AI-generated Key Takeaways
-
The
destroy
hook is called when a block is deleted from the workspace. -
It can be used to clean up data models or external resources.
-
The
destroy
hook can be defined using a mixin in JSON or directly in the block's JavaScript definition. -
The
destroy
method runs after the block's parent is disposed but before children or fields are.
Blocks have a destroy
hook, which is called when they are deleted from the
workspace. This can be used to destroy any backing data models or external
resources associated with the block that are no longer needed.
JSON
{
// ...,
"extensions":["destroy"],
}
Blockly.Extensions.registerMixin('destroy', {
destroy: function() {
this.myResource.dispose();
}
});
In JSON, define a destroy
hook with a
mixin.
JavaScript
Blockly.Blocks['block_type'] = {
destroy: function() {
this.myResource.dispose();
}
}
The destroy
method is called after the block's parent has been disposed, but
before any of its children or fields have been disposed.