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<?php |
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|
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namespace WPCoder\Optimization; |
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|
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// Exit if accessed directly. |
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defined( 'ABSPATH' ) || exit; |
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|
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class JSMinifier { |
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|
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public static function minify( $input ): string { |
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if ( trim( $input ) === "" ) { |
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return $input; |
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} |
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|
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return preg_replace( |
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array( |
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// Remove comment(s) |
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'#\s*("(?:[^"\\\]++|\\\.)*+"|\'(?:[^\'\\\\]++|\\\.)*+\')\s*|\s*\/\*(?!\!|@cc_on)(?>[\s\S]*?\*\/)\s*|\s*(?<![\:\=])\/\/.*(?=[\n\r]|$)|^\s*|\s*$#', |
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// Remove white-space(s) outside the string and regex |
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'#("(?:[^"\\\]++|\\\.)*+"|\'(?:[^\'\\\\]++|\\\.)*+\'|\/\*(?>.*?\*\/)|\/(?!\/)[^\n\r]*?\/(?=[\s.,;]|[gimuy]|$))|\s*([!%&*\(\)\-=+\[\]\{\}|;:,.<>?\/])\s*#s', |
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// Remove the last semicolon |
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'#;+\}#', |
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// Minify object attribute(s) except JSON attribute(s). From `{'foo':'bar'}` to `{foo:'bar'}` |
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'#([\{,])([\'])(\d+|[a-z_][a-z0-9_]*)\2(?=\:)#i', |
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// --ibid. From `foo['bar']` to `foo.bar` |
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'#([a-z0-9_\)\]])\[([\'"])([a-z_][a-z0-9_]*)\2\]#i' |
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), |
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array( |
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'$1', |
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'$1$2', |
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'}', |
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'$1$3', |
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'$1.$3' |
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), |
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$input ); |
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} |
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|
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} |
