moduleglobal

Global object, the base object accessible to all scripts

object

Buffer

Binary data cache object forioData processing for reading and writing, seeBufferobject.

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Buffer global.Buffer;

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TextDecoder

TextDecoderdecode object, seeTextDecoderobject.

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TextDecoder global.TextDecoder;

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TextEncoder

TextEncoderencoding object, seeTextEncoderobject.

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TextEncoder global.TextEncoder;

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console

console access object

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console global.console;

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process

process object

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process global.process;

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performance

Basic performance monitoring module

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performance global.performance;

static function

run

run a script

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static global.run(String fname,
    Array argv = []);

Call parameters:

• fname: String, specifies the script path to run
• argv: Array, specifies the parameters to run, this parameter can be obtained using argv in the script

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require

Load a module and return the module object, see @ref module for more information

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static Value global.require(String id);

Call parameters:

• id: String, specifies the name of the module to load

return result:

• Value, returns the exported object of the loaded module

require can be used to load base modules, file modules.

The basic module is the module initialized when the sandbox is created, and you only need to pass the corresponding id when referencing, such as require("net").

The file module is a user-defined module, and the relative path starting with ./ or ../ needs to be passed when referencing. The file module supports .js, .jsc and .jsondocument.

The file module also supports the package.json format. When the module is in a directory structure, require will first query the main in package.json, and if it is not found, it will try to load index.js, index.jsc or index.json in the path.

If the reference path does not start with ./ or ../, and it is not a basic module, require searches from node_modules under the path where the current module is located, and recurses from the parent directory.

The basic process is as follows:

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setTimeout

Call a function after a specified time

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static Timer global.setTimeout(Function callback,
    Number timeout = 1,
    ...args);

Call parameters:

• callback: Function, specify the callback function
• timeout: Number, specifies the delay time in milliseconds. If it exceeds 2^31, execute it immediately.
• args: ..., additional parameters, passed to the specified callback, optional.

return result:

• Timer, returns the timer object

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clearTimeout

Clear the specified timer

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static global.clearTimeout(Value t);

Call parameters:

• t: Value, specifies the timer to be cleared

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setInterval

Call a function after every specified interval

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static Timer global.setInterval(Function callback,
    Number timeout,
    ...args);

Call parameters:

• callback: Function, specify the callback function
• timeout: Number, specifies the interval time in milliseconds. If it exceeds 2^31, execute it immediately.
• args: ..., additional parameters, passed to the specified callback, optional.

return result:

• Timer, returns the timer object

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clearInterval

Clear the specified timer

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static global.clearInterval(Value t);

Call parameters:

• t: Value, specifies the timer to be cleared

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setHrInterval

Call the function after a specified interval. This is a high-precision timer that will actively interrupt the running JavaScript script execution timer

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static Timer global.setHrInterval(Function callback,
    Number timeout,
    ...args);

Call parameters:

• callback: Function, specify the callback function
• timeout: Number, specifies the interval time in milliseconds. If it exceeds 2^31, execute it immediately.
• args: ..., additional parameters, passed to the specified callback, optional.

return result:

• Timer, returns the timer object

Because the timer of setHrInterval will interrupt the running code to execute the callback, so do not modify the data that may affect other modules in the callback function, or call any API function marked as async in the callback, otherwise unpredictable results will be produced. For example:

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var timers = require('timers');

var cnt = 0;
timers.setHrInterval(() => {
    cnt++;
}, 100);

while (cnt < 10);

console.error("===============================> done");

In this code, the loop at line 8 will not end because of the change of cnt, because JavaScript will determine that cnt will not be changed during this loop when optimizing the code.

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clearHrInterval

Clear the specified timer

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static global.clearHrInterval(Value t);

Call parameters:

• t: Value, specifies the timer to be cleared

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setImmediate

Execute the callback function immediately at the next free time

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static Timer global.setImmediate(Function callback,
    ...args);

Call parameters:

• callback: Function, specify the callback function
• args: ..., additional parameters, passed to the specified callback, optional.

return result:

• Timer, returns the timer object

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clearImmediate

Clear the specified timer

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static global.clearImmediate(Value t);

Call parameters:

• t: Value, specifies the timer to be cleared

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btoa

bybase64way to encode data

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static String global.btoa(Buffer data,
    Boolean url = false);

Call parameters:

• data:Buffer, the data to encode
• url: Boolean, specifies whether to useurlsafe character encoding

return result:

• String, returns the encoded string

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atob

bybase64way to decode a string into binary data

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static Buffer global.atob(String data);

Call parameters:

• data: String, the string to decode

return result:

• Buffer, returns the decoded binary data

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GC

Mandatory Garbage Collection

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static global.GC();

static property

Master

Worker,Workerhost object, only inWorkerThe entry script works

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static readonly Worker global.Master;

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global

Object, global object

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static readonly Object new global;

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argv

Array, get the running parameters of the current script, start js to get the process startup parameters, run the executed script to get the passed parameters

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static readonly Array global.argv;

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__filename

String, current script file name

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static readonly String global.__filename;

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__dirname

String, the directory where the current script is located

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static readonly String global.__dirname;