Production Error Code Reference

Runtime Errors

In production builds, the 3rd argument passed to the following error handler APIs will be a short code instead of the full information string:

The following table maps the codes to their original full information strings.

Code	Message
0	setup function
1	render function
2	watcher getter
3	watcher callback
4	watcher cleanup function
5	native event handler
6	component event handler
7	vnode hook
8	directive hook
9	transition hook
10	app errorHandler
11	app warnHandler
12	ref function
13	async component loader
14	scheduler flush. This is likely a Vue internals bug. Please open an issue at https://github.com/vuejs/core .
sp	serverPrefetch hook
bc	beforeCreate hook
c	created hook
bm	beforeMount hook
m	mounted hook
bu	beforeUpdate hook
u	updated
bum	beforeUnmount hook
um	unmounted hook
a	activated hook
da	deactivated hook
ec	errorCaptured hook
rtc	renderTracked hook
rtg	renderTriggered hook

Compiler Errors

The following table provides a mapping of the production compiler error codes to their original messages.

Code	Message
0	Illegal comment.
1	CDATA section is allowed only in XML context.
2	Duplicate attribute.
3	End tag cannot have attributes.
4	Illegal '/' in tags.
5	Unexpected EOF in tag.
6	Unexpected EOF in CDATA section.
7	Unexpected EOF in comment.
8	Unexpected EOF in script.
9	Unexpected EOF in tag.
10	Incorrectly closed comment.
11	Incorrectly opened comment.
12	Illegal tag name. Use '<' to print '<'.
13	Attribute value was expected.
14	End tag name was expected.
15	Whitespace was expected.
16	Unexpected '<!--' in comment.
17	Attribute name cannot contain U+0022 ("), U+0027 ('), and U+003C (<).
18	Unquoted attribute value cannot contain U+0022 ("), U+0027 ('), U+003C (<), U+003D (=), and U+0060 (`).
19	Attribute name cannot start with '='.
20	Unexpected null character.
21	'<?' is allowed only in XML context.
22	Illegal '/' in tags.
23	Invalid end tag.
24	Element is missing end tag.
25	Interpolation end sign was not found.
26	Legal directive name was expected.
27	End bracket for dynamic directive argument was not found. Note that dynamic directive argument cannot contain spaces.
28	v-if/v-else-if is missing expression.
29	v-if/else branches must use unique keys.
30	v-else/v-else-if has no adjacent v-if or v-else-if.
31	v-for is missing expression.
32	v-for has invalid expression.
33	<template v-for> key should be placed on the <template> tag.
34	v-bind is missing expression.
35	v-on is missing expression.
36	Unexpected custom directive on <slot> outlet.
37	Mixed v-slot usage on both the component and nested <template>. When there are multiple named slots, all slots should use <template> syntax to avoid scope ambiguity.
38	Duplicate slot names found.
39	Extraneous children found when component already has explicitly named default slot. These children will be ignored.
40	v-slot can only be used on components or <template> tags.
41	v-model is missing expression.
42	v-model value must be a valid JavaScript member expression.
43	v-model cannot be used on v-for or v-slot scope variables because they are not writable.
44	v-model cannot be used on a prop, because local prop bindings are not writable. Use a v-bind binding combined with a v-on listener that emits update:x event instead.
45	Error parsing JavaScript expression:
46	<KeepAlive> expects exactly one child component.
47	"prefixIdentifiers" option is not supported in this build of compiler.
48	ES module mode is not supported in this build of compiler.
49	"cacheHandlers" option is only supported when the "prefixIdentifiers" option is enabled.
50	"scopeId" option is only supported in module mode.
51	@vnode-* hooks in templates are no longer supported. Use the vue: prefix instead. For example, @vnode-mounted should be changed to @vue:mounted. @vnode-* hooks support has been removed in 3.4.
53	v-html is missing expression.
54	v-html will override element children.
55	v-text is missing expression.
56	v-text will override element children.
57	v-model can only be used on <input>, <textarea> and <select> elements.
58	v-model argument is not supported on plain elements.
59	v-model cannot be used on file inputs since they are read-only. Use a v-on:change listener instead.
60	Unnecessary value binding used alongside v-model. It will interfere with v-model's behavior.
61	v-show is missing expression.
62	<Transition> expects exactly one child element or component.
63	Tags with side effect (<script> and <style>) are ignored in client component templates.

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Production Error Code Reference ​

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Production Error Code Reference

Runtime Errors

Compiler Errors