//Set icon item
setIcon("minecraft:grass")

//Set title String
setTitle("Left clicking a block")

//Set description String
setDescription("Left click a grass block")

//Set the parent advancement. The syntax is "modid:folder/path/to/the/advancement/then/filename"
setParent("triumph:example/root")

//Adds criteria named "clickedBlock" with the trigger type "triumph:left_click_block". This function returns the criteria as an object
criteria = addCriteria("clickedBlock", "triumph:left_click_block")

//Sets the required block for the criteria. This is the block that needs to be left clicked by the player. First variable is the block name, second is the metadata and is not required.
criteria.setBlock("minecraft:grass")