no-v-html.js

/**
 * @fileoverview Restrict or warn use of v-html to prevent XSS attack
 * @author Nathan Zeplowitz
 */
'use strict'
const utils = require('../utils')
const { toRegExp } = require('../utils/regexp')

module.exports = {
  meta: {
    type: 'suggestion',
    docs: {
      description: 'disallow use of v-html to prevent XSS attack',
      categories: ['vue3-recommended', 'vue2-recommended'],
      url: 'https://eslint.vuejs.org/rules/no-v-html.html'
    },
    fixable: null,
    schema: [{
      type: 'object',
      properties: {
        ignorePattern: {
          type: 'string'
        }
      },
      additionalProperties: false
    }],
    messages: {
      unexpected: "'v-html' directive can lead to XSS attack."
    }
  },
  /** @param {RuleContext} context */
  create(context) {
    const options = context.options[0]
    const ignoredVarMatcher = options?.ignorePattern
      ? toRegExp(options.ignorePattern, { remove: 'g' })
      : undefined

    return utils.defineTemplateBodyVisitor(context, {
      /** @param {VDirective} node */
      "VAttribute[directive=true][key.name.name='html']"(node) {
        if (ignoredVarMatcher && node.value.expression.type === 'Identifier' && ignoredVarMatcher.test(node.value.expression.name)) {
          return
        }
        context.report({
          node,
          loc: node.loc,
          messageId: 'unexpected'
        })
      }
    })
  }
}