JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/Turf.js/5.1.5/turf.min.js"></script>

JavaScript

geojson = {
type: "Feature",
properties: { },
geometry: {
type: "MultiLineString",
coordinates: [
[
[
-77.031669,
38.878605
],
[
-77.029609,
38.881946
],
[
-77.020339,
38.884084
],
[
-77.025661,
38.885821
],
[
-77.021884,
38.889563
],
[
-77.019824,
38.892368
]
],
[
[
-77.041669,
38.885821
],
[
-77.039609,
38.881946
],
[
-77.030339,
38.884084
],
[
-77.035661,
38.878605
]
]
]
}
}

var point1 = turf.along(geojson,1,{units: 'miles'});
var point2 = turf.along(geojson.geometry,1,{units: 'miles'});
console.log(point1,point2);