sharepoint Working with JavaScript Client Object Model (JSOM) Delete an item in a list
Example
SP.SOD.executeOrDelayUntilScriptLoaded( function(){ deleteItem(1); }, "sp.js");
function deleteItem(id){
var clientContext = new SP.ClientContext();
var list = clientContext.get_web().get_lists().getByTitle("List Title");
var item = list.getItemById(id);
item.deleteObject();
clientContext.executeQueryAsync(function(){
alert("Item #"+id+" deleted successfully!");
},function(sender,args){alert(args.get_message());});
}
