#201 · Vue Developer Tool

Vue Checker

Check Vue single-file components for structural mistakes, compatibility problems, accessibility issues, and common performance risks without uploading code.

Developer Input

Framework source

Vue source code

<template>
  <ul><li v-for="item in items">{{ item.name }}</li></ul>
</template>
<script setup>
defineProps({ items: Array })
</script>

Vue version

Validation note

Trim whitespace Preserve empty lines Strict checks Auto-run while typing

How to use this developer tool

Paste a Vue SFC into the editor.
Choose Vue 2 or Vue 3.
Enable strict checks when needed.
Run the checker and review line-based findings.

What this developer tool does

Performs deterministic static pattern checks for Vue SFC structure, directives, props, accessibility, security, and version compatibility.

SFC extraction → version checks → rule evaluation → severity scoring

This browser-only checker does not replace the Vue compiler or ESLint.

Example

Use the preloaded sample, run the tool, then inspect the output and status before copying it into a project.

Tips for better output

Use complete framework code when possible.
Select the matching framework version.
Review heuristic findings before changing production code.
Run the project compiler and tests after using generated or transformed output.

FAQ

How do I check a Vue component for syntax errors online?

Paste the Vue SFC, choose the Vue version, and run the checker to receive line-based static findings.

How can I find missing keys in Vue v-for loops?

The checker detects v-for usage without a :key or v-bind:key attribute and reports the relevant line.

How do I validate Vue 3 script setup code?

Select Vue 3 and check code containing script setup, defineProps, or defineEmits for supported structural rules.

Can this tool detect Vue accessibility issues?

It detects common static issues such as missing image alt text and buttons without accessible names.

Does the Vue checker replace ESLint or the compiler?

No. It is a fast browser-side static checker and should be followed by project compilation and linting.

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Analysis modules

Module	Purpose
Structure	SFC blocks and directives
Quality	Accessibility and performance
Compatibility	Vue 2 and Vue 3

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