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Listen for the page’s console event and call msg.type() on the ConsoleMessage object Puppeteer passes to your handler:
page.on('console', msg => {
console.log(msg.type());
});The result is a string identifying the console message category, such as 'error', 'warn' or 'log'.
Read a console message’s type
Puppeteer emits a ConsoleMessage through the page’s console event. Call type() on that event-provided object to get its category; use text() when you need the rendered message text.
page.on('console', msg => {
const type = msg.type();
const text = msg.text();
if (type === 'error') {
console.error('Page console error:', text);
}
});This example logs only messages categorized as 'error'. To inspect every console event, log both values without filtering. See the Puppeteer ConsoleMessage class reference and the ConsoleMessage.type() method reference.
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Which type strings can you check?
The Puppeteer ConsoleMessageType reference, labeled version 25.3.0, documents these values:
'log','debug','info','error'and'warn''dir','dirxml','table'and'trace''clear','startGroup','startGroupCollapsed'and'endGroup''assert','profile','profileEnd','count','timeEnd'and'verbose'
Compare against the exact string you want to handle, for example msg.type() === 'warn'. Because the documented set belongs to a versioned API, check the type reference matching the Puppeteer version installed in your project before relying on less common categories.
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Choose the right inspection method
The ConsoleMessage exposes several methods for different debugging needs. The class reference documents these methods and notes that its constructor is internal; use the object emitted by Puppeteer rather than trying to create one yourself.
type()returns the message category.text()returns the rendered message text.args()exposes the arguments passed to the console call.location()andstackTrace()provide source-location and stack information.
Common mistakes
- Using
text()as the category: it returns the message text, not its type. Comparemsg.type()to a category string instead. - Listening on the wrong event: attach a handler to the page’s
consoleevent to receiveConsoleMessageobjects. - Constructing a message yourself: Puppeteer marks the constructor internal. Inspect the object passed to the event handler.
- Assuming only three categories exist: the version 25.3.0 type reference lists additional values such as
'table','assert'and'verbose'.
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