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Add nonce parameter to the initialize function #83

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Add nonce parameter to the initialize function #83

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ead5caf
feat: add nonce
lmaillet Mar 9, 2021
657927b
test: nonce
lmaillet Mar 9, 2021
ab9f793
doc: readme
lmaillet Mar 9, 2021
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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -205,6 +205,7 @@ Look for gtm_auth and gtm_preview
|events| `Object`| No | Additional events such as 'gtm.start': new Date().getTime(),event:'gtm.js'.|
|auth| `String` | No | used to set environments. |
|preview| `String` | No | used to set environments, something like `env-00`. |
|nonce| `String` | No | used to add a [nonce](https://developers.google.com/tag-manager/web/csp) |


### Note:
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12 changes: 8 additions & 4 deletions src/TagManager.js
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Expand Up @@ -15,8 +15,11 @@ const TagManager = {
return noscript
}

const script = () => {
const script = (nonce) => {
const script = document.createElement('script')
if (nonce) {
script.setAttribute('nonce', nonce);
}
script.innerHTML = snippets.script
return script
}
Expand All @@ -29,17 +32,18 @@ const TagManager = {
dataScript
}
},
initialize: function ({ gtmId, events = {}, dataLayer, dataLayerName = 'dataLayer', auth = '', preview = '' }) {
initialize: function ({ gtmId, events = {}, dataLayer, dataLayerName = 'dataLayer', auth = '', preview = '', nonce = undefined }) {
const gtm = this.gtm({
id: gtmId,
events: events,
dataLayer: dataLayer || undefined,
dataLayerName: dataLayerName,
auth,
preview
preview,
nonce
})
if (dataLayer) document.head.appendChild(gtm.dataScript)
document.head.insertBefore(gtm.script(), document.head.childNodes[0])
document.head.insertBefore(gtm.script(nonce), document.head.childNodes[0])
document.body.insertBefore(gtm.noScript(), document.body.childNodes[0])
},
dataLayer: function ({dataLayer, dataLayerName = 'dataLayer'}) {
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12 changes: 12 additions & 0 deletions src/__tests__/TagManager.spec.js
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Expand Up @@ -16,4 +16,16 @@ describe('TagManager', () => {
TagManager.initialize(gtmArgs)
expect(window.dataLayer).toHaveLength(1)
})

it('should render tagmanager with nonce', () => {
TagManager.initialize({gtmId: 'GTM-000000', nonce: 'foo'})
const scripts = window.document.getElementsByTagName('script');
expect(scripts[0].nonce).toBe('foo');
})

it('should render tagmanager without nonce', () => {
TagManager.initialize({gtmId: 'GTM-000000'})
const scripts = window.document.getElementsByTagName('script');
expect(scripts[0].nonce).toBe('');
})
})