fix Logo没有链接时，不进行跳转

Author: chenxianhuii

src/leaflet/control/Logo.js

@@ -76,8 +76,8 @@ export var Logo = L.Control.extend({
             }
         }
         var link = this.options.link;
-        div.innerHTML = "<a href='" + link + "' target='_blank' style='border: none;display: block;'>" +
-            "<img src=" + imgSrc + " alt='" + alt + "' style='border: none;" + styleSize + "margin-right:5px;margin-bottom:2px;white-space: nowrap'></a>";
+        var imgElement = "<img src=" + imgSrc + " alt='" + alt + "' style='border: none;" + styleSize + "margin-right:5px;margin-bottom:2px;white-space: nowrap'>";
+        div.innerHTML = link ? "<a href='" + link + "' target='_blank' style='border: none;display: block;'>" + imgElement + "</a>" : imgElement;
         return div;
     }
 });

src/mapboxgl/control/Logo.js

@@ -70,8 +70,8 @@ export class Logo {
             }
         }
         var link = this.link;
-        this._container.innerHTML = "<a href='" + link + "' target='_blank'>" +
-            "<img src=" + imgSrc + " alt='" + alt + "' style='" + styleSize + "margin-bottom: 2px'></a>";
+        var imgElement = "<img src=" + imgSrc + " alt='" + alt + "' style='" + styleSize + "margin-bottom: 2px'>";
+        this._container.innerHTML = link ? "<a href='" + link + "' target='_blank'>" + imgElement + "</a>" : imgElement;
         this._createStyleSheet();
         return this._container;
     }

src/maplibregl/control/Logo.js

@@ -69,8 +69,8 @@
              }
          }
          var link = this.link;
-         this._container.innerHTML = "<a href='" + link + "' target='_blank'>" +
-             "<img src=" + imgSrc + " alt='" + alt + "' style='" + styleSize + "margin-bottom: 2px'></a>";
+         var imgElement = "<img src=" + imgSrc + " alt='" + alt + "' style='" + styleSize + "margin-bottom: 2px'>";
+         this._container.innerHTML = link ? "<a href='" + link + "' target='_blank'>" + imgElement + "</a>" : imgElement;
          this._createStyleSheet();
          return this._container;
      }

src/openlayers/control/Logo.js

@@ -63,10 +63,8 @@ export class Logo extends Control {
                     styleSize = "";
                 }
             }
-
-
-            div.innerHTML = "<a href='" + link + "' target='_blank' style='border: none;display: block;'>" +
-                "<img src=" + imgSrc + " alt='" + alt + "'  style='border: none;" + styleSize + "white-space: nowrap;margin-bottom: 2px'></a>";
+            var imgElement = "<img src=" + imgSrc + " alt='" + alt + "'  style='border: none;" + styleSize + "white-space: nowrap;margin-bottom: 2px'>";
+            div.innerHTML = link ? "<a href='" + link + "' target='_blank' style='border: none;display: block;'>" + imgElement + "</a>" : imgElement;
             return div;
         }
 

test/mapboxgl/control/LogoSpec.js

@@ -63,8 +63,10 @@ describe('mapboxgl_Logo', () => {
         var onAdd = logo1.onAdd(map);
         expect(onAdd).not.toBeNull();
         expect(onAdd.nodeName).toBe("DIV");
+        expect(onAdd.querySelector('a')).toBeNull;
         // options2 - imageUrl,width
         var options2 = {
+            link: "http://test.com",
             imageUrl: "http://test.com/test.png",
             width: 20
         };
@@ -75,5 +77,6 @@ describe('mapboxgl_Logo', () => {
         var onAdd2 = logo2.onAdd(map);
         expect(onAdd2).not.toBeNull();
         expect(onAdd2.nodeName).toBe("DIV");
+        expect(onAdd2.querySelector('a')).not.toBeNull;
     });
 });