$config->js() method

Set or retrieve a config value to be shared with javascript

Values are set to the Javascript variable ProcessWire.config[key].

  1. Specify a $key and $value to set a JS config value.

  2. Specify only a $key and omit the $value in order to retrieve an existing set value. The $key may also be an array of properties, which will return an array of values.

  3. Specify boolean true for $value to share the $key with the JS side. If the $key specified does not exist then $key=true will be added to the JS config (which can later be overwritten with another value, which will still be shared with the JS config). The $key property may also be an array of properties to specify multiple.

  4. Specify no params to retrieve in array of all existing set values.


// Set a property from PHP
$config->js('mySettings', [
  'foo' => 'bar',
  'bar' => 123,

// Get a property (from PHP)
$mySettings = $config->js('mySettings'); 
// Get a property (from Javascript):
var mySettings = ProcessWire.config.mySettings;


// basic usage
$array = $config->js();

// usage with all arguments
$array = $config->js($key = null, mixed $value = null);


key (optional)string, array

Property or array of properties

value (optional)mixed

Return value

array mixed null this

$config methods and properties

API reference based on ProcessWire core version 3.0.148

Twitter updates

  • This week we’ve got a couple of really useful API-side improvements to the core in 3.0.151, including predefined image settings and static language translation improvements— More
    21 February 2020
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    In the 302nd issue of ProcessWire Weekly we're going to dig into ProcessWire 3.0.151, introduce a new third party module called PrivacyWire, and showcase some interesting ProcessWire highlights from the past week or so. Read on!
    Weekly.pw / 22 February 2020
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