How to draw dotted lines in googleMap

When creating a project, you may need to draw a prediction path, which is usually drawn by dotted lines. After checking for a long time, I found this demo on a googleMap official website on a colleague's recommendation. I will summarize the demo for you to refer to the Code for [javascript] functiondrawPrePath (... syntaxHighlighter is used to draw a prediction path in a project. Generally, it is drawn by dotted lines. After checking for a long time, I found this demo on a googleMap official website on a colleague's recommendation. I will summarize the demo for you to refer to the Code for [javascript] function drawPrePath (array, color) {var sorrow = {path: google. maps. symbolPath. FORWARD_CLOSED_ARROW // arrow}; var lineSymbol = {path:'m 0,-1 0, 1 ', strokeOpacity: 1, scale: 3}; var pathCoord = [new google. maps. latLng (37.772323,-122.214897), new google. maps. latLng (21.291982,-157.821856), new google. maps. latLng (-18.142599, 1 78.431), new google. maps. latLng (-27.46758, 153.027892)]; path = new google. maps. polyline ({path: pathCoord, strokeColor: "# 2d2d2d", strokeOpacity: 0, strokeWeight: 2, icons: [{icon: lineSymbol, offset: '0', repeat: '20px '}], map: map}); path. setMap (map);} key code: var lineSymbol = {path:'m 0,-1 ', strokeOpacity: 1, scale: 3}; key:'m 0, -1, ': Actually, this is the method for drawing the path of SVG. I still cannot explain the specific meaning. Learn svg tutorials by yourself!