Change the Theme of Antd when using GatsbyJS

Question

This GatsbyJS/antd plugin page (https://github.com/bskimball/gatsby-plugin-antd/issues/2) makes it seem that there is a way to edit ant.design (antd) themes when using GatsbyJS. The code that is provided is

plugins: [
  {
      resolve: 'gatsby-plugin-antd',
      options: {
        style: true
      }
  }
]

But there is no additional information. Where would one make changes to things like the theme primary color (as described: https://ant.design/docs/react/customize-theme). The ant.design page (https://ant.design/docs/react/customize-theme) says to make the primary color change by doing the following:

"theme": {
  "primary-color": "#1DA57A",
},

It is not clear in what file such a variable would be set in GatbsyJS.

Answer 1

GitHub repo with an example: https://github.com/uciska/gatsby-less-v2. To get Antd working changes must be made to three Gatsby files.

Example gastby-config.js:

module.exports = {
  siteMetadata: {
    title: 'My site'
  },
  plugins: [
    {
      resolve: `gatsby-plugin-less`,
      options: {
        javascriptEnabled: true,
        modifyVars: {
          'primary-color': '#da3043',
          'font-family': 'Arial',
          'layout-body-background': '#66ff79'
        }
      }
    }
  ]
}

Example gastby-node.js:

exports.onCreateBabelConfig = ({ actions }) => {
  actions.setBabelPlugin({
    name: 'babel-plugin-import',
    options: {
      libraryName: 'antd',
      style: true
    }
  })
}

Example package.json:

{
  "name": "gatsby-starter-hello-world",
  "description": "Gatsby hello world starter",
  "license": "MIT",
  "scripts": {
    "develop": "gatsby develop",
    "build": "gatsby build",
    "serve": "gatsby serve"
  },
  "dependencies": {
    "antd": "^3.6.4",
    "babel-plugin-import": "^1.8.0",
    "gatsby": "next",
    "gatsby-plugin-less": "next",
    "less": "^3.0.4",
    "less-loader": "^4.1.0",
    "react": "^16.3.2",
    "react-dom": "^16.3.2",
    "react-apollo": "^2.1.11"
  }
}

Answer 2

I have tried all of the above answers which were written a few years back, but it didn't work. After researching for a couple of hours, finally, I was able to modify antd default vars with gatsby. Here is the solution:

gatsby-config.js

[
...
...
   {
      resolve: "gatsby-plugin-antd",
      options: {
        style: true,
      },
    },

    {
      resolve: "gatsby-plugin-less",
      options: {
        lessOptions: {
          modifyVars: { //direct child node of lessOptions
            "primary-color": "#C53333", //your preferred color
          },
          javascriptEnabled: true, //direct child node of lessOptions
        },
      },
    },

]

less and less-loader are NOT required to modify default antd vars.

package.json

"dependencies": {
  "antd": "^4.12.2",
  "gatsby-plugin-antd": "^2.2.0",
  "gatsby-plugin-less": "^4.7.0",
}

side note: Find all the ant-design default vars here