TextBox is a subclass of Marker. It draws a square box on the map with text content in it.
You should update textBox's boxStyle and textSymbol, and textBox's symbol will be updated automatically for display.
<!DOCTYPE html> <html> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Geometry - TextBox</title> <style type="text/css"> html,body{margin:0px;height:100%;width:100%} .container{width:100%;height:100%} </style> <link rel="stylesheet" href="https://unpkg.com/maptalks/dist/maptalks.css"> <script type="text/javascript" src="https://unpkg.com/maptalks/dist/maptalks.min.js"></script> <body> <div id="map" class="container"></div> <script> var map = new maptalks.Map('map', { center: [-0.113049, 51.498568], zoom: 14, baseLayer: new maptalks.TileLayer('base', { urlTemplate: 'https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png', subdomains: ["a","b","c","d"], attribution: '© <a href="http://osm.org">OpenStreetMap</a> contributors, © <a href="https://carto.com/">CARTO</a>' }) }); var textbox = new maptalks.TextBox( 'This is a textbox, with very long content', // content [-0.113049, 51.498568], // coordinate 200, // width 90, // height { 'draggable' : true, 'textStyle' : { 'wrap' : true, // auto wrap text 'padding' : [12, 8], // padding of textbox 'verticalAlignment' : 'top', 'horizontalAlignment' : 'right', 'symbol' : { 'textFaceName' : 'monospace', 'textFill' : '#34495e', 'textHaloFill' : '#fff', 'textHaloRadius' : 4, 'textSize' : 18, 'textWeight' : 'bold' } }, 'boxSymbol': { // box's symbol 'markerType' : 'square', 'markerFill' : 'rgb(135,196,240)', 'markerFillOpacity' : 0.9, 'markerLineColor' : '#34495e', 'markerLineWidth' : 1 } }); new maptalks.VectorLayer('vector', textbox).addTo(map); </script> </body> </html>