valid-v-for.md

Enforce valid v-for directives (valid-v-for)

This rule checks whether every v-for directive is valid.

📖 Rule Details

This rule reports v-for directives in the following cases:

• The directive has that argument. E.g. <div v-for:aaa></div>
• The directive has that modifier. E.g. <div v-for.bbb></div>
• The directive does not have that attribute value. E.g. <div v-for></div>
• If the element which has the directive is a custom component, the component does not have v-bind:key directive. E.g. <your-component v-for="item in list"></your-component>
• The v-bind:key directive does not use the variables which are defined by the v-for directive. E.g. <div v-for="x in list" :key="foo"></div>

If the element which has the directive is a reserved element, this rule does not report even if the element does not have v-bind:key directive because it's not fatal error. require-v-for-key rule reports it.

This rule does not check syntax errors in directives. no-parsing-error rule reports it. The following cases are syntax errors:

• The directive's value is not the form alias in expr. E.g. <div v-for="foo"></div>
• The alias is not LHS. E.g. <div v-for="foo() in list"></div>

👎 Examples of incorrect code for this rule:

<template>
    <div v-for="x in list">
        <div v-for></div>
        <div v-for:aaa="x in list"></div>
        <div v-for.bbb="x in list"></div>
        <your-component v-for="x in list"></your-component>
        <div is="your-component" v-for="x in list"></div>
        <your-component  v-for="x in list" :key="foo"></your-component>
    </div>
</template>

👍 Examples of correct code for this rule:

<template>
    <div>
        <div v-for="x in list"></div>
        <your-component v-for="x in list" :key="x.id"></your-component>
        <div is="your-component" v-for="x in list" :key="x.id"></div>
    </div>
</template>

🔧 Options

Nothing.

👫 Related rules

• require-v-for-key
• no-parsing-error