#3192 Adding docs and visual test

cypress/integration/rendering/flowchart-v2.spec.js

@@ -670,6 +670,17 @@ title: Simple flowchart
 ---
 flowchart TD
 A --> B
+`,
+      { titleTopMargin: 0 }
+    );
+  });
+  it('3192: It should be possieble to render flowcharts with invisisble edges', () => {
+    imgSnapshotTest(
+      `---
+title: Simple flowchart with invisisble edges
+---
+flowchart TD
+A ~~~ B
 `,
       { titleTopMargin: 0 }
     );

packages/mermaid/src/docs/syntax/flowchart.md

@@ -245,6 +245,15 @@ flowchart LR
    A == text ==> B
 ```
 
+### An invisisble link
+
+This can be a usefull tool in some instances where you want to alter the default positining of a node.
+
+```mermaid-example
+flowchart LR
+    A ~~~ B
+```
+
 ### Chaining of links
 
 It is possible declare many links in the same line as per below: