I am building a prism plugin to highlight the code syntaxes. In existing code block there is already a sidebar option with Additional Class Name but i have to manually enter the class name for the syntaxes. Like for php syntaxes i have to add language-php and so on. To prevent this issue a added a additional sidebar option for code block only that is a drop down with all the supported languages class names.
But now the issue is when i am trying to extend the existing classname i got the validation error.
export function addSaveProps( extraProps, blockType, attributes ) {
// If the current block is valid, add our prop.
if ( isValidBlockType( blockType.name ) ) {
if( "undefined" != typeof attributes.prismClass &&
attributes.prismClass.length ) {
//extraProps.prismClass = attributes.prismClass;
extraProps.className = attributes.className+" "+attributes.prismClass;
}
}
return extraProps;
}
But with the above code I got the following error:
blocks.min.js?ver=6.0.4:2 Block validation: Block validation failed for
core/code
Is there any way to extend the existing class?