fix #357; ignore null transform (#403)

Fil · web-flow · commit 4dabda084fd1 · 2021-07-31T08:47:44.000-07:00
diff --git a/src/plot.js b/src/plot.js
@@ -35,7 +35,7 @@ export function plot(options = {}) {
       if (scale !== undefined) {
         const scaled = scaleChannels.get(scale);
         const {percent, transform = percent ? x => x * 100 : undefined} = options[scale] || {};
-        if (transform !== undefined) channel.value = Array.from(channel.value, transform);
+        if (transform != null) channel.value = Array.from(channel.value, transform);
         if (scaled) scaled.push(channel);
         else scaleChannels.set(scale, [channel]);
       }

Original file line number	Diff line number	Diff line change
`@@ -35,7 +35,7 @@ export function plot(options = {}) {`
`35`	`35`	`if (scale !== undefined) {`
`36`	`36`	`const scaled = scaleChannels.get(scale);`
`37`	`37`	`const {percent, transform = percent ? x => x * 100 : undefined} = options[scale] \|\| {};`
`38`		`- if (transform !== undefined) channel.value = Array.from(channel.value, transform);`
	`38`	`+ if (transform != null) channel.value = Array.from(channel.value, transform);`
`39`	`39`	`if (scaled) scaled.push(channel);`
`40`	`40`	`else scaleChannels.set(scale, [channel]);`
`41`	`41`	`}`