# Globals : Global variables

There are some global variables and global functions predefined for each task in JSRE.

# Global Functions

# require(modName)

• modName {String} Module name.

Import specified module.

# Example

var Tcp = require('tcp');

# unbreakable(arrowFunc)

• arrowFunc {Function} Callback.

Run the specified callback function without allowing any interrupt response.

The purpose of using the arrow function is to allow the use of the outer this object.

# Example

unbreakable(() => {
  console.log('aaa');
  console.log('bbb');
  console.log('ccc');
});

# synchronize(arrowFunc)

• arrowFunc {Function} Callback.

Run the specified callback function, during which the protection code does not accept multi-tasking preemption. Protected code also needs this method in other tasks, otherwise there is no protection effect.

The purpose of using the arrow function is to allow the use of the outer this object.

# Example

• main.js

synchronize(() => {
  console.log('111');
  console.log('222');
  console.log('333');
});

• task.js

synchronize(() => {
  console.log('aaa');
  console.log('bbb');
  console.log('ccc');
});

The main task is printing a gap of 111 222 333 will not be preempted by other tasks print aaa bbb ccc.

# setTimeout(callback, delay[, ...arg])

Please refer to the timer module.

# setInterval(callback, delay[, ...arg])

Please refer to the timer module.

# setImmediate(callback[, ...arg])

Please refer to the timer module.

# clearTimeout(timeout)

Please refer to the timer module.

# clearInterval(timeout)

Please refer to the timer module.

# clearImmediate(timeout)

Please refer to the timer module.

# Standard conversion

EdgerOS 1.5.0 and later versions support.

# atob(data)

• data {String} Base64 encoded string.
• Returns: {Buffer} The decoded buffer object.

# btoa(data)

• data {String | Buffer | ArrayBuffer | TypedArray | Array} Requires base64 encoded source data.
• Returns: {String} Base64 encoded string.

# Global Modules

Global preloading module, does not need require() import.

# console

Please refer to the console module.

# process

Please refer to the process module.

# INI

Please refer to the INI module.

# Buffer

Please refer to the Buffer module.

# Timer

Please refer to the timer module.

# Task

Please refer to the Task module.

# Global Variables

# ARGUMENT

• {String} | {Object}

Current task entry parameter.

# exports

• {Any}

Please refer to the module module.

# module

• {Object}

Please refer to the module module.