eslint: enforce use of const when variable not modified

src/svgcanvas/draw.js

@@ -1020,7 +1020,7 @@ export const setContext = function (elem) {
 
   // Disable other elements
   const parentsUntil = getParentsUntil(elem, '#svgcontent');
-  let siblings = [];
+  const siblings = [];
   parentsUntil.forEach(function (parent) {
     const elements = Array.prototype.filter.call(parent.parentNode.children, function(child){
       return child !== parent;

src/svgcanvas/svgcanvas.js

@@ -209,7 +209,7 @@ class SvgCanvas {
         return this._storage.has(element) && this._storage.get(element).has(key);
       },
       remove: function (element, key) {
-        let ret = this._storage.get(element).delete(key);
+        const ret = this._storage.get(element).delete(key);
         if (!this._storage.get(element).size === 0) {
           this._storage.delete(element);
         }
@@ -555,7 +555,7 @@ class SvgCanvas {
 
     const restoreRefElems = function (elem) {
       // Look for missing reference elements, restore any found
-      let attrs = {};
+      const attrs = {};
       refAttrs.forEach(function (item, _) {
         attrs[item] = elem.getAttribute(item);
       });

src/svgcanvas/utilities.js

@@ -576,7 +576,7 @@ function groupBBFix(selected) {
   let ret; let copy;
 
   if (ref) {
-    let elements = [];
+    const elements = [];
     Array.prototype.forEach.call(ref.children, function (el) {
       const elem = el.cloneNode(true);
       elem.setAttribute('visibility', 'hidden');