Use CanvasLineJoin type instead of string

src/ol/render/canvas.js

@@ -21,7 +21,7 @@ import LabelCache from './canvas/LabelCache.js';
  * @property {string} [currentLineCap]
  * @property {Array<number>} currentLineDash
  * @property {number} [currentLineDashOffset]
- * @property {string} [currentLineJoin]
+ * @property {CanvasLineJoin} [currentLineJoin]
  * @property {number} [currentLineWidth]
  * @property {number} [currentMiterLimit]
  * @property {number} [lastStroke]
@@ -30,7 +30,7 @@ import LabelCache from './canvas/LabelCache.js';
  * @property {string} [lineCap]
  * @property {Array<number>} lineDash
  * @property {number} [lineDashOffset]
- * @property {string} [lineJoin]
+ * @property {CanvasLineJoin} [lineJoin]
  * @property {number} [lineWidth]
  * @property {number} [miterLimit]
  */
@@ -41,7 +41,7 @@ import LabelCache from './canvas/LabelCache.js';
  * @property {string} lineCap
  * @property {Array<number>} lineDash
  * @property {number} lineDashOffset
- * @property {string} lineJoin
+ * @property {CanvasLineJoin} lineJoin
  * @property {number} lineWidth
  * @property {number} miterLimit
  * @property {import("../colorlike.js").ColorLike} strokeStyle
@@ -113,7 +113,7 @@ export const defaultLineDashOffset = 0;
 
 /**
  * @const
- * @type {string}
+ * @type {CanvasLineJoin}
  */
 export const defaultLineJoin = 'round';
 

src/ol/render/canvas/Executor.js

@@ -208,7 +208,7 @@ class Executor extends Disposable {
         context.strokeStyle = strokeState.strokeStyle;
         context.lineWidth = strokeWidth;
         context.lineCap = /** @type {CanvasLineCap} */ (strokeState.lineCap);
-        context.lineJoin = /** @type {CanvasLineJoin} */ (strokeState.lineJoin);
+        context.lineJoin = strokeState.lineJoin;
         context.miterLimit = strokeState.miterLimit;
         if (context.setLineDash && strokeState.lineDash.length) {
           context.setLineDash(strokeState.lineDash);

src/ol/render/canvas/Immediate.js

@@ -697,7 +697,7 @@ class CanvasImmediateRenderer extends VectorContext {
         context.setLineDash(strokeState.lineDash);
         context.lineDashOffset = strokeState.lineDashOffset;
       }
-      context.lineJoin = /** @type {CanvasLineJoin} */ (strokeState.lineJoin);
+      context.lineJoin = strokeState.lineJoin;
       context.lineWidth = strokeState.lineWidth;
       context.miterLimit = strokeState.miterLimit;
       context.strokeStyle = strokeState.strokeStyle;
@@ -724,7 +724,7 @@ class CanvasImmediateRenderer extends VectorContext {
         }
       }
       if (contextStrokeState.lineJoin != strokeState.lineJoin) {
-        contextStrokeState.lineJoin = context.lineJoin = /** @type {CanvasLineJoin} */ (strokeState.lineJoin);
+        contextStrokeState.lineJoin = context.lineJoin = strokeState.lineJoin;
       }
       if (contextStrokeState.lineWidth != strokeState.lineWidth) {
         contextStrokeState.lineWidth = context.lineWidth = strokeState.lineWidth;