I have a gatsby-ssr.js with an onRenderBody that doesn't get run during gatsby develop or gatsby build.
repro: https://github.com/GraphQLGuide/book/tree/repro-no-ssr
ON FILE LOAD is printed during gatsby build, but ON RENDER BODY isn't: gatsby-ssr.js
Have you tried ES6 notation?
Instead of :
exports.onRenderBody = (
{ setHeadComponents, pathname = `/` },
{ crossOrigin = `anonymous` } = {}
) => {
Do:
import React from "react"
export const onRenderBody = (
{ setHeadComponents, pathname = `/` },
{ crossOrigin = `anonymous` } = {}
) => {
It seems that some webpack versions prevent the triggering of some SSR functions.
Interesting/related threads: