webagg: Fix another too-early use of the WebSocket.

QuLogic · QuLogic · commit 725e908542a2 · 2020-12-16T17:50:09.000-05:00
Because this is behind the asynchronous `ResizeObserver`, it does _not_
cause a failure to initialize the JavaScript figure, but is similar in
error as the previous commit.
diff --git a/lib/matplotlib/backends/web_backend/js/mpl.js b/lib/matplotlib/backends/web_backend/js/mpl.js
@@ -224,7 +224,7 @@ mpl.figure.prototype._init_canvas = function () {
             // And update the size in Python. We ignore the initial 0/0 size
             // that occurs as the element is placed into the DOM, which should
             // otherwise not happen due to the minimum size styling.
-            if (width != 0 && height != 0) {
+            if (fig.ws.readyState == 1 && width != 0 && height != 0) {
                 fig.request_resize(width, height);
             }
         }

Original file line number	Diff line number	Diff line change
`@@ -224,7 +224,7 @@ mpl.figure.prototype._init_canvas = function () {`
`224`	`224`	`// And update the size in Python. We ignore the initial 0/0 size`
`225`	`225`	`// that occurs as the element is placed into the DOM, which should`
`226`	`226`	`// otherwise not happen due to the minimum size styling.`
`227`		`- if (width != 0 && height != 0) {`
	`227`	`+ if (fig.ws.readyState == 1 && width != 0 && height != 0) {`
`228`	`228`	`fig.request_resize(width, height);`
`229`	`229`	`}`
`230`	`230`	`}`