OSM : programming line between two points with progress - php

Question

For an exercise/project in PHP, I have to program a route (with progression), but without being precise to the streets to be borrowed (as we know on GPS) but with lines between two points.
Example:
example route
The additional difficulty is to be able to display the progress on the line, starting from a percentage, the goal is therefore to have an image (like car, man or bicycle) on the straight line.
I have already worked with leaflet.js, but if another library is more appropriate I am taker.
I use this for the moment, for the points (Departure and arrival):
function placeMarkerDepartureArrival() {
// Departure
L.marker([varGPS[0].lat, varGPS[0].lng], {icon:myIconAD}).addTo(map);
// Arrival
L.marker([varGPS[1].lat, varGPS[1].lng], {icon:myIconAD}).addTo(map);
}
If you have any examples or site, I am taker.

Answer 1

Mapbox.js (based on the leaflet mapping library) has examples of animation and plotting lines on their documentation website, and has free tier for your exercise/project
Animating a point over a line
From the mapbox.js site:
map.addSource('point', {
"type": "geojson",
"data": pointOnCircle(0)
});
map.addLayer({
"id": "point",
"source": "point",
"type": "circle",
"paint": {
"circle-radius": 10,
"circle-color": "#007cbf"
}
});
function animateMarker(timestamp) {
// Update the data to a new position based on the animation timestamp. The
// divisor in the expression `timestamp / 1000` controls the animation speed.
map.getSource('point').setData(pointOnCircle(timestamp / 1000));
// Request the next frame of the animation.
requestAnimationFrame(animateMarker);
}
// Start the animation.
animateMarker(0);
Link to example