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feat: Add Mixpanel Session Replay settings support #52

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feat: Add Mixpanel Session Replay settings support #52

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e8922ec
feat: Add Mixpanel Session Replay settings support
jaissica12 Dec 4, 2025
0bee482
add Session Replay settings validation tests
jaissica12 Dec 15, 2025
52866e6
remove range check from sessionPercent and update test
jaissica12 Dec 19, 2025
f2c2ed0
refactor boolean, numeric and string session replay settings
jaissica12 Dec 19, 2025
d3ae4f2
added utility function parseIntSafe
jaissica12 Dec 19, 2025
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78 changes: 72 additions & 6 deletions src/MixpanelEventForwarder.js
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Original file line number Diff line number Diff line change
Expand Up @@ -62,13 +62,74 @@ var constructor = function () {
if (!testMode) {
renderSnippet();
}
mixpanel.init(
settings.token,
// Build init options object
var initOptions = {
api_host: forwarderSettings.baseUrl,
};

// Session Replay boolean settings
var boolSettings = [
{ key: 'recordHeatmapData', mappedKey: 'record_heatmap_data' },
{ key: 'autocapture', mappedKey: 'autocapture' },
{ key: 'recordCanvas', mappedKey: 'record_canvas' },
];

// Session Replay numeric settings
var numericSettings = [
{
api_host: forwarderSettings.baseUrl,
key: 'recordSessionsPercent',
mappedKey: 'record_sessions_percent',
},
'mparticle'
);
{
key: 'recordIdleTimeoutMs',
mappedKey: 'record_idle_timeout_ms',
},
{ key: 'recordMaxMs', mappedKey: 'record_max_ms' },
{ key: 'recordMinMs', mappedKey: 'record_min_ms' },
];

// Session Replay string settings
var stringSettings = [
{
key: 'recordMaskTextSelector',
mappedKey: 'record_mask_text_selector',
},
{
key: 'recordBlockSelector',
mappedKey: 'record_block_selector',
},
{ key: 'recordBlockClass', mappedKey: 'record_block_class' },
{
key: 'recordMaskTextClass',
mappedKey: 'record_mask_text_class',
},
];

// Process boolean settings
boolSettings.forEach(function (setting) {
if (forwarderSettings[setting.key] != null) {
initOptions[setting.mappedKey] =
forwarderSettings[setting.key] === 'True';
}
});

// Process numeric settings
numericSettings.forEach(function (setting) {
var numericValue = parseIntSafe(forwarderSettings[setting.key]);
if (numericValue !== undefined) {
initOptions[setting.mappedKey] = numericValue;
}
});

// Process string settings
stringSettings.forEach(function (setting) {
if (forwarderSettings[setting.key]) {
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@alexs-mparticle alexs-mparticle Dec 19, 2025

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Any reason why you're not checkign != null here?

If this was missed, we could make a simple utility function to make this a little readable.

function hasValue(obj, key) {
    return obj[key] != null;
}

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@jaissica12 jaissica12 Dec 19, 2025

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I didn't add != null for string settings as it would allow empty strings like recordMaskTextSelector: '' to pass through to Mixpanel, which would break test like "should ignore empty string values for privacy selectors".

initOptions[setting.mappedKey] =
forwarderSettings[setting.key];
}
});

mixpanel.init(settings.token, initOptions, 'mparticle');

isInitialized = true;

Expand Down Expand Up @@ -193,7 +254,7 @@ var constructor = function () {
// When mParticle identifies a user, because the user might
// actually be anonymous, we only want to send an
// identify request to Mixpanel if the user is
// actually known. If a user has any user identities, they are
// actually known. If a user has any user identities, they are
// considered to be "known" users.
var userIdentities = getUserIdentities(user);

Expand Down Expand Up @@ -394,6 +455,11 @@ function isObject(val) {
);
}

function parseIntSafe(value) {
var n = parseInt(value, 10);
return isNaN(n) ? undefined : n;
}

if (typeof window !== 'undefined') {
if (window && window.mParticle && window.mParticle.addForwarder) {
window.mParticle.addForwarder({
Expand Down
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