Sometimes we require to reset a canvas when we want to replace the graph with another set of data. that time simply resigning may cause issue, we can reomove and recreate elements for that purpose

reset_javascript_element.js

    function reset_element(element_id, element_type){
        var child = document.getElementById(div_id);
        var parent = child.parentElement;
        var new_child = document.createElement(element_type);
        parent.removeChild(child);
        new_child.setAttribute('id', div_id);
        parent.appendChild(new_child);
    }

    // <span id="my_canvas_id"></span>
    // <canvas id="my_span_id"></canvas>

    reset_element('my_canvas_id', 'canvas');
    reset_element('my_span_id', 'span');