documentation: add JS api docs

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
(cherry picked from commit d9452d1157aef6b8752fac0f4ed1e0b9221abb31)

1 files changed, 25 insertions, 0 deletions

diff --git a/documentation/jsapi/scripts/linenumber.js b/documentation/jsapi/scripts/linenumber.js
new file mode 100644
index 000000000..4354785ce
--- /dev/null
+++ b/documentation/jsapi/scripts/linenumber.js
@@ -0,0 +1,25 @@
+/*global document */
+(() => {
+    const source = document.getElementsByClassName('prettyprint source linenums');
+    let i = 0;
+    let lineNumber = 0;
+    let lineId;
+    let lines;
+    let totalLines;
+    let anchorHash;
+
+    if (source && source[0]) {
+        anchorHash = document.location.hash.substring(1);
+        lines = source[0].getElementsByTagName('li');
+        totalLines = lines.length;
+
+        for (; i < totalLines; i++) {
+            lineNumber++;
+            lineId = `line${lineNumber}`;
+            lines[i].id = lineId;
+            if (lineId === anchorHash) {
+                lines[i].className += ' selected';
+            }
+        }
+    }
+})();