We need to define the HTML of the component at least once somewhere and that is done in the react method. However, that is equivalent to saying that we are manipulating the DOM inside the template section of a Vue component. You can argue that we are sort of manipulating the DOM inside the react method. Therefore, all the add_task event handler has to do is modify the todosattribute of todo_list for the result to be reflected on the page. Rendering on the server side means converting the object into a Python dictionary that is sent to the frontend in JSON format.Īny changes the event handlers or background task have made to attributes of the object, will be reflected on the page. This method is run automatically by the framework just before the component is rendered on the server side. The second method we modify is the react method. The _init_ method is modified to give a default value to the todos attribute of the component in case it is not specified as a keyword argument when an instance is created. In the component we only modify two methods and inherit all other methods. Button ( text = "Add Task", a = wp, click = add_task, style = "margin-left: 10px" ) return wp jp. ![]() Input ( placeholder = "Enter task", a = wp ) def add_task ( self, msg ): todo_list. WebPage ( tailwind = False ) todo_list = TodoList ( a = wp, todos = ) task = jp. Li ( text = todo, a = self ) def todo_app3 (): wp = jp. ![]() _init_ ( ** kwargs ) def react ( self, data ): self. Ol ): def _init_ ( self, ** kwargs ): self. TodoList inherits from Ol which is the JustPy class that represents the HTML ol tag. JustPy components are Python classes that inherit from more basic components. In the example below we define a component called TodoList. To get to full reactivity we need to create our own components. Yes, the view changes and we are not manipulating the DOM on the frontend, but we are changing instances of objects that represent the DOM on the server side. This is still not the full reactivity we are looking for. On the front end, Vue will update the view based on the new values (the WebPage is converted into a Python dictionary which is fed into Vue). ![]() When the Add Task button is clicked, the add_task event handler deletes the children of ol and recreates them based on the new value of todos. delete_components () for todo in todos : jp. Input ( placeholder = "Enter task", a = wp ) def add_task ( self, msg ): todos. Import justpy as jp def todo_app2 (): todos = wp = jp. Displaying Database Tables and Query Resultsįrom a Pandas DataFrame to a Web Site with an ag-Grid in 10 Lines of Python
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