Arran Fortuna: Created page with "NOTOC {{Client event}} This event is triggered when a browser outputs a console message, such as a JavaScript error or a message written using console.log(). ==Parameters== string message, string source, int line, int level '''message''': the console message. '''source''': the URL or source identifier where the message originated. '''line''': the line number where the message originated. '''leve..."

2026-09-16T09:58:04Z

Created page with "__NOTOC__ {{Client event}} This event is triggered when a browser outputs a console message, such as a JavaScript error or a message written using console.log(). ==Parameters== <syntaxhighlight lang="lua"> string message, string source, int line, int level </syntaxhighlight> *'''message''': the console message. *'''source''': the URL or source identifier where the message originated. *'''line''': the line number where the message originated. *'''leve..."

New page

__NOTOC__
{{Client event}}
This event is triggered when a [[Element/Browser|browser]] outputs a console message, such as a JavaScript error or a message written using console.log().

==Parameters==
<syntaxhighlight lang="lua">
string message, string source, int line, int level
</syntaxhighlight>
*'''message''': the console message.
*'''source''': the URL or source identifier where the message originated.
*'''line''': the line number where the message originated.
*'''level''': the severity level of the message:
**'''0''': default
**'''1''': verbose
**'''2''': info
**'''3''': warning
**'''4''': error
**'''5''': fatal
**'''6''': disable

==Source==
The [[event system#Event source|source]] of this event is the [[Element/Browser|browser]] element that generated the console message.

{{Note|The ''source'' parameter is a string identifying the message's origin. It is separate from the event's ''source'' variable, which refers to the browser element. Use a different parameter name, such as ''messageSource'', to access both.}}

==Example==
This example loads a local HTML page and prints its browser console messages to the debug output.

'''Client-side Lua:'''
<syntaxhighlight lang="lua">
local browser = createBrowser(25, 25, true, false)

local logLevels = {
[0] = "default",
[1] = "verbose",
[2] = "info",
[3] = "warning",
[4] = "error",
[5] = "fatal",
[6] = "disable"
}

addEventHandler("onClientBrowserConsoleMessage", browser, function(message, messageSource, line, level)
outputDebugString(("Browser console message: %s (line: %d, source: %s, level: %s)"):format(
message, line, messageSource, logLevels[level] or tostring(level)
))
end)

addEventHandler("onClientBrowserCreated", browser, function()
loadBrowserURL(browser, "http://mta/local/test.html")
end)
</syntaxhighlight>

'''test.html:'''
<syntaxhighlight lang="html">
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Browser console example</title>
</head>
<body>
<script>
console.log("Hello from the browser!");
console.warn("This is a warning.");
console.error("This is an error.");
</script>
</body>
</html>
</syntaxhighlight>

Include the HTML file in your resource's '''meta.xml''':
<syntaxhighlight lang="xml">
<file src="test.html" />
</syntaxhighlight>

Use '''/debugscript 3''' to view the output.

==See also==
{{CEF_events}}

OnClientBrowserConsoleMessage - Revision history