How do you insert an external script using gatsby-browser?

[daydream05]

Summary

I would like to external scripts that would work after the React Dom is rendered. In addition, I would only like it loaded on specific pages.

Relevant information

I'm trying to load an external script that uses the global document. It works locally but I keep getting a WebpackError: ReferenceError: document is not defined when deployed on Netlify. I've tried using React-Helmet but I was running into this issue nfl/react-helmet#324 .

File contents (if changed)

gatsby-config.js: N/A
package.json: N/A
gatsby-node.js: N/A
gatsby-browser.js

const perlinNoise = require('./static/perlin-noise')

const insertJS = () => {
  const addJS = (src) => {
    const s = document.createElement(`script`)
    s.type = `text/javascript`
    s.src = src
    document.getElementsByTagName(`head`)[0].appendChild(s)
  }

  addJS(perlinNoise)
}

exports.onInitialClientRender = () => {
  insertJS()
}

gatsby-ssr.js: N/A

[rotexhawk]

React helmet is a great package for that. You can place it in your page/template or other react components.

https://github.com/nfl/react-helmet#readme

[daydream05]

Sorry if I didn't I make it clear, I mentioned on my original post that I'm running into this exact issue nfl/react-helmet#324 with react-helmet. According to one of the comments, they were also using gatsbyjs and they ended up using exports.onInitialClientRenderer to make it work.

[rotexhawk]

No problem, for that you can put your js file in the static folder and include it like this. See here:
https://www.gatsbyjs.org/docs/static-folder/

<Helmet>
<script src={withPrefix('test.js')} />
</Helmet>

[sidharthachatterjee]

@daydream05 Since the external script you're referring to uses document and since you'd like to execute after render, the best place to put it would be onInitialClientRender in gatsby-browser.js

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[cbfrance]

For future visitors: I had a similar problem and what worked for me was to load my (remote) script using a plugin, gatsby-plugin-load-script.

https://www.gatsbyjs.org/packages/gatsby-plugin-load-script/

The instructions on that page are currently just an example Sentry but you only really need to use the src like this:

      resolve: "gatsby-plugin-load-script",
      options: {
        src: "https://url-of-script.min.js",
      },
    },```

[alisonbuki]

The above solution works for me - had been trying to get Lottie to load in the browser via CDN once the DOM content had been rendered, and nothing else I tried, including everything in the current Gatsby docs, worked. Thank you @christopherfrance for the tip!

[ReeganExE]

Uncaught TypeError: Cannot read property 'fn' of undefined

Script tags should be placed at the end of page.

Whereas Helmet and gatsby-plugin-load-script try to append script into the head (see link).

Basically, you just need a gatsby-ssr.js file like this, no need plugin at all.

Create gatsby-ssr.js

import React from 'react'

export const onRenderBody = ({ setPostBodyComponents }) => {
  setPostBodyComponents([
    <script
      key="https://code.jquery.com/jquery-3.2.1.slim.min.js"
      src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
      integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
      crossOrigin="anonymous"
      defer
    />,
    <script
      key="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
      src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
      integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
      crossOrigin="anonymous"
      defer
    />,
    <script
      key="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
      src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
      integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
      crossOrigin="anonymous"
      defer
    />
  ])
}

[BhushanPatil5]

Uncaught TypeError: Cannot read property 'fn' of undefined

Script tags should be placed at the end of page.

Whereas Helmet and gatsby-plugin-load-script try to append script into the head (see link).

Basically, you just need a gatsby-ssr.js file like this, no need plugin at all.

Create gatsby-ssr.js

import React from 'react'

export const onRenderBody = ({ setPostBodyComponents }) => {
  setPostBodyComponents([
    <script
      key="https://code.jquery.com/jquery-3.2.1.slim.min.js"
      src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
      integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
      crossOrigin="anonymous"
      defer
    />,
    <script
      key="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
      src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
      integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
      crossOrigin="anonymous"
      defer
    />,
    <script
      key="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
      src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
      integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
      crossOrigin="anonymous"
      defer
    />
  ])
}

What if the same files i want to add gatsby-browser.js ?
i want to add those all files to common.js for avoiding unwanted network call for each file.
THANKS

[Jaikant]

Uncaught TypeError: Cannot read property 'fn' of undefined

Script tags should be placed at the end of page.

Whereas Helmet and gatsby-plugin-load-script try to append script into the head (see link).

Basically, you just need a gatsby-ssr.js file like this, no need plugin at all.

Create gatsby-ssr.js

import React from 'react'

export const onRenderBody = ({ setPostBodyComponents }) => {
  setPostBodyComponents([
    <script
      key="https://code.jquery.com/jquery-3.2.1.slim.min.js"
      src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
      integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
      crossOrigin="anonymous"
      defer
    />,
    <script
      key="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
      src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
      integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
      crossOrigin="anonymous"
      defer
    />,
    <script
      key="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
      src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
      integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
      crossOrigin="anonymous"
      defer
    />
  ])
}

Love this answer!
@ReeganExE Just a question, does this mean the script will be loaded on every page transition or it is loaded only once?

[SNandini8698]

Hi, I am a newbie to gatsby. Can anyone help me by proving me an example repository that explains adding multiple external javascript files into a gatsby site and using them?

Thanks in advance.

[sfonua10]

@SNandini8698 the answer above shows how to pull in external javascript files

[kusaljay]

I tried gatsby-browser.js and gatsby-ssr.js methods but neither worked well for me.
The solution below with creating a custom hook worked perfectly for me.
https://stackoverflow.com/questions/63193411/using-jquery-and-external-scripts-in-gatsby