remove an edge in network vis.js - vis.js

Question

In vis.js, i can add easily an edge (ex function test) but i can't remove an existing edge (ex function test 1). Why ?
Unfortunately, i can't access now to documentation : "There isn't a GitHub Pages site here" for visjs.org. Thanks !
<input onclick=test() type="button" value="add edge 1 to 4 : ok">
<input onclick=test1() type="button" value="remove edge 1 to 2: not ok">
<div id="mynetwork"></div>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/vis/4.21.0/vis.js"></script>
<script type="text/javascript">
function test(){
data.edges.add([{from: 1, to: 4}]);
}
function test1(){
data.edges.remove([{from: 1, to: 2}]);
}
// GENERAL TEST
var nodes = [
{id: 1, label: 'Node 1'},
{id: 2, label: 'Node 2'},
{id: 3, label: 'Node 3'},
{id: 4, label: 'Node 4'}
];
var edges = [
{from: 1, to: 2},
{from: 1, to: 3},
{from: 2, to: 4}
];
nodesd = new vis.DataSet(nodes);
edgesd = new vis.DataSet(edges);
var container = document.getElementById('mynetwork');
var data = {
nodes: nodesd,
edges: edgesd
};
var options = {
nodes: {
size:15
},
edges: {
color: {
inherit: "both"
}
}
};
network = new vis.Network(container, data, options);
</script>

Answer 1

It's ok now !
I can do it with "id" for edges :
var edges = [
{id:1, from: 1, to: 2},
{id:2, from: 1, to: 3},
{id:3, from: 2, to: 4},
{id:4, from: 2, to: 5}
];
function test1(){
data.edges.remove([1]);
}

Answer 2

Here's an updated solution for anyone in the future that's stuck.
Let's say you initialized the network like so:
let network = new vis.Network(...);
let NODE_ID_1 = ...;
let NODE_ID_2 = ...;
Add a node connection:
network.body.data.edges.add({
'from': NODE_ID_1,
'to': NODE_ID_2
});
Remove a node connection:
let edges = network.getConnectedEdges(NODE_ID_1);
for(let edge of edges) {
if(NODE_ID_2 == network.body.edges[edge].to.id) {
network.body.data.edges.remove(edge);
break;
}
}
Helpful link: https://github.com/visjs/vis-network/blob/master/lib/network/modules/EdgesHandler.js