stop watching the file system by calling .close()method.

An instance of the server created using Deno.serve() API.

Option which can be specified when performing Deno.inspect.

A versioned pair of key and value in a Deno.Kv.

Options for listing key-value pairs in a Deno.Kv.

A generic network listener for stream-oriented protocols.

Options which can be set when using Deno.makeTempDir,Deno.makeTempDirSync, Deno.makeTempFile, andDeno.makeTempFileSync.

Options which can be set when using Deno.mkdir andDeno.mkdirSync.

Represents membership of a IPv4 multicast group.

Represents membership of a IPv6 multicast group.

If Deno.resolveDns is called with "MX" record typespecified, it will return an array of objects with this interface.

If Deno.resolveDns is called with "NAPTR" record typespecified, it will return an array of objects with this interface.

The native struct type for interfacing with foreign functions.

The permission descriptor for the allow-net and deny-net permissions, which controlsaccess to opening network ports and connecting to remote hosts via thenetwork. The option host allows scoping the permission for outboundconnection to a specific host and port.

The information for a network interface returned from a call toDeno.networkInterfaces.

Options which can be set when doing Deno.open andDeno.openSync.

A set of options which can define the permissions within a test or workercontext at a highly specific level.

The interface which defines what event types are supported byPermissionStatus instances.

A non-null pointer, represented as an objectat runtime. The object's prototype is nulland cannot be changed. The object cannot beassigned to either and is thus entirely read-only.

The definition of a proxy when specifyingDeno.CreateHttpClientOptions.

Options which can be set when using Deno.readFile orDeno.readFileSync.

The permission descriptor for the allow-read and deny-read permissions, which controlsaccess to reading resources from the local host. The option path allowsscoping the permission to a specific path (and if the path is a directoryany sub paths).

Options which can be set when using Deno.remove andDeno.removeSync.

Options which can be set when using Deno.resolveDns.

The permission descriptor for the allow-run and deny-run permissions, which controlsaccess to what sub-processes can be executed by Deno. The option commandallows scoping the permission to a specific executable.

Interface that module run with deno serve subcommand must conform to.

Additional information for an HTTP request and its connection.

Options which can be set when calling Deno.serve.

Options that can be passed to Deno.serve to create a server listening ona TCP port.

Options that can be passed to Deno.serve to create a server listening ona Unix domain socket.

If Deno.resolveDns is called with "SOA" record typespecified, it will return an array of objects with this interface.

If Deno.resolveDns is called with "SRV" record typespecified, it will return an array of objects with this interface.

Options that can be used with symlink andsymlinkSync.

The permission descriptor for the allow-sys and deny-sys permissions, which controlsaccess to sensitive host system information, which malicious code mightattempt to exploit. The option kind allows scoping the permission to aspecific piece of information.

Information returned from a call to Deno.systemMemoryInfo.

Context that is passed to a testing function, which can be used to eithergain information about the current test, or register additional teststeps within the current test.

Provides certified key material from strings. The key material is provided inPEM-format (Privacy Enhanced Mail, https://www.rfc-editor.org/rfc/rfc1422) which can be identified by having-----BEGIN----- and -----END----- markers at the beginning and end of the strings. This type of key is not compatiblewith DER-format keys which are binary.

Unstable options which can be set when opening a datagram listener viaDeno.listenDatagram.

Options which can be set when opening a Unix listener viaDeno.listen or Deno.listenDatagram.

Definition of a unsafe callback function.

Options which can be set when performing aDeno.upgradeWebSocket upgrade of a Request

The object that is returned from a Deno.upgradeWebSocketrequest.

Options for writing to a file.

The permission descriptor for the allow-write and deny-write permissions, whichcontrols access to writing to resources from the local host. The optionpath allow scoping the permission to a specific path (and if the path isa directory any sub paths).

A set of error constructors that are raised by Deno APIs.

A namespace containing runtime APIs available in Jupyter notebooks.

APIs for working with the OpenTelemetry observability framework. Deno canexport traces, metrics, and logs to OpenTelemetry compatible backends viathe OTLP protocol.

CronScheduleExpression is used as the type of minute, hour,dayOfMonth, month, and dayOfWeek in CronSchedule.

Type conversion for foreign symbol return types.

Type conversion for foreign symbol return types and unsafe callbackparameters.

Additional information for FsEvent objects with the "other" kind.

Consistency level of a KV operation.

An optional versioned pair of key and value in a Deno.Kv.

A key to be persisted in a Deno.Kv. A key is a sequenceof Deno.KvKeyParts.

A single part of a Deno.KvKey. Parts are orderedlexicographically, first by their type, and within a given type by theirvalue.

A selector that selects the range of data returned by a list operation on aDeno.Kv.

A mutation to a key in a Deno.Kv. A mutation is acombination of a key, a value, and a type. The type determines how themutation is applied to the key.

All BigInt number types for interfacing with foreign functions.

The native boolean type for interfacing to foreign functions.

The native buffer type for interfacing to foreign functions.

The native function type for interfacing with foreign functions.

All plain number types for interfacing with foreign functions.

The native pointer type for interfacing to foreign functions.

All supported types for interfacing with foreign functions.

The native void type for interfacing with foreign functions.

Permission descriptors which define a permission and can be queried,requested, or revoked.

The name of a privileged feature which needs permission.

Options which define the permissions within a test or worker context.

The current status of the permission:

Pointers are represented either with a PointerObjectobject or a null if the pointer is null.

The type of the resource record to resolve via DNS usingDeno.resolveDns.

A handler for HTTP requests. Consumes a request and returns a response.

Operating signals which can be listened for or sent to sub-processes. Whatsignals and what their standard behaviors are OS dependent.

A utility type that infers a foreign library interface.

A utility type that infers a foreign symbol.

Specialized listener that accepts TCP connections.

Specialized listener that accepts TLS connections.

A utility type for conversion of parameter types of foreign functions.

Type conversion for unsafe callback return types.

Type conversion for foreign symbol parameters and unsafe callback returntypes.

Specialized listener that accepts Unix connections.

An unsafe callback function.

Returns the script arguments to the program.

Information related to the build of the current Deno runtime.

An interface containing methods to interact with the process environmentvariables.

The exit code for the Deno process.

The URL of the entrypoint module entered from the command-line. Itrequires read permission to the CWD.

Reflects the NO_COLOR environment variable at program start.

Deno's permission management API.

The current process ID of this instance of the Deno CLI.

The process ID of parent process of this instance of the Deno CLI.

A reference to stderr which can be used to write directly to stderr.It implements the Deno specificWriter,WriterSync,and Closer interfaces as well as provides aWritableStream interface.

A reference to stdin which can be used to read directly from stdin.

A reference to stdout which can be used to write directly to stdout.It implements the Deno specificWriter,WriterSync,and Closer interfaces as well as provides aWritableStream interface.

Register a test which will be run when deno test is used on the commandline and the containing module looks like a test module.

Version information related to the current Deno CLI runtime environment.